No Classification
23.10.00.00	Site Products	1	
23.10.05.00	Ground Anchorages	2	
23.10.05.10	Retaining/Stabilizing Ground Anchors	3	
23.10.05.10.11	Components	4	
23.10.05.10.11.11	Anchor Heads	5	
23.10.05.10.11.12	Tendons	5	
23.10.05.10.14	Grouted Anchors	4	
23.10.05.10.17	Plate Anchors	4	
23.10.05.10.21	Rock Bolts, Rock Anchors	4	
23.10.05.10.24	Anchor Tiebacks	4	
23.10.05.20	Earth Reinforcement Anchors	3	
23.10.05.20.11	Soil Nails	4	
23.10.05.99	Other Ground Anchorages	3	
23.10.10.00	Ground Improvement Products	2	
23.10.10.12	Land/Field Drainage	3	
23.10.10.12.10	Piped Drainage	4	
23.10.10.12.10.11	Land Drainage Pipes	5	
23.10.10.12.20	Drainage Blocks	4	
23.10.20.00	Retention Structures	2	
23.10.20.11	Sheet Piles	3	
23.10.20.14	Retaining Walls	3	
23.10.20.14.10	Diaphragm Walls	4	
23.10.20.14.10.11	Slurry Wall Membranes	5	
23.10.20.14.20	Continuous Retaining Walls	4	
23.10.20.14.30	Crib Walls	4	
23.11.00.00	Site Products	1	
23.11.11.00	Ground Anchorages	2	
23.11.11.11	Retaining Stabilizing Ground Anchors	3	
23.11.11.11.11	Retaining Stabilizing Ground Components	4	
23.11.11.11.11.11	Stabilizing Ground Anchor Heads	5	
23.11.11.11.11.13	Stabilizing Ground Tendons	5	
23.11.11.11.13	Stabilizing Ground Grouted Anchors	4	
23.11.11.11.15	Stabilizing Ground Plate Anchors	4	
23.11.11.11.17	Stabilizing Ground Rock Bolts	4	
23.11.11.11.19	Stabilizing Ground Rock Anchors	4	
23.11.11.11.21	Stabilizing Ground Anchor Tiebacks	4	
23.11.11.13	Earth Reinforcement Anchors	3	
23.11.11.13.11	Earth Reinforcement Soil Nails	4	
23.11.13.00	Ground Improvement Products	2	
23.11.13.11	Soil Stabilization Products	3	
23.11.13.11.11	Soil Stabilization Injectable Chemicals	4	
23.11.13.11.13	Soil Stabilization Pressure Grouting	4	
23.11.13.11.15	Ground Freezing Soil Stabilization	4	
23.11.13.11.17	Soil Stabilization Fills	4	
23.11.13.11.17.11	Soil Stabilization Fill Blocks	5	
23.11.13.11.17.13	Soil Stabilization Compressible Fill	5	
23.11.13.11.19	Other Soil Stabilizations	4	
23.11.13.11.21	Piped Field Drainage	4	
23.11.13.11.21.11	Field Drainage Land Drainage Pipes	5	
23.11.13.11.23	Field Drainage Blocks	4	
23.11.13.11.25	Field Drainage Geocomposite Drains	4	
23.11.13.11.25.11	Field Drainage Geocomposite Edge Drains	5	
23.11.13.11.25.13	Field Drainage Geocomposite In Place Wall Drains	5	
23.11.13.11.27	Geotextile Subsurface Drainage Filtration	4	
23.11.15.00	Sheeting and Revetments	2	
23.11.15.11	Sheeting Geosynthetics	3	
23.11.15.11.11	Sheeting Geotextiles	4	
23.11.15.11.13	Sheeting Geogrids	4	
23.11.15.11.15	Sheeting Geomembranes	4	
23.11.15.11.17	Sheeting Geocomposites	4	
23.11.15.11.19	Sheeting Mulch Control Netting	4	
23.11.15.11.21	Sheeting Synthetic Erosion Controls	4	
23.11.15.11.23	Sheeting Re vegetation Mats	4	
23.11.15.11.25	Sheeting Turf Reinforcement Mats	4	
23.11.15.13	Revetments	3	
23.11.15.13.11	Revetment Soil Blankets	4	
23.11.15.13.13	Pool Revetments	4	
23.11.15.13.15	Trench Revetments	4	
23.11.15.13.17	Revetment Rock Linings	4	
23.11.15.13.19	Revetment Ripraps	4	
23.11.17.00	Retention Structures	2	
23.11.17.11	Sheet Piles	3	
23.11.17.13	Retaining Walls	3	
23.11.17.13.11	Retaining Diaphragm Walls	4	
23.11.17.13.11.11	Retaining Slurry Wall Membranes	5	
23.11.17.13.13	Continuous Retaining Walls	4	
23.11.17.13.15	Retaining Crib Walls	4	
23.11.17.15	Gabions	3	
23.11.17.17	Fascines	3	
23.11.19.00	Slide and Avalanche Protection	2	
23.11.19.11	Bolt Down Snow Fences	3	
23.11.19.13	Clamp on Equipment	3	
23.11.21.00	Pavements	2	
23.11.21.11	Porous Paving	3	
23.11.21.13	Roadways	3	
23.11.21.13.11	Portable Roadways	4	
23.11.21.13.13	Roadway Surfacing	4	
23.11.21.13.13.11	Roadway Antiskid Texturing	5	
23.11.21.13.15	Detectable Warning Surfaces for Roadways	4	
23.11.21.13.15.11	Crosswalks	5	
23.11.21.13.15.13	Warning Tiles	5	
23.11.21.15	Runways	3	
23.11.21.15.11	Portable Runway	4	
23.11.21.15.13	Helicopter Landing Pads	4	
23.11.21.15.15	Runway Surfacing	4	
23.11.21.15.15.11	Runway Antiskid Texturing	5	
23.11.21.17	Paving Blocks	3	
23.11.21.17.11	Unit Pavers	4	
23.11.21.17.11.11	Asphalt Block Pavers	5	
23.11.21.17.11.13	Brick Pavers	5	
23.11.21.17.11.15	Interlocking Precast Concrete Pavers	5	
23.11.21.17.11.17	Precast Concrete Pavers	5	
23.11.21.17.11.19	Pressed Pavers	5	
23.11.21.17.11.21	Stone Pavers	5	
23.11.21.19	Pavement Slabs	3	
23.11.21.21	Pavement Drainage	3	
23.11.21.21.11	Culverts	4	
23.11.21.21.11.11	Pipe Culverts	5	
23.11.21.21.11.11.11	Metal Pipe Arch Culverts	6	
23.11.21.21.11.13	Concrete Culverts	5	
23.11.21.21.11.13.11	Concrete Arch Buried Bridge Culverts	6	
23.11.21.21.11.13.13	Concrete Arch Culverts	6	
23.11.21.21.11.13.15	Concrete Box Culverts	6	
23.11.21.21.11.13.17	Concrete Rigid Frame Culverts	6	
23.11.21.21.13	Catch Basins	4	
23.11.21.21.15	Channels	4	
23.11.21.21.17	Cleanouts	4	
23.11.23.00	Parking Controls	2	
23.11.23.11	Parking Meters	3	
23.11.23.13	Parking Ticket Dispensers	3	
23.11.23.15	Parking Coin Machine Units	3	
23.11.23.17	Parking Key and Card Control Units	3	
23.11.23.19	Parking Gates	3	
23.11.23.21	Parking Dividers	3	
23.11.23.23	Parking Signs	3	
23.11.23.23.11	Handicap Parking Signs	4	
23.11.23.23.13	Parking Time Zone Signs	4	
23.11.23.23.15	Parking Tow Away Signs	4	
23.11.25.00	Site Barrier Products	2	
23.11.25.11	Perimeter Entry Devices	3	
23.11.25.11.11	Anti Ram Wedge Barriers	4	
23.11.25.13	Perimeter Walls	3	
23.11.25.13.11	Precast Perimeter Concrete Panel Perimeter Walls	4	
23.11.25.13.13	Precast Perimeter Post Perimeter Walls	4	
23.11.25.15	Perimeter Gates	3	
23.11.25.15.11	Drop Arm Gates	4	
23.11.25.15.11.11	Anti Ram Drop Arm Gates	5	
23.11.25.15.13	Rolling Gates	4	
23.11.25.15.15	Sliding Gates	4	
23.11.25.15.15.11	Anti Ram Sliding Gates	5	
23.11.25.15.15.13	Anti Climb Sliding Gates	5	
23.11.25.15.17	Swinging Gates	4	
23.11.25.15.19	Folding Gates	4	
23.11.25.17	Gate Hardware	3	
23.11.25.19	Fences	3	
23.11.25.19.11	Barbed Wire Fences	4	
23.11.25.19.13	Concertina Wire Fences	4	
23.11.25.19.15	Composite Fences	4	
23.11.25.19.17	Ornamental Metal Fences	4	
23.11.25.19.19	Chain Link Metal Fences	4	
23.11.25.19.21	Panel Fences	4	
23.11.25.19.23	Plastic Fences	4	
23.11.25.19.25	Post Fences	4	
23.11.25.19.27	Rail Fences	4	
23.11.25.19.29	Razor Wire Fences	4	
23.11.25.19.31	Wood Fences	4	
23.11.25.19.33	Fencing Fabrics	4	
23.11.25.19.35	Fencing Accessories	4	
23.11.25.19.35.11	Barbed Wire	5	
23.11.25.19.35.13	Concertina Wire	5	
23.11.25.19.35.15	Fence Posts	5	
23.11.27.00	Landscaping	2	
23.11.27.11	Plant Maintenance and Preparation Products	3	
23.11.27.11.11	Topsoil	4	
23.11.27.11.11.11	Loam	5	
23.11.27.11.11.13	Peat Soil	5	
23.11.27.11.13	Soil Fertilizers	4	
23.11.27.11.15	Soil Herbicides	4	
23.11.27.11.15.11	Combined Soil Fertilizer and Herbicides	5	
23.11.27.11.17	Mulch	4	
23.11.27.11.19	Soil Mats	4	
23.11.27.11.21	Plant Netting	4	
23.11.27.11.23	Landscaping Stakes	4	
23.11.27.11.25	Landscaping Blankets	4	
23.11.27.11.27	Landscaping Ground Covers	4	
23.11.27.11.29	Landscaping Forms	4	
23.11.27.11.31	Landscaping Stabilizers	4	
23.11.27.11.33	Lime	4	
23.11.27.11.35	Mowing Equipment	4	
23.11.27.11.35.11	Lawnmowers	5	
23.11.27.11.35.13	Garden Tractors	5	
23.11.27.11.37	Pruning Equipment	4	
23.11.27.11.39	Watering Equipment	4	
23.11.27.13	Planting Accessories	3	
23.11.27.13.11	Landscaping Edging	4	
23.11.27.13.13	Landscape Timbers	4	
23.11.27.13.15	Landscape Stone	4	
23.11.27.13.15.11	Boulders	5	
23.11.27.13.17	Planters	4	
23.11.27.13.19	Tree Grates	4	
23.11.27.13.21	Tree Grids	4	
23.11.27.13.23	Tree Guards	4	
23.11.27.13.25	Plant Tubs	4	
23.11.27.15	Irrigation Equipment	3	
23.11.27.15.11	Irrigation Sprinklers	4	
23.11.27.15.11.11	Installed Sprinkler Heads	5	
23.11.27.15.11.13	Portable Lawn Sprinklers	5	
23.11.27.15.13	Irrigation Hoses	4	
23.11.27.15.13.11	Irrigation Weep Hoses	5	
23.11.27.17	Lawns and Grasses	3	
23.11.27.17.11	Hydro Mulch	4	
23.11.27.17.13	Grass Plugs	4	
23.11.27.17.15	Grass Seeds and Soil Supplements	4	
23.11.27.17.17	Sod	4	
23.11.27.19	Plants	3	
23.11.27.19.11	Shrubs	4	
23.11.27.19.13	Trees	4	
23.11.27.19.15	Plants	4	
23.11.27.19.17	Plant Bulbs	4	
23.11.27.19.19	Floral Plant	4	
23.11.27.19.21	Non Flowering Plant	4	
23.11.27.21	Pond Equipment	3	
23.11.27.21.11	Pond Liners	4	
23.11.27.21.13	Pond Filters	4	
23.11.29.00	Site Furnishings	2	
23.11.29.11	Bicycle Racks and Shelters	3	
23.11.29.11.11	Bicycle Racks	4	
23.11.29.11.13	Bicycle Shelters	4	
23.11.29.11.15	Bicycle Lockers	4	
23.11.29.13	Exterior Seating	3	
23.11.29.13.11	Exterior Benches	4	
23.11.29.13.13	Exterior Chairs	4	
23.11.29.15	Exterior Tables	3	
23.11.29.17	Patio Furniture	3	
23.11.29.17.11	Patio Seating	4	
23.11.29.17.11.11	Patio Chairs	5	
23.11.29.17.11.13	Patio Benches	5	
23.11.29.17.11.15	Patio Chaise Lounges	5	
23.11.29.17.11.17	Patio Sofas	5	
23.11.29.17.13	Patio Tables	4	
23.11.29.17.13.11	Patio Dining Tables	5	
23.11.29.17.13.13	Patio Sofa Tables	5	
23.11.29.19	Exterior Trash Receptacles	3	
23.11.29.19.11	Exterior Wood Trash Receptacles	4	
23.11.29.19.13	Exterior Concrete Trash Receptacles	4	
23.11.29.19.15	Exterior Metal Trash Receptacles	4	
23.11.29.21	Exterior Specialties	3	
23.11.29.21.11	Sundials	4	
23.11.29.21.13	Garden Ornaments	4	
23.11.29.21.15	Bird Houses	4	
23.11.29.21.17	Bird Feeders	4	
23.11.29.21.19	Bird Baths	4	
23.11.29.23	Exterior Storage Structures	3	
23.11.29.23.11	Storage Sheds	4	
23.11.29.23.13	Barns	4	
23.11.29.25	Flagpoles	3	
23.11.29.25.11	Automatic Flagpoles	4	
23.11.29.25.13	Ground Set Flagpoles	4	
23.11.29.25.15	Nautical Flagpoles	4	
23.11.29.25.17	Wall Mounted Flagpoles	4	
23.11.29.27	Exterior Fountains	3	
23.11.29.27.11	Exterior Ornamental Fountains	4	
23.11.29.29	Memorials and Statuary	3	
23.11.29.31	Monuments	3	
23.11.29.33	Exterior Directional Signs	3	
23.11.29.33.11	Finger Post Signs	4	
23.11.29.33.13	Street Nameplates	4	
23.11.29.33.15	Illuminated Directional Signs	4	
23.11.29.33.17	Directional Sign Markers	4	
23.11.29.35	Bollards 	3	
23.11.29.35.11	Active Anti Ram Bollards	4	
23.11.29.35.13	Passive Anti Ram Bollards	4	
23.11.29.35.15	Architectural Bollards	4	
23.11.29.37	Public Lighting Columns	3	
23.11.31.00	Athletic and Recreational Surfaces	2	
23.11.31.11	Sports Field Surfacing	3	
23.11.31.13	Playground Surfaces	3	
23.13.00.00	Structural and Exterior Enclosure Products	1	
23.13.11.00	"Loose Granular Fills, Aggregates, Chips, and Fibers"	2	
23.13.11.11	Powder Fillers	3	
23.13.11.11.11	Mineral Powder Fillers	4	
23.13.11.11.13	Metal Powder Fillers	4	
23.13.11.11.15	Synthetic Powder Fillers	4	
23.13.11.11.17	Residue Powder Fillers	4	
23.13.11.13	Aggregates	3	
23.13.11.13.11	Dense Fills and Aggregates	4	
23.13.11.13.13	Lightweight Fills and Aggregates	4	
23.13.11.13.15	Heavyweight Fills and Aggregates	4	
23.13.11.15	Fibers and Shavings	3	
23.13.11.15.11	Mineral Fibers and Shavings	4	
23.13.11.15.13	Vegetable Fibers and Shavings	4	
23.13.11.15.15	Synthetic Fibers and Shavings	4	
23.13.11.15.17	Other Fibers and Shavings	4	
23.13.13.00	Binding Agents and Admixtures	2	
23.13.13.11	Binding Agents	3	
23.13.13.11.11	Cement	4	
23.13.13.11.11.11	Standard Cement	5	
23.13.13.11.11.13	Specialized Cement	5	
23.13.13.11.11.13.11	High Sulfate Resistant Cement	6	
23.13.13.11.11.13.13	Low Alkali Cement	6	
23.13.13.11.11.13.15	Low Heat Cement	6	
23.13.13.11.11.13.17	Alumina Cement	6	
23.13.13.11.13	Lime	4	
23.13.13.11.13.11	Hydraulic Lime	5	
23.13.13.11.13.13	Air Hardening Lime	5	
23.13.13.11.15	Bitumen Asphalt	4	
23.13.13.11.17	Resinous Binders	4	
23.13.13.11.19	Gypsum	4	
23.13.13.13	Cement Admixtures	3	
23.13.13.13.11	Cement Plasticizing Agents	4	
23.13.13.13.13	Cement Water Retaining Agents	4	
23.13.13.13.15	Cement Air Entraining Agents	4	
23.13.13.13.17	Cement Gas Generating Agents	4	
23.13.13.13.19	Cement Setting Retarders	4	
23.13.13.13.21	Cement Setting Accelerators	4	
23.13.13.13.23	Cement Frostproofing Agents	4	
23.13.13.13.25	Cement Waterproofing Agents	4	
23.13.13.13.27	Cement Coloring Agents	4	
23.13.13.13.29	Cement Admixtures for Injections	4	
23.13.13.13.31	Cement Admixtures for Projections	4	
23.13.13.13.33	Cement Adherence Proofing Agents	4	
23.13.13.13.35	Cement Bonding Agents	4	
23.13.13.13.37	Cement Replacements	4	
23.13.13.13.39	Other Cement Admixtures	4	
23.13.13.15	Gypsum Admixtures	3	
23.13.15.00	Mixtures	2	
23.13.15.11	Concretes	3	
23.13.15.11.11	Cementitious Concretes	4	
23.13.15.11.13	Resinous Concretes	4	
23.13.15.11.15	Hydrocarbon Concretes	4	
23.13.15.11.17	Low Density Concretes	4	
23.13.15.13	Mortars	3	
23.13.15.13.11	Portland Cement Lime Mortars	4	
23.13.15.13.13	Masonry Cement Mortars	4	
23.13.15.13.15	Mortar Cements	4	
23.13.15.13.17	Gypsum Based Mortars	4	
23.13.15.13.19	Resinous Mortar	4	
23.13.15.13.21	Chemical Resistant Mortar	4	
23.13.15.13.23	Refractory Mortar	4	
23.13.15.13.25	Premixed Mortar	4	
23.13.15.13.27	Surface Bonding Mortar	4	
23.13.15.13.29	Mortar Pigments	4	
23.13.15.15	Grouts	3	
23.13.15.15.11	Concrete Grouts	4	
23.13.15.15.11.11	Shrink Resistant Concrete Grouts	5	
23.13.15.15.11.13	Catalyzed Metallic Concrete Grouts	5	
23.13.15.15.11.15	Epoxy Concrete Grouts	5	
23.13.15.15.11.17	Nonmetallic Concrete Grouts	5	
23.13.15.15.13	Masonry Grouts	4	
23.13.15.15.13.11	Chemical Resistant Masonry Grouts	5	
23.13.17.00	Profiles	2	
23.13.17.11	Rigid Profiles	3	
23.13.17.11.11	Ferrous Metal Rigid Profiles	4	
23.13.17.11.13	Non Ferrous Metal Rigid Profiles	4	
23.13.17.11.15	Wood Rigid Profiles	4	
23.13.17.11.15.11	Lumber Rigid Profiles	5	
23.13.17.11.15.11.11	Hardwood Rigid Profiles	6	
23.13.17.11.15.11.13	Softwood Rigid Profiles	6	
23.13.17.11.15.11.15	Laminated Rigid Profiles	6	
23.13.17.11.15.13	Non Structural Heavy Timber Rigid Profiles	5	
23.13.17.11.17	Plastic Rigid Profiles	4	
23.13.17.11.19	Composite Rigid Profiles	4	
23.13.17.13	Flexible Profiles	3	
23.13.17.13.11	Plastic Flexible Profiles	4	
23.13.17.13.13	Rubber Flexible Profiles	4	
23.13.17.13.13.11	Natural Rubber Flexible Profiles	5	
23.13.17.13.13.13	Butyl Flexible Profiles	5	
23.13.17.13.13.15	Neoprene Flexible Profiles	5	
23.13.17.13.13.17	Silicone Flexible Profiles	5	
23.13.17.13.13.19	Polysulfide Flexible Profiles	5	
23.13.17.15	Precast Profiles	3	
23.13.17.15.11	Precast Hollow Core Sheets	4	
23.13.17.15.13	Precast Tees	4	
23.13.17.15.15	Precast Double Tees	4	
23.13.17.17	Lath	3	
23.13.17.17.11	Gypsum Lath	4	
23.13.17.17.13	Lead Lined Lath	4	
23.13.17.17.15	Metal Lath	4	
23.13.17.17.17	Veneer Plaster Base Lath	4	
23.13.17.17.19	Wood Lath	4	
23.13.19.00	"Sheets, Boards, and Slabs"	2	
23.13.19.11	Thin Flexible Sheets 	3	
23.13.19.11.11	Thin Sheets	4	
23.13.19.11.11.11	Thin Metal Sheets	5	
23.13.19.11.11.13	Thin Wood Sheets	5	
23.13.19.11.11.15	Building Papers	5	
23.13.19.11.11.17	Thin Plastic Sheets	5	
23.13.19.11.11.19	Thin Rubber Sheets	5	
23.13.19.11.13	Textiles	4	
23.13.19.11.15	Mesh for General Use	4	
23.13.19.13	"Rigid Sheets, Slabs, Plates"	3	
23.13.19.13.11	Solid Sheets	4	
23.13.19.13.11.11	Solid Stone Sheets	5	
23.13.19.13.11.13	Solid Cementitious Sheets	5	
23.13.19.13.11.15	Solid Mineral Sheets	5	
23.13.19.13.11.17	Solid Glass Sheets	5	
23.13.19.13.11.19	Solid Metal Sheets	5	
23.13.19.13.11.21	Solid Wood Based Sheets	5	
23.13.19.13.11.23	Solid Plastic Sheets	5	
23.13.19.13.11.25	Solid Resin Sheets	5	
23.13.19.13.11.27	Solid Fiberglass Sheets	5	
23.13.19.13.13	Hollow Core Sheets	4	
23.13.19.13.13.11	Wood Based Hollow Core Sheets	5	
23.13.19.13.13.13	Mineral Hollow Core Sheets	5	
23.13.19.13.13.15	Metal Hollow Core Sheets	5	
23.13.19.13.13.17	Plastic Hollow Core Sheets	5	
23.13.19.15	Gratings	3	
23.13.19.17	"Blankets, Quilts"	3	
23.13.21.00	Blocks and Bricks	2	
23.13.21.11	Concrete Masonry Units	3	
23.13.21.11.11	Concrete Blocks	4	
23.13.21.11.13	Exposed Aggregate Concrete Masonry Units	4	
23.13.21.11.15	Fluted Concrete Masonry Units	4	
23.13.21.11.17	Interlocking Concrete Masonry Units	4	
23.13.21.11.19	Molded Face Concrete Masonry Units	4	
23.13.21.11.21	Prefaced Concrete Masonry Units	4	
23.13.21.11.23	Preinsulated Concrete Masonry Units	4	
23.13.21.11.25	Sound Absorbing Concrete Masonry Units	4	
23.13.21.11.27	Split Face Concrete Masonry Units	4	
23.13.21.13	Calcium Silicate Masonry Units	3	
23.13.21.15	Glass Masonry Units	3	
23.13.21.17	Adobe Masonry Units	3	
23.13.21.19	Clay Masonry Units	3	
23.13.21.19.11	Common Bricks	4	
23.13.21.19.13	Face Bricks	4	
23.13.21.19.15	Fire Bricks	4	
23.13.21.19.17	Glazed Bricks	4	
23.13.21.19.19	Ceramic Glazed Clay Masonry Units	4	
23.13.21.19.21	Clay Tile	4	
23.13.21.19.23	Structural Clay Tiles	4	
23.13.21.19.25	Clay Flue Linings	4	
23.13.21.19.27	Terra Cotta Units	4	
23.13.21.21	Masonry Anchorage and Reinforcement	3	
23.13.21.21.11	Masonry Reinforcing	4	
23.13.21.21.11.11	Continuous Joint Reinforcing	5	
23.13.21.21.11.13	Reinforcing Bars	5	
23.13.21.21.13	Masonry Ties	4	
23.13.21.21.13.11	Flexible Masonry Ties	5	
23.13.21.21.13.13	Masonry Veneer Ties	5	
23.13.21.21.13.15	Rigid Masonry Ties	5	
23.13.21.21.15	Masonry Anchors	4	
23.13.21.21.15.11	Masonry Veneer Anchors	5	
23.13.21.21.15.13	Stone Masonry Anchors	5	
23.13.21.23	Special Profiles for Masonry 	3	
23.13.21.23.11	Special Masonry Shapes	4	
23.13.21.23.13	Masonry Sills and Thresholds	4	
23.13.21.23.15	Masonry Moldings	4	
23.13.21.23.17	Masonry Copings	4	
23.13.21.23.19	Masonry Quoins	4	
23.13.21.23.21	Masonry Cornices	4	
23.13.21.25	Structural Support for Masonry	3	
23.13.21.25.11	Lintels	4	
23.13.21.25.11.11	Lintel Former Units	5	
23.13.21.25.13	Wall Connectors and Starters	4	
23.13.21.25.15	Supports for Masonry	4	
23.13.21.25.15.11	Masonry Angles	5	
23.13.21.25.15.11.11	Masonry Shelf Angles	6	
23.13.21.25.15.13	Gussets	5	
23.13.21.27	Ancillary Products for Masonry	3	
23.13.21.27.11	Embedded Flashing	4	
23.13.21.27.13	Cavity Closers	4	
23.13.21.27.15	Cavity Weep and Ventilation Units	4	
23.13.21.27.15.11	Cavity Weeps	5	
23.13.21.27.15.13	Cavity Vents	5	
23.13.21.27.15.15	Cavity Drainage Material	5	
23.13.21.27.17	Masonry Joint Materials	4	
23.13.21.27.17.11	Masonry Control Joints	5	
23.13.21.27.17.13	Masonry Expansion Joints	5	
23.13.21.27.19	Airbricks	4	
23.13.23.00	"Mechanical Fasteners, Adhesives, and Sealants"	2	
23.13.23.11	Mechanical Fasteners	3	
23.13.23.11.11	Cast In Anchorages	4	
23.13.23.11.11.11	Rail Anchors	5	
23.13.23.11.11.13	Screw Cases	5	
23.13.23.11.11.15	Anchor Blocks	5	
23.13.23.11.11.17	Cast In Anchorages Inserts	5	
23.13.23.11.11.17.11	Cast In Anchorages Inserts Adjustable Wedges	6	
23.13.23.11.11.17.13	Cast In Anchorages Inserts Adjustable Boxes	6	
23.13.23.11.11.17.15	Threaded Cast In Anchorages Inserts 	6	
23.13.23.11.11.19	Dovetail Slots	5	
23.13.23.11.13	Multi Purpose Mechanical Fasteners	4	
23.13.23.11.13.11	Plugs	5	
23.13.23.11.13.13	Staples	5	
23.13.23.11.13.15	Nails	5	
23.13.23.11.13.17	Rivets	5	
23.13.23.11.13.19	Screws	5	
23.13.23.11.13.21	Bolts and Nuts	5	
23.13.23.11.13.23	Threaded Rods and Nuts	5	
23.13.23.11.13.25	Bandings	5	
23.13.23.11.15	Structural Mechanical Fasteners in Hardened Concrete and Masonry	4	
23.13.23.11.15.11	Expansion Anchors	5	
23.13.23.11.15.13	Undercut Anchors	5	
23.13.23.11.15.15	Bonded Anchors	5	
23.13.23.11.17	Mechanical Fasteners for Metal Structures	4	
23.13.23.11.19	Mechanical Fasteners for Wood Structures	4	
23.13.23.11.19.11	Nail Plates	5	
23.13.23.11.19.13	Wood Connectors	5	
23.13.23.11.19.15	Framing Anchors	5	
23.13.23.11.21	Mechanical Fasteners for Glass Structures	4	
23.13.23.13	Welded Joint Products	3	
23.13.23.13.11	Soldering Products	4	
23.13.23.13.13	Brazing Products	4	
23.13.23.13.15	Welding Products	4	
23.13.23.15	Adhesives	3	
23.13.23.15.11	Natural Adhesives and Glues	4	
23.13.23.15.13	Synthetic Adhesives	4	
23.13.23.15.15	Sound Proofing Adhesive	4	
23.13.23.17	General Purpose Tape	3	
23.13.23.19	"Joint Fillers, Sealants, and Mastics"	3	
23.13.23.19.11	Joint Fillers	4	
23.13.23.19.11.11	Backer Rods	5	
23.13.23.19.13	Putties	4	
23.13.23.19.15	Construction Sealants	4	
23.13.23.19.15.11	Elastomeric Construction Sealants	5	
23.13.23.19.15.13	Rigid Construction Sealants	5	
23.13.23.19.15.15	Sanitary Construction Sealants	5	
23.13.23.19.15.17	Chemical Resistant Construction Sealants	5	
23.13.23.19.15.19	Water Immersed Construction Sealants	5	
23.13.23.19.17	Preformed Joint Seals	4	
23.13.23.19.17.11	Compression Seals	5	
23.13.23.19.17.13	Joint Gaskets	5	
23.13.23.21	"Ropes, Wires, and Cables"	3	
23.13.23.21.11	Ropes	4	
23.13.23.21.13	Wires	4	
23.13.23.21.15	Cables	4	
23.13.25.00	Thermal and Moisture Protective Products?	2	
23.13.25.11	Fireproofing	3	
23.13.25.11.11	Board Fireproofing	4	
23.13.25.11.11.11	Calcium Silicate Board Fireproofing	5	
23.13.25.11.11.13	Slag Fiberboard Fireproofing	5	
23.13.25.11.13	Blanket Fireproofing	4	
23.13.25.11.13.11	Blanket Fireproofing Smoke Containment Barriers	5	
23.13.25.11.15	Fireproofing Coatings	4	
23.13.25.11.15.11	Cement Aggregate Fireproofing	5	
23.13.25.11.15.13	Cementitious Fireproofing	5	
23.13.25.11.15.15	Foamed Magnesium Oxychloride Fireproofing	5	
23.13.25.11.15.17	Intumescent Mastic Fireproofing	5	
23.13.25.11.15.19	Magnesium Cement Fireproofing	5	
23.13.25.11.15.21	Mineral Fiber Cementitious Fireproofing	5	
23.13.25.11.15.23	Miner Fiber Fireproofing	5	
23.13.25.13	Firestopping	3	
23.13.25.13.11	Penetrations Firestopping	4	
23.13.25.13.11.11	Annular Space Protection Firestopping	5	
23.13.25.13.11.13	Fire Resistant Joint Sealants	5	
23.13.25.13.11.15	Firestopping Foams	5	
23.13.25.13.11.15.11	Intumescent Firestopping Foams	6	
23.13.25.13.11.15.13	Silicone Firestopping Foams	6	
23.13.25.13.11.17	Firestopping Mortars	5	
23.13.25.13.11.19	Firestopping Pillows	5	
23.13.25.13.11.21	Firestopping Thermal Barriers for Plastics	5	
23.13.25.13.13	Fire Safing	4	
23.13.25.13.13.11	Fire Safing Fibrous Blankets	5	
23.13.25.13.13.13	Fire Safing Sealants	5	
23.13.25.13.13.15	Fire Safing Clip Anchors	5	
23.13.25.15	Dampproofings	3	
23.13.25.15.11	Dampproofing Membranes	4	
23.13.25.15.13	Dampproofing Coatings	4	
23.13.25.15.13.11	Bituminous Dampproofing Coatings	5	
23.13.25.15.13.13	Cementitious Dampproofing Coatings	5	
23.13.25.17	Waterproofing	3	
23.13.25.17.11	Built Up Bituminous Waterproofing	4	
23.13.25.17.13	Sheet Waterproofing	4	
23.13.25.17.13.11	Bituminous Sheet Waterproofing	5	
23.13.25.17.13.13	Elastomeric Sheet Waterproofing	5	
23.13.25.17.13.15	Modified Bituminous Sheet Waterproofing	5	
23.13.25.17.13.17	Thermoplastic Sheet Waterproofing	5	
23.13.25.17.15	Fluid Applied Waterproofing	4	
23.13.25.17.15.11	Hot Applied Rubberized Asphalt	5	
23.13.25.17.17	Sheet Metal Waterproofing	4	
23.13.25.17.19	Cementitious and Reactive Waterproofing	4	
23.13.25.17.19.11	Acrylic Modified Cement Waterproofing	5	
23.13.25.17.19.13	Crystalline Waterproofing	5	
23.13.25.17.19.15	Metal Oxide Waterproofing	5	
23.13.25.17.21	Bentonite Waterproofing	4	
23.13.25.17.21.11	Bentonite Panel Waterproofing	5	
23.13.25.17.21.13	Bentonite Sheet Waterproofing	5	
23.13.25.17.23	Waterproof Traffic Coatings	4	
23.13.25.17.23.11	Pedestrian Waterproof Traffic Coatings	5	
23.13.25.17.23.13	Vehicular Waterproof Traffic Coatings	5	
23.13.25.19	Thermal Insulation?	3	
23.13.25.19.11	Slab and Board Thermal Insulation	4	
23.13.25.19.11.11	Polystyrene Slab and Board Thermal Insulation	5	
23.13.25.19.11.11.11	Expanded Polystyrene Slab and Board Thermal Insulation	6	
23.13.25.19.11.11.13	Extruded Polystyrene Slab and Board Thermal Insulation	6	
23.13.25.19.11.13	Urethane Slab and Board Thermal Insulation	5	
23.13.25.19.11.15	Perlite Slab and Board Thermal Insulation	5	
23.13.25.19.11.17	Fiberglass Slab and Board Thermal Insulation	5	
23.13.25.19.13	Blanket Thermal Insulation	4	
23.13.25.19.13.11	Fiberglass Blanket Thermal Insulation	5	
23.13.25.19.13.13	Rock Wool Blanket Thermal Insulation	5	
23.13.25.19.15	Thermal Insulation Coatings	4	
23.13.25.19.15.11	Sprayed Thermal Insulation Coatings	5	
23.13.25.19.15.11.11	Sprayed Cellulose Thermal Insulation Coatings	6	
23.13.25.19.17	Loose Fill Thermal Insulation	4	
23.13.25.19.17.11	Granular Fill Thermal Insulation	5	
23.13.25.21	Sound Isolation Insulation	3	
23.13.25.21.11	Slab and Board Sound Isolation Insulation	4	
23.13.25.21.13	Fiberglass Slab and Board Sound Isolation Insulation	4	
23.13.25.21.15	Blanket Sound Isolation Insulation	4	
23.13.25.21.15.11	Fiberglass Blanket Sound Isolation Insulation	5	
23.13.25.21.15.13	Rock Wool Blanket Sound Isolation Insulation	5	
23.13.25.21.17	Sound Isolation Coatings	4	
23.13.25.21.19	Sound Isolation Loose Fills	4	
23.13.25.21.19.11	Granular Sound Isolation Loose Fills	5	
23.13.25.23	Damage Prevention Products	3	
23.13.25.23.11	Products for Prevention of Biological Damage	4	
23.13.25.23.11.11	Coatings for Prevention of Biological Damage	5	
23.13.25.23.13	Products for Prevention of Chemical Damage	4	
23.13.25.23.13.11	Tiles and Slabs for Prevention of Chemical Damage	5	
23.13.25.23.13.13	Sheets for Prevention of Chemical Damage	5	
23.13.25.23.13.15	Coatings for Prevention of Chemical Damage	5	
23.13.25.23.15	Products for Prevention of Abrasive Wear	4	
23.13.25.25	Air Barriers	3	
23.13.25.27	Vapor Barriers	3	
23.13.27.00	Maintenance Products and Chemicals for Construction	2	
23.13.27.11	Cleaning and Maintenance Products	3	
23.13.27.11.11	Cleaning Products	4	
23.13.27.11.13	Maintenance Products	4	
23.13.27.11.15	Combined Cleaning and Protection Products	4	
23.13.27.13	Repair Products	3	
23.13.27.13.11	Repair Mortars	4	
23.13.27.13.13	Concrete Restoration and Cleaning Products	4	
23.13.27.13.13.11	Concrete Cleaning Products	5	
23.13.27.13.13.13	Concrete Resurfacing Products	5	
23.13.27.13.13.15	Concrete Rehabilitation Products	5	
23.13.27.13.15	Masonry Restoration and Cleaning Products	4	
23.13.27.13.15.11	Unit Masonry Restoration Products	5	
23.13.27.13.15.13	Stone Restoration products	5	
23.13.27.13.15.15	Unit Masonry Cleaning Products	5	
23.13.27.13.15.17	Stone Cleaning products	5	
23.13.27.13.17	Metal Restoration and Cleaning Products	4	
23.13.27.13.19	Wood and Plastic Restoration and Cleaning Products	4	
23.13.27.13.19.11	Wood Restoration and Cleaning Products	5	
23.13.27.13.19.13	Plastic Restoration and Cleaning Products	5	
23.13.27.15	Chemicals for Construction	3	
23.13.27.15.11	Solvents	4	
23.13.27.15.13	Acids	4	
23.13.27.15.15	Alkalis	4	
23.13.27.15.17	Salts	4	
23.13.29.00	Foundations	2	
23.13.29.11	Foundation Piles	3	
23.13.29.11.11	Foundation Pile Components?	4	
23.13.29.11.11.11	Pile Casings (Linings)	5	
23.13.29.11.11.13	Cores and Mandrels	5	
23.13.29.11.11.15	Pile Extension Pieces	5	
23.13.29.11.11.17	Pile Shoes	5	
23.13.29.11.11.19	Pile Splices	5	
23.13.29.11.11.21	Pile Caps	5	
23.13.29.11.13	Driven Piles	4	
23.13.29.11.13.11	Composite Driven Piles	5	
23.13.29.11.13.13	Concrete Filled Steel Driven Piles	5	
23.13.29.11.13.15	Precast Concrete Driven Piles	5	
23.13.29.11.13.17	Rolled Steel Section Driven Piles	5	
23.13.29.11.13.19	Unfilled Tubular Steel Driven Piles	5	
23.13.29.11.13.21	Wood Driven Piles	5	
23.13.29.11.13.23	Sheet Driven Piles	5	
23.13.29.11.15	Screw Piles	4	
23.13.29.13	"Caissons, Foundation Casings"	3	
23.13.29.13.11	Well Foundation Casings	4	
23.13.29.13.13	Caissons	4	
23.13.29.15	Shallow Foundations	3	
23.13.29.15.11	Column Bases	4	
23.13.29.15.13	Grade Beams	4	
23.13.29.15.15	Strip Foundation Blocks	4	
23.13.29.17	Special Foundations	3	
23.13.29.17.11	Controlled Modulus Columns	4	
23.13.29.17.13	Other Special Foundations	4	
23.13.31.00	Structural Concrete Products	2	
23.13.31.11	Structural Concrete	3	
23.13.31.13	Ready Mixed Concrete 	3	
23.13.31.15	Precast Structural Concrete	3	
23.13.31.17	Concrete Formwork	3	
23.13.31.17.11	Steel Forms	4	
23.13.31.17.13	Prefabricated Stair Forms	4	
23.13.31.17.15	Concrete Form Liners	4	
23.13.31.17.17	Insulated Concrete Forms	4	
23.13.31.19	Non Formwork	3	
23.13.31.21	Reinforcement and Prestressing Components	3	
23.13.31.21.11	Reinforcement Components	4	
23.13.31.21.11.11	Reinforcing Steel	5	
23.13.31.21.11.13	Reinforcement Steel Mesh	5	
23.13.31.21.11.13.11	Welded Wire Fabric Reinforcing	6	
23.13.31.21.11.15	Fibrous Reinforcing	5	
23.13.31.21.11.15.11	Steel Fibrous Reinforcing	6	
23.13.31.21.11.15.13	Synthetic Fibrous Reinforcing	6	
23.13.31.21.11.17	Reinforcement Couplers	5	
23.13.31.21.11.19	Reinforcement Spacers	5	
23.13.31.21.11.21	Reinforcement Accessories	5	
23.13.31.21.13	Prestressing Components	4	
23.13.31.21.13.11	Stressing Tendons	5	
23.13.31.21.13.11.11	Steel Stressing Tendons	6	
23.13.31.21.13.11.11.11	Steel Strand Stressing Tendons	6	
23.13.31.21.13.11.11.13	Steel Wire Stressing Tendons	6	
23.13.31.21.13.11.11.15	Steel Bar Stressing Tendons	6	
23.13.31.21.13.11.13	Glass Fibers	6	
23.13.31.21.13.13	Steel Bars	5	
23.13.31.21.13.15	Glass Fiber Tendons	5	
23.13.31.21.13.17	Prestressing Couplers	5	
23.13.31.21.13.19	Tendon Sheathing	5	
23.13.31.21.13.19.11	Tendon Sheathing Ducts	6	
23.13.31.21.13.21	Prestressing Anchorages	5	
23.13.31.21.15	Post Tensioning Products	4	
23.13.31.21.17	Complete Reinforcement Cages	4	
23.13.31.21.19	Cast In Jointing	4	
23.13.31.21.19.11	Expansion and Contraction Joints	5	
23.13.31.21.19.13	Waterstops	5	
23.13.31.23	Concrete Finishing Products	3	
23.13.31.23.11	Stamped Concrete Finishing Products	4	
23.13.31.23.13	Colored Concrete Finishing Products	4	
23.13.33.00	Envelope Enclosure Products	2	
23.13.33.11	Sliding Glass Wall Systems	3	
23.13.33.13	Folding Glass Wall Systems	3	
23.13.33.15	Wall Exteriors	3	
23.13.33.15.11	Blast Resistant Wall Exteriors	4	
23.13.33.17	Infill Facades	3	
23.13.33.17.11	Exterior Wall Assemblies	4	
23.13.33.19	Precast Concrete Facade	3	
23.13.33.19.11	Cladding and Curtainwall Panels	4	
23.13.33.19.11.11	Opening Infill Units	5	
23.13.33.19.11.13	"Imbedded Material Finish Mix, Tiles, Brick"	5	
23.13.33.21	Entrances 	3	
23.13.33.21.11	Aluminum-Framed Entrances	4	
23.13.33.21.11.11	Automatic Aluminum-Framed Entrances	5	
23.13.33.21.11.13	Revolving Door Aluminum-Framed  Entrances	5	
23.13.33.21.11.15	Balanced Door Aluminum-Framed  Entrances	5	
23.13.33.21.11.17	Pressure-Resistant Aluminum-Framed  Entrances	5	
23.13.33.21.11.19	Intensive Care Unit/Critical Care Unit Aluminum-Framed  Entrances	5	
23.13.33.21.13	Bronze-Framed Entrances	4	
23.13.33.21.13.11	Automatic Bronze-Framed Entrances	5	
23.13.33.21.13.13	Revolving Door Bronze-Framed  Entrances	5	
23.13.33.21.13.15	Balanced Door Bronze-Framed  Entrances	5	
23.13.33.21.13.17	Pressure-Resistant Bronze-Framed  Entrances	5	
23.13.33.21.13.19	Intensive Care Unit/Critical Care Unit Bronze-Framed  Entrances	5	
23.13.33.21.15	Stainless-Steel-Framed Entrances 	4	
23.13.33.21.15.11	Automatic Stainless-Steel-Framed Entrances	5	
23.13.33.21.15.13	Revolving Door Stainless-Steel-Framed  Entrances	5	
23.13.33.21.15.15	Balanced Door Stainless-Steel-Framed  Entrances	5	
23.13.33.21.15.17	Pressure-Resistant Stainless-Steel-Framed  Entrances	5	
23.13.33.21.15.19	Intensive Care Unit/Critical Care Unit Stainless-Steel-Framed  Entrances	5	
23.13.33.21.17	Steel-Framed Entrances 	4	
23.13.33.21.17.11	Automatic Steel-Framed Entrances	5	
23.13.33.21.17.13	Revolving Door  Steel-Framed  Entrances	5	
23.13.33.21.17.15	Balanced Door  Steel-Framed  Entrances	5	
23.13.33.21.17.17	Pressure-Resistant  Steel-Framed  Entrances	5	
23.13.33.21.17.19	Intensive Care Unit/Critical Care Unit  Steel-Framed  Entrances	5	
23.13.33.21.19	All-Glass Entrances	4	
23.13.33.21.19.11	Automatic All-Glass Entrances	5	
23.13.33.21.19.13	Revolving Door  All-Glass  Entrances	5	
23.13.33.21.19.15	Balanced Door  All-Glass  Entrances	5	
23.13.33.21.19.17	Pressure-Resistant  All-Glass Entrances	5	
23.13.33.21.19.19	Intensive Care Unit/Critical Care Unit All-Glass Entrances	5	
23.13.33.23	Storefronts	3	
23.13.33.23.11	Aluminum-Framed Storefronts	4	
23.13.33.23.11.11	Automatic Aluminum-Framed Storefronts	5	
23.13.33.23.11.13	Revolving Door Aluminum-Framed  Storefronts	5	
23.13.33.23.11.15	Balanced Door Aluminum-Framed  Storefronts	5	
23.13.33.23.11.17	Pressure-Resistant Aluminum-Framed  Storefronts	5	
23.13.33.23.11.19	Intensive Care Unit/Critical Care Unit Aluminum-Framed  Storefronts	5	
23.13.33.23.13	Bronze-Framed Storefronts	4	
23.13.33.23.13.11	Automatic Bronze-Framed Storefronts	5	
23.13.33.23.13.13	Revolving Door Bronze-Framed  Storefronts	5	
23.13.33.23.13.15	Balanced Door Bronze-Framed  Storefronts	5	
23.13.33.23.13.17	Pressure-Resistant Bronze-Framed  Storefronts	5	
23.13.33.23.13.19	Intensive Care Unit/Critical Care Unit Bronze-Framed  Storefronts	5	
23.13.33.23.15	Stainless-Steel-Framed Storefronts	4	
23.13.33.23.15.11	Automatic Stainless-Steel-Framed Storefronts	5	
23.13.33.23.15.13	Revolving Door Stainless-Steel-Framed  Storefronts	5	
23.13.33.23.15.15	Balanced Door Stainless-Steel-Framed Storefronts	5	
23.13.33.23.15.17	Pressure-Resistant Stainless-Steel-Framed  Storefronts	5	
23.13.33.23.15.19	Intensive Care Unit/Critical Care Unit Stainless-Steel-Framed  Storefronts	5	
23.13.33.23.17	Steel-Framed Storefronts	4	
23.13.33.23.17.11	Automatic Steel-Framed Storefronts	5	
23.13.33.23.17.13	Revolving Door  Steel-Framed  Storefronts	5	
23.13.33.23.17.15	Balanced Door  Steel-Framed  Storefronts	5	
23.13.33.23.17.17	Pressure-Resistant  Steel-Framed  Storefronts	5	
23.13.33.23.17.19	Intensive Care Unit/Critical Care Unit  Steel-Framed  Storefronts	5	
23.13.33.23.19	All-Glass Storefronts	4	
23.13.33.23.19.11	Automatic All-Glass Storefronts	5	
23.13.33.23.19.13	Revolving Door  All-Glass  Storefronts	5	
23.13.33.23.19.15	Balanced Door  All-Glass  Storefronts	5	
23.13.33.23.19.17	Pressure-Resistant  All-Glass Storefronts	5	
23.13.33.23.19.19	Intensive Care Unit/Critical Care Unit All-Glass Storefronts	5	
23.13.33.25	Precast Modules 	3	
23.13.33.27	Glazed Facade and Roof Structures	3	
23.13.33.27.11	Curtain Walls	4	
23.13.33.27.11.11	Curtain Wall Components?	5	
23.13.33.27.11.11.11	Curtain Wall Frames	6	
23.13.33.27.11.11.13	Curtain Wall Sections	6	
23.13.33.27.11.11.15	Curtain Wall Infill Panels	6	
23.13.33.27.11.13	Metal Framed Curtain Wall	5	
23.13.33.27.11.15	Translucent Curtain Wall Assemblies	5	
23.13.33.27.13	Structural Glazing	4	
23.13.33.27.13.11	Structural Glass Curtain Walls	5	
23.13.33.27.15	Suspended Glazing	4	
23.13.33.27.17	Patent Glazing 	4	
23.13.33.27.19	Glazed Roof Structures	4	
23.13.33.27.19.11	Sections for Glazed Roofs	5	
23.13.33.27.19.13	Sloped Glazing Assemblies	5	
23.13.33.27.19.15	Translucent Roof Assemblies	5	
23.13.33.27.19.17	Translucent Wall Assemblies	5	
23.13.35.00	Framing Products	2	
23.13.35.11	Structural Frames	3	
23.13.35.11.11	Beam Column Frames	4	
23.13.35.11.13	Column Slab Frames	4	
23.13.35.11.13.11	Columns	5	
23.13.35.11.13.13	Beams	5	
23.13.35.11.15	Portal Frames	4	
23.13.35.11.17	Structural Racking	4	
23.13.35.11.19	Structural Bearings	4	
23.13.35.11.19.11	Structural Roller Bearings	5	
23.13.35.11.19.13	Structural Slide Bearings	5	
23.13.35.11.19.15	Structural Rocker Bearings	5	
23.13.35.11.19.17	Structural Fixed Bearings	5	
23.13.35.11.21	Vibration and Earthquake Controls	4	
23.13.35.13	Non Structural Framing Products	3	
23.13.35.15	Space Frames	3	
23.13.35.15.11	Booms Braces	4	
23.13.35.15.13	Couplers	4	
23.13.35.15.15	Complete Space Frames	4	
23.13.35.17	Geodesic Structures	3	
23.13.35.19	"Rafters, Beams, and Joists"	3	
23.13.35.19.11	Trussed Rafters	4	
23.13.35.19.13	Trussed Beams and Joists	4	
23.13.35.19.13.11	Trussed Metal Joists	5	
23.13.35.19.13.13	Trussed Composite Joist Assemblies	5	
23.13.35.19.13.15	Trussed Metal Web Wood Joists	5	
23.13.35.19.13.17	Wood Trusses	5	
23.13.35.19.13.19	Metal Trusses	5	
23.13.35.19.15	Web Beams and Joists	4	
23.13.35.19.15.11	Wood Joists	5	
23.13.35.19.15.13	Wood Beams	5	
23.13.35.19.15.15	Heavy Timber Construction	5	
23.13.35.19.15.17	Engineered Wood Products	5	
23.13.35.19.17	Precast Concrete Beams	4	
23.13.35.19.17.11	Precast Concrete Doubletee Beams	5	
23.13.35.19.17.13	Precast Concrete Hollowcore Beams	5	
23.13.35.19.17.15	Precast Concrete Inverted Tee Beams	5	
23.13.35.19.17.17	Precast Concrete Spandrel Beams	5	
23.13.35.21	Structural Walls	3	
23.13.35.21.11	Concrete Structural Walls	4	
23.13.35.21.13	Masonry Structural Walls	4	
23.13.35.21.15	Wood Framed Structural Walls	4	
23.13.35.21.17	Metal Framed Structural Walls	4	
23.13.35.21.19	Structural Panels	4	
23.13.35.21.19.11	Cementitious Reinforced Structural Panels	5	
23.13.35.21.19.13	Stressed Skin Structural Panels	5	
23.13.35.21.19.15	Structural Insulated Panels 	5	
23.13.35.21.21	Other Structural Walls	4	
23.13.35.23	Structural Floors and Flat Roofs	3	
23.13.35.23.11	Structural Floor Decks	4	
23.13.35.23.11.11	Concrete Structural Floor Decks	5	
23.13.35.23.11.13	Metal Structural Floor Decks	5	
23.13.35.23.11.13.11	Raceway Deck Systems	6	
23.13.35.23.11.13.13	Acoustical Metal Floor Decks	6	
23.13.35.23.11.15	Wood Structural Floor Decks	5	
23.13.35.23.13	Structural Roof Decks	4	
23.13.35.23.13.11	Concrete Structural Roof Decks	5	
23.13.35.23.13.13	Metal Structural Roof Decks	5	
23.13.35.23.13.13.11	Acoustical Metal Roof Deck	6	
23.13.35.23.13.15	Wood Structural Roof Decks	5	
23.13.35.23.15	Structural Grating Floors	4	
23.13.35.23.17	Balconies and Overhang Units	4	
23.13.35.23.17.11	Balcony Components?	5	
23.13.35.23.17.11.11	Balcony Holders and Mechanical Fasteners	6	
23.13.35.23.17.13	Concrete Balconies and Overhang Units	5	
23.13.35.23.17.15	Metal Balconies and Overhang Units	5	
23.13.35.23.17.17	Wood Balconies and Overhang Units	5	
23.13.35.25	Structural Profiled Roofs	3	
23.13.35.25.11	Prefabricated Shell Roofs	4	
23.13.35.25.13	Simulated Stones	4	
23.13.37.00	"Multi-Function Exterior Coverings, Claddings, Linings?"	2	
23.13.37.11	Multi-Function Exterior Claddings	3	
23.13.37.13	Exterior Wall Cladding	3	
23.13.37.15	Exterior Siding	3	
23.13.37.15.11	Metal Exterior Siding	4	
23.13.37.15.13	Composition Exterior Siding	4	
23.13.37.15.15	Mineral Fiber Cement Exterior Siding	4	
23.13.37.15.17	Plastic Exterior Siding	4	
23.13.37.15.19	Wood Exterior Siding	4	
23.13.37.17	Multi Function Exterior Linings	3	
23.13.37.17.11	Sheathing Products	4	
23.13.37.19	Exterior Plasters	3	
23.13.37.21	Preformed Exterior Casings	3	
23.13.37.23	Ancillary Products for Coverings and Claddings	3	
23.13.37.23.11	Supports for Coverings and Claddings	4	
23.13.37.23.13	Mechanical Fasteners for Coverings and Claddings	4	
23.13.37.23.15	Movement and Dividing Joints for Coverings and Claddings	4	
23.13.37.23.17	"Joint Coverings, Flashings, Tapes"	4	
23.13.37.23.19	Reinforcements for Coverings and Claddings	4	
23.13.37.23.21	"Trims, Edgings, Capping"	4	
23.13.37.23.23	Spacers	4	
23.13.37.23.25	Profile Fillers	4	
23.13.37.23.27	"Underlays, Linings, Separations"	4	
23.13.37.23.29	"Beddings, Adhesives for Coverings and Claddings"	4	
23.13.37.23.31	Sealants for Coverings and Claddings	4	
23.13.39.00	"Roof Coverings, Claddings, Linings"	2	
23.13.39.11	Exterior Roof Panels	3	
23.13.39.11.11	Exterior Metal Roof Panels	4	
23.13.39.11.13	Exterior Plastic Roof Panels	4	
23.13.39.11.15	Exterior Wood Roof Panels	4	
23.13.39.11.17	Exterior Composite Roof Panels	4	
23.13.39.11.19	Exterior Faced Roof Panels	4	
23.13.39.11.21	Exterior Aggregate Coated Panels	4	
23.13.39.11.23	Exterior Porcelain Enameled Faced Panels	4	
23.13.39.11.25	Exterior Tile Faced Panels	4	
23.13.39.11.27	Exterior Fiber Reinforced Cementitious Panels	4	
23.13.39.11.29	Exterior Glass Fiber Reinforced Cementitious Panels	4	
23.13.39.11.31	Exterior Miner Fiber Reinforced Cementitious Panels	4	
23.13.39.13	Roof Underlayment	3	
23.13.39.15	Roof Shingles	3	
23.13.39.15.11	Asphalt Roof Shingles	4	
23.13.39.15.13	Fiberglass Reinforced Roof Shingles	4	
23.13.39.15.15	Metal Roof Shingles	4	
23.13.39.15.17	Mineral Fiber Cement Roof Shingles	4	
23.13.39.15.19	Plastic Roof Shingles	4	
23.13.39.15.21	Porcelain Enamel Roof Shingles	4	
23.13.39.15.23	Wood Shingles	4	
23.13.39.15.25	Concrete Roof Shingles	4	
23.13.39.17	Roof Tiles	3	
23.13.39.17.11	Clay Roof Tiles	4	
23.13.39.17.13	Concrete Roof Tiles	4	
23.13.39.17.15	Metal Roof Tiles	4	
23.13.39.17.17	Mineral Fiber Cement Roof Tiles	4	
23.13.39.17.19	Plastic Roof Tiles	4	
23.13.39.17.21	Ceramic Roof Tiles	4	
23.13.39.17.23	Tile Roof Mechanical Fasteners	4	
23.13.39.19	Natural Stone Roofing	3	
23.13.39.19.11	Roof Slates	4	
23.13.39.19.11.11	Slate Roof Mechanical Fasteners	5	
23.13.39.21	Shake Roofing	3	
23.13.39.21.11	Wood Shakes Roofing	4	
23.13.39.23	Flat Roofing	3	
23.13.39.23.11	Acoustical Metal Deck Roofing	4	
23.13.39.23.13	Structural Deck Roofing	4	
23.13.39.23.13.11	Concrete Structural Deck Roofing	5	
23.13.39.23.13.13	Metal Structural Deck Roofing	5	
23.13.39.23.15	Wood Decking Roofing	4	
23.13.39.25	Roof Finish Coating	3	
23.13.39.27	Roof Cladding	3	
23.13.39.27.11	Roof Cladding Sheets	4	
23.13.39.27.11.11	Metal Roof Panels	5	
23.13.39.27.11.13	Sheet Metal Roofing	5	
23.13.39.27.13	Roof Battens Cladding	4	
23.13.39.29	Roof Coverings	3	
23.13.39.29.11	Thatched Roofing	4	
23.13.39.29.13	Sod Roofing	4	
23.13.39.29.15	Vegetated Roof Covering	4	
23.13.39.29.15.11	Vegetated Roof Planting Modules	5	
23.13.39.29.17	Coated Foam Roof Covering	4	
23.13.39.31	Roof Membranes	3	
23.13.39.31.11	Single Layer Roof Membranes	4	
23.13.39.31.11.11	Chlorinated Polyethylene (CPE) Single Layer Roof Membranes	5	
23.13.39.31.11.13	Chlorosulfonated Polyethylene (CSPE) Single Layer Roof Membranes	5	
23.13.39.31.11.15	Copolymer Alloy (CPA) Single Layer Roof Membranes	5	
23.13.39.31.11.17	Elastomeric Single Layer Roof Membranes	5	
23.13.39.31.11.19	Ethylene Interpolymer (EIP) Single Layer Roof Membranes	5	
23.13.39.31.11.21	Ethylene Propylene Diene Monomer (EPDM) Single Layer Roof Membranes	5	
23.13.39.31.11.23	Nitrile Butadiene Polymer (NBP) Single Layer Roof Membranes	5	
23.13.39.31.11.25	Polyisobutylene (PIB) Single Layer Roof Membranes	5	
23.13.39.31.11.27	Polyvinyl chloride (PVC) Single Layer Roof Membranes	5	
23.13.39.31.11.29	Thermoplastic Alloy (TPA) Single Layer Roof Membranes	5	
23.13.39.31.11.31	Thermoplastic Single Layer Roof Membranes	5	
23.13.39.31.13	Multi Layer Roof Membranes	4	
23.13.39.31.13.11	Asphalt Multi Layer Roof Membranes	5	
23.13.39.31.13.13	Built Up Bituminous Multi Layer Roof Membranes	5	
23.13.39.31.13.15	Coal Tar Multi Layer Roof Membranes	5	
23.13.39.31.13.17	Cold Applied Bituminous Multi Layer Roof Membranes	5	
23.13.39.31.13.19	Cold Applied Mastic Multi Layer Roof Membranes	5	
23.13.39.31.13.21	Glass Fiber Reinforced Asphalt Emulsion Multi Layer Roof Membranes	5	
23.13.39.31.13.23	Modified Bituminous Multi Layer Roof Membranes	5	
23.13.39.31.15	Fluid Applied Roofing	4	
23.13.39.31.17	Coated Foam Roofing	4	
23.13.39.31.19	Roll Roofing	4	
23.13.39.33	Roof Decking	3	
23.13.39.33.11	Cementitious Deck Roofing	4	
23.13.39.33.11.11	Cementitious Composite Insulation Deck Roofing	5	
23.13.39.33.11.13	Cementitious Lightweight Cellular Deck Roofing	5	
23.13.39.33.11.15	Cementitious Lightweight Insulating Deck Roofing	5	
23.13.39.33.13	Lightweight Concrete Roofing Insulation	4	
23.13.39.33.13.11	Composite Concrete and Insulation Deck Roofing	5	
23.13.39.33.13.13	Lightweight Cellular Concrete Deck Roofing	5	
23.13.39.33.13.15	Lightweight Insulating Concrete Deck Roofing	5	
23.13.39.33.15	Concrete Deck Roofing	4	
23.13.39.33.15.11	Concrete Composite Insulation Deck Roofing	5	
23.13.39.33.15.13	Concrete Lightweight Cellular Deck Roofing	5	
23.13.39.33.15.15	Concrete Lightweight Insulating Deck Roofing	5	
23.13.39.33.17	Concrete Roof Topping	4	
23.13.39.35	Roof Finishing Coatings	3	
23.13.39.37	Renovation Products for Roof Coverings and Claddings	3	
23.13.41.00	Roof Specialties and Accessories	2	
23.13.41.11	Roof Edgings and Trims	3	
23.13.41.11.11	Roof Copings	4	
23.13.41.11.13	Roof Counterflashing Systems	4	
23.13.41.11.15	Roof Gravel Stops	4	
23.13.41.11.17	Roof Fascias	4	
23.13.41.11.19	Roof Reglets	4	
23.13.41.11.21	Roof Scuppers	4	
23.13.41.13	Roof Flashings	3	
23.13.41.13.11	Laminated Sheet Flexible Roof Flashings	4	
23.13.41.13.13	Modified Bituminous Sheet Flexible Roof Flashings	4	
23.13.41.13.15	Plastic Sheet Flexible Roof Flashings	4	
23.13.41.13.17	Rubber Sheet Flexible Roof Flashings	4	
23.13.41.13.19	Self Adhering Sheet Flexible Roof Flashings	4	
23.13.41.13.21	Roof Vent Flashings	4	
23.13.41.13.23	Roof Flashing Drip Caps	4	
23.13.41.13.25	Roof Penetration Flashings	4	
23.13.41.15	Roof Expansion Joints	3	
23.13.41.17	Roof Vents	3	
23.13.41.17.11	Roof Relief Vents	4	
23.13.41.17.13	Roof Ridge Vents	4	
23.13.41.17.15	Roof Smoke Vents	4	
23.13.41.17.17	Gravity Roof Vents	4	
23.13.41.17.19	Automatic Roof Vents	4	
23.13.41.17.21	Fire Vents	4	
23.13.41.19	Roof Walkways	3	
23.13.41.19.11	Roof Pavers	4	
23.13.41.19.11.11	Precast Concrete Roof Pavers	5	
23.13.41.19.11.13	Pedestals Roof Pavers	5	
23.13.41.19.13	Roof Treads	4	
23.13.41.19.13.11	Rubber Roof Treads	5	
23.13.41.21	Roof Snow Guards	3	
23.13.41.23	Roof Piping Portals	3	
23.13.41.25	Roof Domes	3	
23.13.41.27	Roof Turrets	3	
23.13.41.29	Roof Lanterns	3	
23.13.41.31	Roof Curb	3	
23.13.41.31.11	Structural Roof Curb	4	
23.13.41.31.13	Acoustical Roof Curb	4	
23.13.41.31.15	Manufactured Roof Curbs	4	
23.13.41.33	Roof Gutters	3	
23.13.41.35	Roof Soffits	3	
23.13.41.37	Roof Splash Blocks	3	
23.13.41.39	Roof Drains	3	
23.13.41.39.11	Roof Downspouts	4	
23.13.41.39.13	Roof Drains With Strainer	4	
23.13.41.39.15	Roof Drains Without Strainer	4	
23.13.41.39.17	Eavestroughs	4	
23.13.41.39.17.11	Mechanical Fasteners for Downspouts	5	
23.13.41.39.17.13	Downspout Strainers	5	
23.13.41.39.19	Siphonic Roof Drains	4	
23.15.00.00	Interior and Finish Products	1	
23.15.11.00	Space Division Products	2	
23.15.11.11	Fixed Partitions	3	
23.15.11.11.11	Gypsum Board Fixed Partitions	4	
23.15.11.11.11.11	Metal Framed Gypsum Board Fixed Partitions	5	
23.15.11.11.11.13	Wood Framed Gypsum Board Fixed Partitions	5	
23.15.11.11.13	Plaster Fixed Partitions	4	
23.15.11.11.13.11	Gypsum Plaster Fixed Partitions	5	
23.15.11.11.13.13	Portland Cement Plaster Fixed Partitions	5	
23.15.11.11.13.15	Metal Framed Plaster Fixed Partitions	5	
23.15.11.11.13.17	Wood Framed Plaster Fixed Partitions	5	
23.15.11.11.15	Masonry Fixed Partitions	4	
23.15.11.13	Demountable Partitions	3	
23.15.11.13.11	General Demountable Partitions	4	
23.15.11.13.11.11	Demountable Partitions Component	5	
23.15.11.13.11.11.11	Partition Frames	6	
23.15.11.13.11.11.13	Partition Infill Panels	6	
23.15.11.13.11.11.15	Mechanical Fasteners for Partitions	6	
23.15.11.13.11.11.17	Joint Fillers and Tapes	6	
23.15.11.13.11.13	Gypsum Board Demountable Partitions	5	
23.15.11.13.11.15	Metal Demountable Partitions	5	
23.15.11.13.11.17	Wood Demountable Partitions	5	
23.15.11.15	Sanitary Partitions and Cubicles	3	
23.15.11.15.11	Toilet Compartments and Urinal Screens	4	
23.15.11.15.11.11	Metal Toilet Compartment and Urinal Screens	5	
23.15.11.15.11.13	Plastic Laminate Toilet Compartment and Urinal Screens	5	
23.15.11.15.11.15	Plastic Toilet Compartment and Urinal Screens	5	
23.15.11.15.11.17	Particleboard Toilet Compartment and Urinal Screens	5	
23.15.11.15.11.19	Stone Toilet Compartment and Urinal Screens	5	
23.15.11.15.13	Shower and Dressing Compartments	4	
23.15.11.15.13.11	Metal Shower and Dressing Compartments	5	
23.15.11.15.13.13	Plastic Laminate Shower and Dressing Compartments	5	
23.15.11.15.13.15	Plastic Shower and Dressing Compartments	5	
23.15.11.15.13.17	Particleboard Shower and Dressing Compartments	5	
23.15.11.15.13.19	Stone Shower and Dressing Compartments	5	
23.15.11.15.15	Cubicles	4	
23.15.11.15.15.11	Cubicle Curtains	5	
23.15.11.15.15.13	Cubicle Track and Hardware	5	
23.15.11.15.17	Storage Wall Partitions and Compartments	4	
23.15.11.15.17.11	Wire Mesh Partitions	5	
23.15.11.15.19	Modular Corridor Linings	4	
23.15.11.15.21	Combined Partitions and Ceilings	4	
23.15.11.17	Operable Partitions	3	
23.15.11.17.11	Horizontally Sliding Partitions	4	
23.15.11.17.13	Folding Panel Partitions	4	
23.15.11.17.15	Accordion Folding Partitions	4	
23.15.11.17.17	Coiling Partitions	4	
23.15.11.17.19	Vertically Sliding Room Dividers	4	
23.15.13.00	"Multi-Function Interior Coverings, Claddings, Linings?"	2	
23.15.13.11	Multi Function Interior Claddings	3	
23.15.13.13	Interior Wall and Ceiling Cladding	3	
23.15.13.15	Interior Siding	3	
23.15.13.15.11	Metal Interior Siding	4	
23.15.13.15.13	Composition Interior Siding	4	
23.15.13.15.15	Mineral Fiber Cement Interior Siding	4	
23.15.13.15.17	Plastic Interior Siding	4	
23.15.13.15.19	Wood Interior Siding	4	
23.15.13.17	Multi Function Interior Linings	3	
23.15.13.19	Wall Panels	3	
23.15.13.19.11	Metal Wall Panels	4	
23.15.13.19.13	Plastic Wall Panels	4	
23.15.13.19.15	Wood Wall Panels	4	
23.15.13.19.17	Composite Wall Panels	4	
23.15.13.19.19	Faced Wall Panels	4	
23.15.13.19.21	Aggregate Coated Wall Panels	4	
23.15.13.19.23	Porcelain Enameled Faced Wall Panels	4	
23.15.13.19.25	Tile Faced Wall Panels	4	
23.15.13.19.27	Fiber Reinforced Cementitious Wall Panels	4	
23.15.13.19.29	Glass Fiber Reinforced Cementitious Wall Panels	4	
23.15.13.19.31	Miner Fiber Reinforced Cementitious Wall Panels	4	
23.15.13.19.33	Flexible Wood Wall Sheets	4	
23.15.13.19.35	Acoustical Wall Treatment	4	
23.15.13.21	Ceiling Panels	3	
23.15.13.21.11	Metal Ceiling Panels	4	
23.15.13.21.13	Plastic Ceiling Panels	4	
23.15.13.21.15	Wood Ceiling Panels	4	
23.15.13.21.17	Composite Ceiling Panels	4	
23.15.13.21.19	Faced Ceiling Panels	4	
23.15.13.21.21	Aggregate Coated Ceiling Panels	4	
23.15.13.21.23	Porcelain Enameled Faced Ceiling Panels	4	
23.15.13.21.25	Tile Faced Ceiling Panels	4	
23.15.13.21.27	Fiber Reinforced Cementitious Ceiling Panels	4	
23.15.13.21.29	Glass Fiber Reinforced Cementitious Ceiling Panels	4	
23.15.13.21.31	Miner Fiber Reinforced Cementitious Ceiling Panels	4	
23.15.13.21.33	Flexible Wood Ceiling Sheets	4	
23.15.13.21.35	Acoustical Ceiling Treatment	4	
23.15.13.23	Interior Plasters	3	
23.15.13.25	Preformed Interior Casings	3	
23.15.15.00	"Wall Coverings, Claddings, Linings"	2	
23.15.15.11	Wall Cladding Sections	3	
23.15.15.11.11	Metal Wall Cladding Sections	4	
23.15.15.11.13	Wood Wall Cladding Sections	4	
23.15.15.11.15	Plastics Wall Cladding Sections	4	
23.15.15.11.17	Other Wall Cladding Sections	4	
23.15.15.13	Wall Tiles	3	
23.15.15.13.11	Natural Stone Wall Tiles	4	
23.15.15.13.13	Reconstituted Stone Wall Tiles	4	
23.15.15.13.15	Cementitious Wall Tiles	4	
23.15.15.13.17	Clay Based Wall Tiles	4	
23.15.15.13.19	Metal Wall Tiles	4	
23.15.15.13.21	Vegetable Based Wall Tiles	4	
23.15.15.13.23	Plastics Wall Tiles	4	
23.15.15.13.25	Other Wall Tiles	4	
23.15.15.15	Wall Cladding Panels	3	
23.15.15.15.11	Wall Stone Facing	4	
23.15.15.15.13	Cementitious Wall Cladding Panels	4	
23.15.15.15.13.11	Precast Concrete Wall Cladding Panels	5	
23.15.15.15.15	Metal Wall Cladding Panels	4	
23.15.15.15.17	Wood Based Wall Cladding Panels	4	
23.15.15.15.19	Plastic Wall Cladding Panels	4	
23.15.15.15.19.11	Plastic Wall Cladding Blocks	5	
23.15.15.15.21	Other Wall Cladding Panels	4	
23.15.15.17	Wall Cladding Sheets	3	
23.15.15.17.11	Fiber Based Wall Cladding Sheets	4	
23.15.15.17.13	Metal Wall Cladding Sheets	4	
23.15.15.17.15	Plastic Wall Cladding Sheets	4	
23.15.15.17.17	Fiberglass Reinforced Panels	4	
23.15.15.19	Wall Coverings	3	
23.15.15.19.11	Wallpaper	4	
23.15.15.19.13	Wall Fabrics	4	
23.15.15.19.15	Plastic Wall Coverings	4	
23.15.15.19.17	Cork Wall Covering	4	
23.15.15.19.19	Vinyl Coated Fabric Wall Covering	4	
23.15.15.19.21	Vinyl Wall Covering	4	
23.15.15.19.23	Wall Carpet	4	
23.15.15.19.25	Wall Veneers	4	
23.15.15.21	Wall Blocks	3	
23.15.15.23	Wall Linings	3	
23.15.15.25	Wall Finish Coatings	3	
23.15.15.27	Renders	3	
23.15.15.29	Acoustical Wall Finishes	3	
23.15.15.31	Wall Specialties and Trim	3	
23.15.15.31.11	Wall Pilasters	4	
23.15.15.31.13	Wall Niches	4	
23.15.15.31.15	Wall Moldings	4	
23.15.15.31.17	Renovating Wall Coverings	4	
23.15.15.31.19	Renovating Wall Claddings	4	
23.15.15.33	Wall Finish Restoration Products	3	
23.15.15.35	Security Wall Protection Products	3	
23.15.15.35.11	Blast Resistant Wall Exteriors	4	
23.15.15.35.13	Blast Resistant Wall Interiors	4	
23.15.17.00	Floor Coverings	2	
23.15.17.11	Flooring Specialties and Accessories	3	
23.15.17.11.11	Floor Toppings	4	
23.15.17.11.11.11	Concrete Floor Toppings	5	
23.15.17.11.13	Floor Underlayments	4	
23.15.17.11.13.11	Cementitious Floor Underlayments	5	
23.15.17.11.13.11.11	Gypsum Floor Underlayments	6	
23.15.17.11.13.11.13	Portland Cement Floor Underlayments	6	
23.15.17.11.13.13	Acoustical Underlayments	5	
23.15.17.11.13.15	Crack Prevention Mat Underlayments	5	
23.15.17.11.15	Floor Treatment Products	4	
23.15.17.11.15.11	Floor Sealers	5	
23.15.17.11.15.13	Floor Hardeners	5	
23.15.17.11.15.15	Slip Resistant Floor Treatment	5	
23.15.17.11.15.17	Static Resistant Floor Treatment	5	
23.15.17.11.15.19	Acid Resistant Floor Treatment	5	
23.15.17.11.17	Floor Base and Accessories	4	
23.15.17.11.17.11	Base and Accessories for Floor Coverings	5	
23.15.17.11.17.13	Acoustic Floor Mountings	5	
23.15.17.11.19	Floor Mats and Grilles	4	
23.15.17.11.19.11	Floor Mats	5	
23.15.17.11.19.13	Floor Grilles	5	
23.15.17.11.19.15	Floor Gratings	5	
23.15.17.11.21	Flooring Restoration Products	4	
23.15.17.11.21.11	Bamboo	5	
23.15.17.13	"Floor Covering Strips, Tiles, Blocks, and Slabs"	3	
23.15.17.13.11	Wood Flooring	4	
23.15.17.13.11.11	Cushioned Wood Flooring Assemblies	5	
23.15.17.13.11.13	Mastic Set Wood Flooring Assemblies	5	
23.15.17.13.11.15	Resilient Wood Flooring Assemblies	5	
23.15.17.13.11.17	Wood Athletic Flooring	5	
23.15.17.13.11.19	Wood Block Flooring	5	
23.15.17.13.11.21	Wood Composition Flooring	5	
23.15.17.13.11.23	Wood Parquet Flooring	5	
23.15.17.13.11.25	Wood Strip Flooring	5	
23.15.17.13.13	Tile Flooring	4	
23.15.17.13.13.11	Clay Based Flooring	5	
23.15.17.13.13.13	Ceramic Tile Flooring	5	
23.15.17.13.13.13.11	Ceramic Mosaic Tile Flooring	6	
23.15.17.13.13.13.13	Conductive Tile Flooring	6	
23.15.17.13.13.15	Quarry Tile Flooring	5	
23.15.17.13.13.17	Chemical Resistant Quarry Tile Flooring	5	
23.15.17.13.13.17.11	Porcelain Tile Flooring	6	
23.15.17.13.13.17.13	Glass Mosaic Tile Flooring	6	
23.15.17.13.13.17.15	Plastic Tile Flooring	6	
23.15.17.13.13.17.17	Metal Tile Flooring	6	
23.15.17.13.13.17.19	Natural Cut Stone Tile Flooring	6	
23.15.17.13.13.17.21	Tile Flooring Restoration Products	6	
23.15.17.13.15	Terrazzo Flooring	4	
23.15.17.13.15.11	Portland Cement Terrazzo Flooring	5	
23.15.17.13.15.13	Precast Terrazzo Flooring	5	
23.15.17.13.15.15	Conductive Terrazzo Flooring	5	
23.15.17.13.15.17	Plastic matrix Terrazzo Flooring	5	
23.15.17.13.15.19	Terrazzo Flooring Restoration Products	5	
23.15.17.13.17	Masonry Flooring	4	
23.15.17.13.17.11	Brick Flooring	5	
23.15.17.13.17.11.11	Chemical Resistant Brick Flooring	6	
23.15.17.13.17.13	Stone Flooring	5	
23.15.17.13.17.15	Other Masonry Flooring	5	
23.15.17.13.19	Precast Tile and Slab Flooring	4	
23.15.17.13.21	Metal Flooring	4	
23.15.17.15	Resilient Flooring	3	
23.15.17.15.11	Cork Flooring	4	
23.15.17.15.13	Plastic Flooring	4	
23.15.17.15.15	Rubber Flooring	4	
23.15.17.15.17	Linoleum Flooring	4	
23.15.17.15.19	Mechanical Fasteners for Resilient Floor Coverings	4	
23.15.17.15.19.11	Floor Clips	5	
23.15.17.15.19.13	Carpet Grippers	5	
23.15.17.15.19.15	Stair Rods	5	
23.15.17.15.21	Other Resilient Flooring	4	
23.15.17.17	Carpet Flooring	3	
23.15.17.17.11	Carpet Cushions	4	
23.15.17.17.13	Carpet Tiles	4	
23.15.17.17.15	Indoor Carpet Flooring	4	
23.15.17.17.17	Outdoor Carpet Flooring	4	
23.15.17.17.19	Sheet Carpet Flooring	4	
23.15.17.19	Preformed Flooring Equipment Systems	3	
23.15.17.19.11	Floating Floors	4	
23.15.17.19.13	Portable Floors	4	
23.15.17.19.15	Convertible Floors	4	
23.15.17.19.17	Gymnasium or Dance Flooring	4	
23.15.17.21	Access Flooring Components?	3	
23.15.17.21.11	Access Floor Frames	4	
23.15.17.21.13	Access Floor Infill Panels	4	
23.15.17.23	Rigid Grid Access Flooring	3	
23.15.17.25	Snap On Stringer Access Flooring	3	
23.15.17.27	Stringerless Access Flooring	3	
23.15.17.29	Floor Finishing Coatings	3	
23.15.17.29.11	Industrial Floor Coatings	4	
23.15.17.29.13	Fluid Applied Flooring	4	
23.15.17.29.13.11	Elastomeric Liquid Flooring	5	
23.15.17.29.13.13	Epoxy Marble Chip Flooring	5	
23.15.17.29.13.15	Magnesium Oxychoride Flooring	5	
23.15.17.29.13.17	Mastic Fills Flooring	5	
23.15.17.29.13.19	Resinous Flooring	5	
23.15.17.29.13.21	Seamless Quartz Flooring	5	
23.15.19.00	"Ceiling Coverings, Claddings, and Linings"	2	
23.15.19.11	Ceiling Baffles	3	
23.15.19.13	Ceiling Clouds	3	
23.15.19.15	"Ceiling Tiles, Panels, Strips, and Sections"	3	
23.15.19.15.11	Ceiling Tiles	4	
23.15.19.15.11.11	Acoustical Ceiling Tile	5	
23.15.19.15.13	Ceiling Panels	4	
23.15.19.15.13.11	Acoustical Ceiling Panels	5	
23.15.19.15.13.13	Mirror Ceiling Panels	5	
23.15.19.15.13.15	Curved Ceiling Panels	5	
23.15.19.15.13.17	Metal Ceiling Panels	5	
23.15.19.15.15	Ceiling Covering Strips	4	
23.15.19.15.15.11	Linear Metal Ceiling Covering Strips	5	
23.15.19.15.15.13	Linear Wood Ceiling Covering Strips	5	
23.15.19.15.17	Ceiling Covering Sections	4	
23.15.19.15.17.11	Suspended Decorative Ceiling Grids	5	
23.15.19.17	Ceiling Finishing Coatings	3	
23.15.19.17.11	Textured Ceilings	4	
23.15.19.17.11.11	Gypsum Panel Textured Ceilings	5	
23.15.19.17.11.13	Metal Panel Textured Ceilings	5	
23.15.19.19	Ceiling Specialties and Accessories	3	
23.15.19.19.11	Roses Ceiling Centerpieces	4	
23.15.19.19.13	Ceiling Coving	4	
23.15.19.19.15	Ceiling Cornices	4	
23.15.19.19.17	Ceiling Friezes	4	
23.15.19.19.19	Integral Speaking Panels	4	
23.15.19.21	Ceiling Assembly Restoration Products	3	
23.15.19.23	Ceilings	3	
23.15.19.23.11	Suspended Ceilings	4	
23.15.19.23.11.11	Suspended Ceiling Components?	5	
23.15.19.23.11.11.11	"Suspended Ceilings, Suspension Assembly"	6	
23.15.19.23.11.11.13	"Suspended Ceilings, Panels and Tiles"	6	
23.15.19.23.11.11.15	"Suspended Ceilings, Grids"	6	
23.15.19.23.11.11.17	Mechanical Fasteners for Suspended Ceilings	6	
23.15.19.23.11.13	Acoustical Ceilings	5	
23.15.19.23.11.13.11	Metal Pan Acoustical Ceilings	6	
23.15.19.23.11.13.13	Acoustical Panel Ceilings	6	
23.15.19.23.11.13.15	Acoustical Tile Ceilings	6	
23.15.19.23.11.15	Specialty Ceilings	5	
23.15.19.23.11.15.11	Integrated Ceilings	6	
23.15.19.23.11.15.13	Linear Ceilings	6	
23.15.19.23.11.15.13.11	Metal Linear Ceilings	6	
23.15.19.23.11.15.13.13	Wood Linear Ceilings	6	
23.15.19.23.11.15.15	Luminous Ceilings	6	
23.15.19.23.11.15.17	Mirror Panel Ceilings	6	
23.15.19.23.11.15.19	Textured Ceilings	6	
23.15.19.23.11.15.21	Suspended Decorative Grids	6	
23.15.19.23.11.15.23	Clean Room Ceilings	6	
23.15.19.23.13	Stretched Fabric Ceilings	4	
23.15.21.00	Surface Applied Coatings	2	
23.15.21.11	Paints and Varnishes	3	
23.15.21.11.11	General Purpose Paints and Varnishes	4	
23.15.21.11.11.11	Solvent Based General Purpose Paints and Varnishes	5	
23.15.21.11.11.13	Water Based General Purpose Paints and Varnishes	5	
23.15.21.11.13	Textured Paints	4	
23.15.21.11.13.11	Solvent Based Textured Paints	5	
23.15.21.11.13.13	Water Based Textured Paints	5	
23.15.21.13	Paints for Particular Applications	3	
23.15.21.13.11	Corrosion Prevention Paints	4	
23.15.21.13.13	Solar Reflective Paints	4	
23.15.21.13.15	Fluorescent Paints	4	
23.15.21.13.17	Line Paints	4	
23.15.21.13.19	Roadway Marking Paints	4	
23.15.21.13.21	Swimming Pool Paints	4	
23.15.21.13.23	Coatings for Concrete and Masonry	4	
23.15.21.13.25	Mold/Mildew Resistant Coatings	4	
23.15.21.15	Powder Coating Services	3	
23.15.21.15.11	Factory Applied Metal Powder Coatings	4	
23.15.21.17	Inorganic Metal Treatments	3	
23.15.21.17.11	Galvanized Coatings	4	
23.15.21.17.13	Anodized Coatings	4	
23.15.21.17.15	Electro Plated Coatings	4	
23.15.21.17.17	Vitreous Enameling	4	
23.15.21.19	Stains and Decorative Surface Impregnations	3	
23.15.21.19.11	Decorative Wood Conservation Products	4	
23.15.21.19.13	Stains	4	
23.15.21.19.13.11	Opaque Stains	5	
23.15.21.19.13.11.11	Exterior Opaque Stains	6	
23.15.21.19.13.11.13	Interior Opaque Stains	6	
23.15.21.19.13.13	Transparent Stains	5	
23.15.21.19.13.13.11	Exterior Transparent Stains	6	
23.15.21.19.13.13.13	Interior Transparent Stains	6	
23.15.21.21	High Performance Coatings	3	
23.15.21.21.11	Abrasion Resistant Coatings	4	
23.15.21.21.13	Chemical Resistant Coatings	4	
23.15.21.21.15	Elastomeric Coatings	4	
23.15.21.21.17	Fire Resistant Coatings	4	
23.15.21.21.19	Graffiti Resistant Coatings	4	
23.15.21.21.21	High Building Coatings	4	
23.15.21.21.23	Intumescent Paints	4	
23.15.21.21.25	Marine Coatings	4	
23.15.21.21.27	Textured Plastic Coatings	4	
23.15.21.23	Protective Surface Impregnations	3	
23.15.21.23.11	Surface Consolidation Hardening Impregnations	4	
23.15.21.23.13	Impregnations Protecting from Biological Attack	4	
23.15.21.23.13.11	Wood Treatment Protecting from Biological Attack	5	
23.15.21.23.15	Impregnations Protecting from Fire	4	
23.15.21.23.15.11	Wood Treatment Protecting from Fire	5	
23.15.21.23.15.11.11	Fire Retardant Treatment	6	
23.15.21.23.17	Water Repellents	4	
23.15.21.23.17.11	Acrylic Water Repellents	5	
23.15.21.23.17.13	Silane Water Repellents	5	
23.15.21.23.17.15	Silicone Water Repellents	5	
23.15.21.23.17.17	Siloxane Water Repellents	5	
23.15.21.23.17.19	Stearate Water Repellents	5	
23.17.00.00	"Openings, Passages, and Protection Products"	1	
23.17.11.00	Doors	2	
23.17.11.11	Door Components?	3	
23.17.11.11.11	Door Frames	4	
23.17.11.11.13	Preassembled Door and Frame Units	4	
23.17.11.11.15	Door Fanlights	4	
23.17.11.11.17	Door Sections	4	
23.17.11.11.17.11	Structural Door Sections	5	
23.17.11.11.17.13	Door Cladding Sections	5	
23.17.11.11.19	Door Linings and Boards	4	
23.17.11.11.21	Door Renovation Sets	4	
23.17.11.11.23	Door Sidelites	4	
23.17.11.11.25	Door Accessories	4	
23.17.11.11.25.11	Door Peep Holes	5	
23.17.11.11.25.13	Door Buffers	5	
23.17.11.11.25.15	Door Stops	5	
23.17.11.11.25.17	Door Mail Openings	5	
23.17.11.11.25.19	Door Mail Slots	5	
23.17.11.11.25.21	Door Louvers	5	
23.17.11.11.25.23	Door Lights	5	
23.17.11.13	Metal Doors	3	
23.17.11.13.11	Hollow Metal Doors	4	
23.17.11.13.13	Aluminum Doors	4	
23.17.11.13.13.11	Aluminum Screen Doors	5	
23.17.11.13.13.13	Aluminum Storm Doors	5	
23.17.11.13.15	Steel Doors	4	
23.17.11.13.15.11	Steel Screen Doors	5	
23.17.11.13.15.13	Steel Storm Doors	5	
23.17.11.13.17	Bronze Doors	4	
23.17.11.13.19	Sliding Metal Doors	4	
23.17.11.13.21	Folding Metal Doors	4	
23.17.11.13.23	Revolving Metal Doors	4	
23.17.11.13.25	Overhead Metal Doors	4	
23.17.11.13.25.11	Roller Shutter Overhead Metal Doors	5	
23.17.11.13.25.13	Sectional Overhead Metal Doors	5	
23.17.11.15	Wood Doors	3	
23.17.11.15.11	Carved Wood Doors	4	
23.17.11.15.13	Flush Wood Doors	4	
23.17.11.15.15	Clad Wood Doors	4	
23.17.11.15.17	Prefinished Wood Doors	4	
23.17.11.15.19	Stile and Rail Wood Doors	4	
23.17.11.15.21	Wood Storm Doors	4	
23.17.11.15.23	Wood Screen Doors	4	
23.17.11.15.25	Sliding Wood Doors	4	
23.17.11.15.27	Folding Wood Doors	4	
23.17.11.15.29	Revolving Wood Doors	4	
23.17.11.15.31	Overhead Wood Doors	4	
23.17.11.15.31.11	Roller Shutter Overhead Wood Doors	5	
23.17.11.15.31.13	Sectional Overhead Wood Doors	5	
23.17.11.17	Plastic Doors	3	
23.17.11.17.11	Laminated Plastic Doors	4	
23.17.11.17.13	Solid Plastic Doors	4	
23.17.11.17.15	Plastic Storm Doors	4	
23.17.11.17.17	Plastic Screen Doors	4	
23.17.11.17.19	Sliding Plastic Doors	4	
23.17.11.17.21	Folding Plastic Doors	4	
23.17.11.17.23	Revolving Plastic Doors	4	
23.17.11.17.25	Overhead Plastic Doors	4	
23.17.11.17.25.11	Roller Shutter Overhead Plastic Doors	5	
23.17.11.17.25.13	Sectional Overhead Plastic Doors	5	
23.17.11.19	Composite Doors	3	
23.17.11.19.11	Fiberglass Composite Doors	4	
23.17.11.19.13	Sliding Composite Doors	4	
23.17.11.19.15	Folding Composite Doors	4	
23.17.11.19.17	Composite Hinged Doors	4	
23.17.11.19.19	Revolving Composite Doors	4	
23.17.11.19.21	Overhead Composite Doors	4	
23.17.11.19.21.11	Roller Shutter Overhead Composite Doors	5	
23.17.11.19.21.13	Sectional Overhead Composite Doors	5	
23.17.11.21	Glazed Doors	3	
23.17.11.21.11	Glazed Hinged Doors	4	
23.17.11.23	All Glass Doors	3	
23.17.11.23.11	Swinging All Glass Doors	4	
23.17.11.23.13	Sliding All Glass Doors	4	
23.17.11.23.15	Folding All Glass Doors and Grilles	4	
23.17.11.23.15.11	Accordion Folding All Glass Doors	5	
23.17.11.23.15.13	Panel Folding All Glass Doors	5	
23.17.11.23.15.15	Bifold All Glass Doors	5	
23.17.11.23.17	Revolving All Glass Doors	4	
23.17.11.23.19	Balanced All Glass Doors	4	
23.17.11.25	Passage Grilles	3	
23.17.11.25.11	Sliding Passage Grilles	4	
23.17.11.25.13	Folding Passage Grilles	4	
23.17.11.25.13.11	Accordion Folding Passage Grilles	5	
23.17.11.25.15	Rolling Grilles	4	
23.17.11.27	Access Doors	3	
23.17.11.27.11	Trap Doors	4	
23.17.11.27.13	Access Doors	4	
23.17.11.27.15	Floor Hatches	4	
23.17.11.27.17	Roof Hatches	4	
23.17.11.27.19	Security Floor Hatches	4	
23.17.11.27.21	Security Roof Hatches	4	
23.17.11.27.21.11	Forced Entry and Ballistic Resistant Roof Hatches	5	
23.17.11.27.21.13	Ballistic Resistant Roof Hatches	5	
23.17.11.27.23	Man Hole Accesses	4	
23.17.11.29	Access Panels	3	
23.17.11.29.11	Equipment Access Panels	4	
23.17.11.31	Fire Doors	3	
23.17.11.31.11	Fire Rated Doors	4	
23.17.11.31.11.11	Fire Rated Overhead Doors	5	
23.17.11.31.11.13	Fire Rated Rolling Doors	5	
23.17.11.31.11.15	Fire Rated Sliding Doors	5	
23.17.11.31.11.17	Fire Rated Hinged Doors	5	
23.17.11.31.11.19	Fire Rated Revolving Doors	5	
23.17.11.31.13	Temperature Rate of Rise Fire Rated Doors	4	
23.17.11.31.13.11	Temperature Rate of Rise Fire Rated Overhead Doors	5	
23.17.11.31.13.13	Temperature Rate of Rise Fire Rated Rolling Doors	5	
23.17.11.31.13.15	Temperature Rate of Rise Fire Rated Sliding Doors	5	
23.17.11.31.13.17	Temperature Rate of Rise Fire Rated Hinged Doors	5	
23.17.11.31.13.19	Temperature Rate of Rise Fire Rated Revolving Doors	5	
23.17.11.35	Fire Shutters	3	
23.17.11.37	Controlled Environment Doors	3	
23.17.11.37.11	Cold Storage Doors	4	
23.17.11.37.13	Sound Control Doors	4	
23.17.11.37.15	Radiation Protection Doors	4	
23.17.11.37.15.11	Electromagnetic Shielding Doors	5	
23.17.11.37.15.13	Radio Frequency Protection Doors	5	
23.17.11.37.15.15	BO Shielding Doors	5	
23.17.11.37.15.17	X Ray Protection Doors	5	
23.17.11.37.15.19	Nuclear Radiation Protection Doors	5	
23.17.11.37.15.21	High Energy Magnetic Pulse Protection Doors	5	
23.17.11.39	Detention Doors	3	
23.17.11.41	Hanger Doors	3	
23.17.11.43	Lightproof Doors	3	
23.17.11.43.11	Revolving Darkroom Door	4	
23.17.11.45	Traffic Doors	3	
23.17.11.45.11	Flexible Traffic Doors	4	
23.17.11.45.13	Flexible Strip Doors	4	
23.17.11.45.15	Rigid Panel Traffic Doors	4	
23.17.11.45.17	Rapid Opening Doors	4	
23.17.11.47	Pressure Resistant Doors	3	
23.17.11.47.11	Airtight Doors	4	
23.17.11.47.13	Watertight Doors	4	
23.17.11.49	Security Rated Door	3	
23.17.11.49.11	Blast Resistant Doors	4	
23.17.11.49.13	Forced Entry Door	4	
23.17.11.49.13.11	Multi Forced Entry Lock Door	5	
23.17.11.49.13.13	Single Forced Entry Lock Door	5	
23.17.11.49.15	Forced Entry and Ballistic Resistant Door	4	
23.17.11.49.17	Ballistic Resistant Door	4	
23.17.13.00	Windows	2	
23.17.13.11	Window Components?	3	
23.17.13.11.11	Window Sections	4	
23.17.13.11.13	Window Linings and Boards	4	
23.17.13.11.15	Window Vents	4	
23.17.13.11.17	Window Frames	4	
23.17.13.11.19	Transoms	4	
23.17.13.11.21	Sidelites	4	
23.17.13.11.23	Retractable Screens	4	
23.17.13.13	Metal Windows	3	
23.17.13.13.11	Metal Fixed Windows	4	
23.17.13.13.13	Metal Horizontal Sliding Windows	4	
23.17.13.13.15	Metal Single Hung Windows	4	
23.17.13.13.17	Metal Double Hung Windows	4	
23.17.13.13.19	Metal Triple Hung Windows	4	
23.17.13.13.21	Metal Awning Windows	4	
23.17.13.13.23	Metal Casement Windows	4	
23.17.13.13.25	Metal Hopper Windows	4	
23.17.13.13.27	Metal Vertical Pivoted Windows	4	
23.17.13.13.29	Metal Jalousie Windows	4	
23.17.13.15	Wood Windows	3	
23.17.13.15.11	Wood Fixed Windows	4	
23.17.13.15.13	Wood Horizontal Sliding Windows	4	
23.17.13.15.15	Wood Single Hung Windows	4	
23.17.13.15.17	Wood Double Hung Windows	4	
23.17.13.15.19	Wood Triple Hung Windows	4	
23.17.13.15.21	Wood Awning Windows	4	
23.17.13.15.23	Wood Casement Windows	4	
23.17.13.15.25	Wood Hopper Windows	4	
23.17.13.15.27	Wood Vertical Pivoted Windows	4	
23.17.13.15.29	Wood Jalousie Windows	4	
23.17.13.17	Plastic Windows	3	
23.17.13.17.11	Plastic Fixed Windows	4	
23.17.13.17.13	Plastic Horizontal Sliding Windows	4	
23.17.13.17.15	Plastic Single Hung Windows	4	
23.17.13.17.17	Plastic Double Hung Windows	4	
23.17.13.17.19	Plastic Triple Hung Windows	4	
23.17.13.17.21	Plastic Awning Windows	4	
23.17.13.17.23	Plastic Casement Windows	4	
23.17.13.17.25	Plastic Hopper Windows	4	
23.17.13.17.27	Plastic Vertical Pivoted Windows	4	
23.17.13.17.29	Plastic Jalousie Windows	4	
23.17.13.17.31	Plastic Jalousie Awning Windows	4	
23.17.13.19	Composite Windows	3	
23.17.13.19.11	Composite Fixed Windows	4	
23.17.13.19.13	Composite Horizontal Sliding Windows	4	
23.17.13.19.15	Composite Single Hung Windows	4	
23.17.13.19.17	Composite Double Hung Windows	4	
23.17.13.19.19	Composite Triple Hung Windows	4	
23.17.13.19.21	Composite Awning Windows	4	
23.17.13.19.23	Composite Casement Windows	4	
23.17.13.19.25	Composite Hopper Windows	4	
23.17.13.19.27	Composite Vertical Pivoted Windows	4	
23.17.13.19.29	Composite Jalousie Windows	4	
23.17.13.19.31	Composite Jalousie Awning Windows	4	
23.17.13.21	Projecting Windows	3	
23.17.13.21.11	Bay Windows	4	
23.17.13.21.11.11	Angles Bay Windows	5	
23.17.13.21.11.13	Box Bay Windows	5	
23.17.13.21.13	Bow Windows	4	
23.17.13.23	Roof Windows	3	
23.17.13.25	Masonry Windows	3	
23.17.13.25.11	Glass Masonry Unit Windows	4	
23.17.13.27	Special Purpose Windows	3	
23.17.13.27.11	Fire Rated Windows	4	
23.17.13.27.13	Detention Windows	4	
23.17.13.27.15	Pass Windows	4	
23.17.13.27.17	Controlled Environment Windows	4	
23.17.13.27.17.11	Sound Control Windows	5	
23.17.13.27.17.13	Radiation Protection Windows	5	
23.17.13.27.17.13.11	Electromagnetic Shielding Windows	6	
23.17.13.27.17.13.13	BO Shielding Windows	6	
23.17.13.27.17.13.15	Radio Frequency Protection Windows	6	
23.17.13.27.17.13.17	X Ray Protection Windows	6	
23.17.13.27.17.13.19	Nuclear Radiation Protection Windows	6	
23.17.13.27.17.13.21	High Energy Magnetic Pulse Protection Windows	6	
23.17.13.29	Security Windows	3	
23.17.13.29.11	Ballistic Resistant Windows	4	
23.17.13.29.11.11	Teller Forced Entry and Ballistic Resistant Windows	5	
23.17.13.29.13	Blast Resistant Windows	4	
23.17.13.29.13.11	Blast Resistant Structural Muntin Windows	5	
23.17.13.29.13.13	Blast Resistant Window Frames	5	
23.17.13.29.15	Impact Resistant Windows	4	
23.17.13.29.17	Forced Entry Resistant Windows	4	
23.17.13.29.19	Radio Frequency Shielding Windows	4	
23.17.13.29.21	Security Window Films	4	
23.17.13.29.21.11	Shatter Resistant Security Window Films	5	
23.17.13.29.23	Security Window Curtains	4	
23.17.13.29.23.11	Security Window Blast Curtains	5	
23.17.15.00	Glazing	2	
23.17.15.11	Glass Glazing 	3	
23.17.15.11.11	Bent Glass	4	
23.17.15.11.13	Chemically Strengthened Glass 	4	
23.17.15.11.15	Coated Glass 	4	
23.17.15.11.17	Composite Glass 	4	
23.17.15.11.19	Decorative Glass 	4	
23.17.15.11.21	Fire Rated Glass	4	
23.17.15.11.23	Float Glass 	4	
23.17.15.11.25	Heat Strengthened Glass 	4	
23.17.15.11.27	Impact Resistant Glass 	4	
23.17.15.11.29	Insulating Glass 	4	
23.17.15.11.31	Laminated Glass 	4	
23.17.15.11.33	Low Emissivity Glass	4	
23.17.15.11.35	Rolled Glass 	4	
23.17.15.11.37	Spandrel Glass 	4	
23.17.15.11.39	Tempered Glass	4	
23.17.15.11.41	Wired Glass 	4	
23.17.15.13	Plastic Glazing	3	
23.17.15.13.11	Ballistics Resistant Plastic Glazing	4	
23.17.15.13.13	Decorative Plastic Glazing	4	
23.17.15.13.15	Insulating Plastic Glazing	4	
23.17.15.13.17	Translucent Plastic Glazing	4	
23.17.15.13.19	Transparent Plastic Glazing	4	
23.17.15.15	Security Glass	3	
23.17.15.15.11	Laminated Security Glass	4	
23.17.15.17	Tinted Glass	3	
23.17.15.19	Glazing by Special Function	3	
23.17.15.19.11	Security Glazing	4	
23.17.15.19.13	Ballistics Resistant Glass Glazing	4	
23.17.15.19.15	Pressure Resistant Glazing	4	
23.17.15.19.17	Hurricane Resistant Glazing	4	
23.17.15.19.19	Radiation Resistant Glazing	4	
23.17.15.19.21	Switchable Privacy Glass	4	
23.17.15.21	Glazing Components?	3	
23.17.15.21.11	Glazing Frames	4	
23.17.15.21.13	Glazing Sections	4	
23.17.15.21.15	Mechanical Glazing Fasteners	4	
23.17.15.23	Glazing Accessories	3	
23.17.15.23.11	Glazing Beads	4	
23.17.15.23.13	Condensation Channels	4	
23.17.15.23.15	Glazing Sealants and Tapes	4	
23.17.15.23.17	Glazing Gaskets	4	
23.17.15.23.19	Glazing Leading Material	4	
23.17.15.25	Protective Films	3	
23.17.15.25.11	Solar Control Films	4	
23.17.15.25.13	Safety Films	4	
23.17.15.25.15	Security Films	4	
23.17.15.25.17	Decorative Films	4	
23.17.17.00	Skylights 	2	
23.17.17.11	Skylight Components?	3	
23.17.17.11.11	Skylight Hardware	4	
23.17.17.13	Unit Skylights	3	
23.17.17.13.11	Domed Unit Skylights	4	
23.17.17.13.13	Pyramidal Unit Skylights	4	
23.17.17.13.15	Vaulted Unit Skylights	4	
23.17.17.13.17	Single Slope Unit Skylights	4	
23.17.17.13.19	Octagonal Unit Skylights	4	
23.17.17.13.21	Tubular Skylights	4	
23.17.17.15	Metal Framed Skylights	3	
23.17.17.15.11	Domed Metal Framed Skylights	4	
23.17.17.15.13	Pyramidal Metal Framed Skylights	4	
23.17.17.15.15	Ridge Metal Framed Skylights	4	
23.17.17.15.17	Vaulted Metal Framed Skylights	4	
23.17.17.15.19	Single Slope Metal Framed Skylights	4	
23.17.17.15.21	Octagonal Metal Framed Skylights	4	
23.17.19.00	Hardware for Openings	2	
23.17.19.11	Hardware for Doors	3	
23.17.19.11.11	"Rotation, Pivoting Door Gear"	4	
23.17.19.11.13	Sliding Door Gear	4	
23.17.19.11.15	Door Guiding Hardware	4	
23.17.19.11.17	Door Holding Hardware	4	
23.17.19.11.17.11	Door Hold Open Hardware	5	
23.17.19.11.19	Door Closing Hardware	4	
23.17.19.11.19.11	Door Closers	5	
23.17.19.11.19.11.11	Manual Floor Door Closers	6	
23.17.19.11.19.11.13	Manual Surface Door Closers	6	
23.17.19.11.19.11.15	Manual Concealed Overhead Door Closers	6	
23.17.19.11.19.11.17	Power Operator Floor Door Closers	6	
23.17.19.11.19.11.19	Power Operator Surface Door Closers	6	
23.17.19.11.19.11.21	Power Operator Concealed Overhead Door Closers	6	
23.17.19.11.21	Door Barrier Locks	4	
23.17.19.11.21.11	Door Deadbolt Locks	5	
23.17.19.11.21.13	Door Chains	5	
23.17.19.11.21.15	Door Electric Strike Locks	5	
23.17.19.11.21.17	Door Electromagnetic Locks	5	
23.17.19.11.21.17.11	Door Time Locks	6	
23.17.19.11.21.17.13	Door Time Delay Combination Locks	6	
23.17.19.11.21.19	Door Latches	5	
23.17.19.11.21.21	Door Mortise Locks	5	
23.17.19.11.21.21.11	Door Electric Mortise Locks	6	
23.17.19.11.21.21.13	Door Electronic Mortise Locks	6	
23.17.19.11.21.23	Door Pin Tumbler Locks	5	
23.17.19.11.21.23.11	Door Tubular Pin Tumbler Locks	6	
23.17.19.11.21.25	Door Flush Bolts	5	
23.17.19.11.23	Door Cores	4	
23.17.19.11.25	Door Cylinders	4	
23.17.19.11.27	Door Key Control Systems	4	
23.17.19.11.29	Personnel Door Access	4	
23.17.19.11.29.11	Door Position Switches	5	
23.17.19.11.29.13	Door Emergency Exit Panic Bars	5	
23.17.19.11.29.15	Door End of Line Devices	5	
23.17.19.11.29.17	Door Request to Exit Switches	5	
23.17.19.11.29.19	Personnel Access Door Keypads	5	
23.17.19.11.29.19.11	Door Infrared Request to Exit Switches	6	
23.17.19.11.31	Automatic Door Controls and Operators	4	
23.17.19.11.31.11	Card Key Door Locking Hardware	5	
23.17.19.11.31.13	Electrical Door Locking Control	5	
23.17.19.11.31.15	Electromagnetic Door Holders	5	
23.17.19.11.31.17	Sensors for Automatic Doors	5	
23.17.19.11.33	Door Exiting Hardware	4	
23.17.19.13	Hardware for Windows	3	
23.17.19.13.11	Sliding Window Gear	4	
23.17.19.13.11.11	Horizontal Sliding Window Gear	5	
23.17.19.13.11.13	Vertical Sliding Window Gear	5	
23.17.19.13.13	Horizontal Pivoting Window Gear	4	
23.17.19.13.15	Window Tilt and Turn Gear	4	
23.17.19.13.17	Louver Gear	4	
23.17.19.13.19	Automatic Window Equipment	4	
23.17.19.13.21	Window Barrier Locks	4	
23.17.19.13.21.11	Window Deadbolt Locks	5	
23.17.19.13.21.13	Window Latches	5	
23.17.19.13.21.15	Window Mortise Locks	5	
23.17.19.13.21.17	Window Flush Bolts	5	
23.17.19.13.23	Window Lifts	4	
23.17.19.13.25	Window Operators	4	
23.17.19.13.25.11	Manual Surface Window Closers	5	
23.17.19.13.25.13.11	Manual Concealed Overhead Window Closers	6	
23.17.19.13.25.15.11	Power Operator Surface Window Closers	6	
23.17.19.13.25.17.11	Power Operator Concealed Overhead Window Closers	6	
23.17.19.15	Weatherstripping and Seals	3	
23.17.19.15.11	Door Weatherstripping and Seals	4	
23.17.19.15.11.11	Acoustic Seals	5	
23.17.19.15.11.13	Astragals	5	
23.17.19.15.11.15	Perimeter Gasketing	5	
23.17.19.15.13	Thresholds	4	
23.17.19.15.15	Window Weatherstripping and Seals	4	
23.17.19.17	Other Openings Hardware	3	
23.17.19.17.11	Door Stops	4	
23.17.21.00	Protection of Openings	2	
23.17.21.11	Exterior Protection of Openings	3	
23.17.21.11.11	Projecting Screens	4	
23.17.21.11.11.11	Solid Canopies	5	
23.17.21.11.11.13	Louvered Canopies	5	
23.17.21.11.11.15	Solid Vertical Fins	5	
23.17.21.11.11.17	Louvered Vertical Fins	5	
23.17.21.11.11.19	Manual Awnings	5	
23.17.21.11.11.21	Powered Awnings	5	
23.17.21.11.13	Exterior Shutters	4	
23.17.21.11.13.11	Folding Exterior Shutters	5	
23.17.21.11.13.13	Shutter Components?	5	
23.17.21.11.13.13.11	Roller Shutter Gear	6	
23.17.21.11.13.13.13	Roller Shutter Sections	6	
23.17.21.11.13.13.15	Roller Shutter Casings	6	
23.17.21.11.13.15	Sliding Exterior Shutters	5	
23.17.21.11.13.17	Swinging Exterior Shutters	5	
23.17.21.11.13.19	Coiling Exterior Shutters	5	
23.17.21.11.15	Exterior Louvers and Grilles	4	
23.17.21.11.15.11	Fixed Exterior Louvers and Grilles	5	
23.17.21.11.15.13	Roller Exterior Louvers and Grilles	5	
23.17.21.11.15.15	Sliding Exterior Louvers and Grilles	5	
23.17.21.11.17	Storm Panels	4	
23.17.21.11.17.11	Demountable Storm Panels	5	
23.17.21.11.17.13	Movable Storm Panels	5	
23.17.21.13	Interior Window Treatment	3	
23.17.21.13.11	Window Blinds	4	
23.17.21.13.11.11	Horizontal Window Blinds	5	
23.17.21.13.11.13	Vertical Window Blinds	5	
23.17.21.13.11.15	Window Blind Components	5	
23.17.21.13.11.15.11	Window Slats	6	
23.17.21.13.11.15.13	Window Vanes	6	
23.17.21.13.11.15.15	Blinds Hardware	6	
23.17.21.13.13	Curtains and Drapes	4	
23.17.21.13.13.11	Drapery Tracks	5	
23.17.21.13.15	Window Interior Shutters	4	
23.17.21.13.17	Window Shades	4	
23.17.21.13.17.11	Cellular/Pleated Shades	5	
23.17.21.13.17.13	Roller Shades	5	
23.17.21.15	Fire and Smoke Shutters and Curtains	3	
23.17.21.15.11	Fire Shutters	4	
23.17.21.15.11.11	Vertical Fire Shutters	5	
23.17.21.15.11.13	Horizontal Fire Shutters	5	
23.17.21.15.13	Smoke Curtains 	4	
23.17.21.15.13.11	Water Spray Smoke Curtains	5	
23.17.21.15.15	Smoke Shutters	4	
23.17.21.17	Insect Screens	3	
23.17.21.17.11	Complete Insect Screens	4	
23.17.21.17.13	Components?	4	
23.17.21.17.13.11	Frames for Insect Screens	5	
23.17.21.17.13.13	Mesh for Insect Screens	5	
23.17.23.00	Circulation and Escape Products	2	
23.17.23.11	Ramps	3	
23.17.23.13	Walkways	3	
23.17.23.15	Ladders	3	
23.17.23.15.11	Ladder Component Products	4	
23.17.23.15.11.11	Ladder Hardware	5	
23.17.23.15.11.13	Rungs	5	
23.17.23.15.13	Vertical Ladders	4	
23.17.23.15.15	Ship Ladders	4	
23.17.23.17	Stairs	3	
23.17.23.17.11	Stair Component Products	4	
23.17.23.17.11.11	Stair Treads	5	
23.17.23.17.11.13	Stair Nosings	5	
23.17.23.17.11.15	Stair Tread Coverings	5	
23.17.23.17.11.17	Stair Railings	5	
23.17.23.17.11.19	Stair Handrails	5	
23.17.23.17.11.21	Stair Barrier Gates	5	
23.17.23.17.13	Spiral Stairs	4	
23.17.23.17.13.11	Metal Spiral Stairs	5	
23.17.23.17.13.13	Wood Spiral Stairs	5	
23.17.23.17.15	Retractable Stairs	4	
23.17.23.19	Fire Escapes	3	
23.17.23.19.11	"Escape Ladders, Stairs"	4	
23.17.23.19.11.11	Fire Escapes	5	
23.17.23.19.13	Escape Slides	4	
23.17.23.21	Evacuation Equipment	3	
23.17.23.21.11	Evacuation Slings	4	
23.17.23.21.13	Evacuation Chairs	4	
23.17.25.00	Circulation Guiding and Protection Products	2	
23.17.25.11	Guardrails	3	
23.17.25.11.11	Guardrail Component Products	4	
23.17.25.11.11.11	Cable Infill Systems	5	
23.17.25.11.11.13	Infill Panels	5	
23.17.25.11.11.15	"Posts, Newel Posts, Pickets"	5	
23.17.25.11.11.17	Railing	5	
23.17.25.13	Handrails	3	
23.17.25.13.11	Rope Handrails	4	
23.17.25.13.13	Capping	4	
23.17.25.13.15	Chain Handrails	4	
23.17.25.15	Impact Protection Products	3	
23.17.25.15.11	Impact Guard Rails	4	
23.17.25.15.11.11	Bumper Guards	5	
23.17.25.15.13	Corner Guards	4	
23.17.25.15.15	Column Protectors	4	
23.17.25.15.17	Door and Wall Protector Products	4	
23.17.25.15.17.11	Impact Resistant Wall Protection Products	5	
23.19.00.00	Specialty Products	1	
23.19.11.00	Information Display Specialties	2	
23.19.11.11	Information Signs	3	
23.19.11.13	Display Lettering	3	
23.19.11.15	Display Numerals	3	
23.19.11.17	Notice Boards	3	
23.19.11.19	Writing Boards	3	
23.19.11.19.11	Interactive Multi Media Whiteboards	4	
23.19.11.19.13	Chalk Boards	4	
23.19.11.19.15	Dry Erase Boards	4	
23.19.11.19.17	Drawing Boards	4	
23.19.11.21	Plaques	3	
23.19.11.23	Poster Display Units	3	
23.19.11.25	Display Screens	3	
23.19.11.27	Pictograms	3	
23.19.11.29	Directory Boards	3	
23.19.11.31	Electronic Copy Boards	3	
23.19.11.33	Magnetic Boards	3	
23.19.13.00	Lockers	2	
23.19.13.11	Metal Lockers	3	
23.19.13.13	Plastic Laminate Lockers	3	
23.19.13.15	Solid Core Lockers	3	
23.19.15.00	Communication Specialties	2	
23.19.15.11	Mail Boxes	3	
23.19.15.13	Mail Racks	3	
23.19.15.15	Pigeonholes	3	
23.19.15.17	Mail Trolleys	3	
23.19.15.19	Mail Handling Equipment	3	
23.19.15.21	Telephone Booths	3	
23.19.17.00	Fireplaces	2	
23.19.17.11	Electric Fireplace	3	
23.19.17.13	Fuel Oil Fireplace	3	
23.19.17.15	Gas Fireplace	3	
23.19.17.17	Solid Fuel Fireplace	3	
23.19.17.19	Fireplace Doors	3	
23.19.17.21	Fireplace Water Heaters	3	
23.19.19.00	Flue and Chimney Products	2	
23.19.19.11	Complete Flue and Chimney Systems	3	
23.19.19.11.11	Chimney Gas Vents	4	
23.19.19.11.13	Fabricated Stacks	4	
23.19.19.11.15	Fabricated Breechings and Accessories	4	
23.19.19.11.17	Insulated Sectional Chimneys	4	
23.19.19.13	Fireplace Ductwork	3	
23.19.19.13.11	Fireplace B Vent Ductwork	4	
23.19.19.13.13	Fireplace Direct Vent Ductwork	4	
23.19.19.13.15	Fireplace Free Vent Ductwork	4	
23.19.19.13.17	Fireplace Tri Wall Vent Ductwork	4	
23.19.19.13.19	Fireplace Dampers	4	
23.19.19.15	Flue and Chimney Systems Components	3	
23.19.19.15.11	Draft Control Devices	4	
23.19.19.15.13	Fireplace Lintels	4	
23.19.19.15.15	Flue Linings	4	
23.19.19.15.17	Flue Caps	4	
23.19.19.15.19	Flue Cowls	4	
23.19.19.15.21	Chimney Dampers	4	
23.19.19.15.23	Fire Shutter Extinguishers	4	
23.19.19.15.25	Flue Gas Purifiers	4	
23.19.21.00	Hearths	2	
23.19.23.00	Kilns	2	
23.19.25.00	Pest Control Devices	2	
23.19.25.11	Bird Control Devices	3	
23.19.25.11.11	Roost Inhibitors	4	
23.19.25.11.11.11	Bird Wire	5	
23.19.25.11.11.13	Bird Spikes	5	
23.19.25.11.11.15	Bird Netting	5	
23.19.25.11.13	Bird Flight Diverters	4	
23.19.25.11.15	Bird Repellant Devices	4	
23.19.25.11.15.11	Sonic Repellant Devices	5	
23.19.25.11.15.13	Ultra Sonic Repellant Devices	5	
23.19.25.11.15.15	Visual Devices	5	
23.19.25.11.17	Bird Attractors	4	
23.19.25.11.19	Bird Control Accessories	4	
23.19.25.11.19.11	Mounting Clips	5	
23.19.25.11.19.13	Extension Speakers	5	
23.19.25.11.19.15	Solar Panels	5	
23.19.25.11.19.17	Spikes Adhesives	5	
23.19.25.11.19.19	Foot Pumps	5	
23.19.25.11.19.21	Caulking Guns	5	
23.19.25.13	Insect Control Devices	3	
23.19.25.13.11	Electronic Insect Repellers	4	
23.19.25.13.11.11	Automatic Misting Systems	5	
23.19.25.13.11.13	Vacuum System s	5	
23.19.25.13.11.15	Sonic Repellers	5	
23.19.25.13.11.17	Ultrasonic Repellers	5	
23.19.25.13.11.19	Electromagnetic Repellers	5	
23.19.25.13.13	Fly Traps	4	
23.19.25.13.15	Screens	4	
23.19.25.13.17	Foam Sealants	4	
23.19.25.13.19	Fly Boards	4	
23.19.25.13.21	Insect Control Accessories	4	
23.19.25.13.21.11	Nozzles	5	
23.19.25.13.21.13	Tubing	5	
23.19.25.13.21.15	Risers	5	
23.19.25.13.21.17	Fittings	5	
23.19.25.13.21.19	Remote Controls	5	
23.19.25.15	Rodent Control Devices	3	
23.19.25.15.11	Traps	4	
23.19.25.15.11.11	Snap Traps	5	
23.19.25.15.11.13	Glue Traps	5	
23.19.25.15.11.15	Sticky Traps	5	
23.19.25.15.11.17	Electronic Traps	5	
23.19.25.15.13	Ultrasonic Rodent Control Devices	4	
23.19.25.15.15	Electronic Rodent Control Devices	4	
23.19.25.15.17	Proofing Devices	4	
23.19.25.15.19	Tracking Products	4	
23.19.25.15.21	Spray Devices	4	
23.19.25.15.23	Rodent Control Accessories	4	
23.19.27.00	Manufactured Exterior Specialties	2	
23.19.27.11	Weathervanes	3	
23.19.27.13	Clocks	3	
23.19.27.15	Cupolas	3	
23.19.27.17	Spires	3	
23.19.27.19	Steeples	3	
23.19.27.21	Towers	3	
23.19.27.23	Industrial Breechings	3	
23.19.27.23.11	Industrial Breechings	4	
23.19.27.23.13	Fabricated Industrial Breechings	4	
23.19.27.23.15	Fabricated Industrial Breechings Accessories	4	
23.19.27.25	Industrial Chimneys	3	
23.19.27.25.11	Industrial Chimney Shafts	4	
23.19.27.25.13	Industrial Chimney Linings	4	
23.19.27.25.15	Industrial Chimney Draft Control Devices	4	
23.19.27.25.17	Industrial Insulated Sectional Chimneys	4	
23.19.27.27	Industrial Stacks	3	
23.19.29.00	Complete Buildings	2	
23.19.29.11	Pre Engineered Structures	3	
23.19.29.11.11	Pre Engineered Structure Component	4	
23.19.29.11.11.11	Lift Shaft Components	5	
23.19.29.11.13	Framed Pre Engineered Buildings	4	
23.19.29.11.15	Panel Structure Pre Engineered Buildings	4	
23.19.29.11.17	Cubicle Structure Pre Engineered Buildings	4	
23.19.29.11.19	Air Supported Pre Engineered Buildings	4	
23.19.29.11.21	Cable Supported Pre Engineered Buildings	4	
23.19.29.11.23	Fabric Pre Engineered Building Structures	4	
23.19.29.11.25	Prefabricated Dome Structures	4	
23.19.29.11.27	Portable Buildings	4	
23.19.29.11.29	Mobile Buildings	4	
23.19.29.13	Covers and Shelters	3	
23.19.29.13.11	General Purpose Shelters	4	
23.19.29.13.13	Shelters for Public Transport	4	
23.19.29.13.13.11	Bus Stop Shelters	5	
23.19.29.13.13.13	Train Platform Shelters	5	
23.19.29.13.15	Walkway Coverings	4	
23.19.29.13.17	Shelters for Civil Protection	4	
23.19.29.13.19	Animal Shelters	4	
23.19.29.13.19.11	Kennels	5	
23.19.29.13.21	Car Shelters	4	
23.19.29.13.23	Shelters for Services	4	
23.19.29.13.25	Garden Umbrellas	4	
23.19.29.15	Special Purpose Buildings	3	
23.19.29.15.11	Observatories	4	
23.19.29.15.13	Control Booths	4	
23.19.29.15.15	Greenhouses	4	
23.19.29.15.15.11	Glazed Greenhouse Structures	5	
23.19.29.15.17	Summerhouses	4	
23.19.29.15.17.11	Gazebos	5	
23.19.29.15.17.13	Pavilions	5	
23.19.29.15.19	Kiosks	4	
23.19.29.15.21	Public Restrooms	4	
23.19.29.15.23	Sauna Buildings	4	
23.19.29.15.25	Funerary Construction Products	4	
23.19.29.15.25.11	Preassembled Mausoleums	5	
23.19.29.15.27	General Purpose Booths	4	
23.19.29.15.27.11	Ticket Booths	5	
23.19.29.15.27.13	Parking Attendant Booths	5	
23.19.29.15.27.15	Toll Booths	5	
23.19.29.15.27.17	Guard Booths	5	
23.19.29.15.27.19	Valet Booths	5	
23.19.29.17	Building Modules	3	
23.19.29.17.11	Prison Cells	4	
23.19.29.17.13	Hotel Rooms	4	
23.19.29.17.15	Dormitory Rooms	4	
23.19.29.19	Integrated Assemblies	3	
23.19.29.19.11	"Sound, Vibration and Seismic Control Products"	4	
23.19.29.19.11.11	Floating Floor Construction Products	5	
23.19.31.00	Room Units	2	
23.19.31.11	General Purpose Room Units	3	
23.19.31.11.11	Prefabricated General Purpose Rooms	4	
23.19.31.13	Storage Room Units	3	
23.19.31.15	Special Purpose Rooms	3	
23.19.31.15.11	Athletic Rooms	4	
23.19.31.15.11.11	Handball Racquetball Courts	5	
23.19.31.15.13	Conservatories	4	
23.19.31.15.13.11	Solarium Specialties	5	
23.19.31.15.15	Planetariums	4	
23.19.31.15.17	Saunas	4	
23.19.31.15.19	Steam Baths	4	
23.19.31.17	Sanitary Room Units 	3	
23.19.31.17.11	Bathroom Units	4	
23.19.31.17.13	Lavatory Units	4	
23.19.31.19	Controlled Environment Rooms	3	
23.19.31.19.11	Clean Rooms	4	
23.19.31.19.13	Insulated Rooms	4	
23.19.31.19.13.11	Cold Storage Rooms	5	
23.19.31.19.15	Sound Conditioned Rooms	4	
23.19.31.19.15.11	Practice Booths	5	
23.19.31.19.17	Hyperbaric Rooms	4	
23.19.31.19.19	Radiation Protected Rooms	4	
23.19.31.19.19.11	Electromagnetic Shielded Rooms	5	
23.19.31.19.19.13	RF Shielded Rooms	5	
23.19.31.19.19.15	BO Shielded Rooms	5	
23.19.31.19.19.17	Radio Frequency Protected Rooms	5	
23.19.31.19.19.19	X Ray Protected Rooms	5	
23.19.31.19.19.21	Nuclear Radiation Protected Rooms	5	
23.19.31.19.19.23	High Energy Magnetic Pulse Protected Rooms	5	
23.19.31.21	Plant and Control Room Units	3	
23.19.31.21.11	Plant Office Shelters and Booths	4	
23.19.31.23	Corridor Units	3	
23.21.00.00	"Furnishings, Fixtures and Equipment Products"	1	
23.21.11.00	Commercial Furniture	2	
23.21.11.11	Commercial Storage Units	3	
23.21.11.11.11	Commercial Storage Shelves	4	
23.21.11.11.13	Commercial Storage Supports	4	
23.21.11.11.15	Commercial Storage Racking	4	
23.21.11.11.17	Commercial Mobile Storage Units	4	
23.21.11.11.19	Commercial Filing Cabinets	4	
23.21.11.11.21	Architecture Plan Chests 	4	
23.21.11.11.23	Commercial Desks	4	
23.21.11.11.25	Commercial Bookcases	4	
23.21.11.11.27	Commercial Key Hangers	4	
23.21.13.00	Retail and Office Equipment and Furnishings	2	
23.21.13.11	Registration Equipment	3	
23.21.13.13	Checkroom Equipment	3	
23.21.13.15	Mercantile Equipment and Furnishings	3	
23.21.13.17	Barber Shop Equipment	3	
23.21.13.19	Beauty Shop Equipment	3	
23.21.13.21	Cash Registers	3	
23.21.13.23	Checkout Equipment	3	
23.21.13.25	Office Equipment 	3	
23.21.13.25.11	Drafting Equipment	4	
23.21.13.25.13	Plotters	4	
23.21.13.25.15	Drawing Equipment	4	
23.21.13.25.17	Office Accessories	4	
23.21.15.00	Wardrobe and Closet Specialties	2	
23.21.15.11	Wardrobes	3	
23.21.15.13	Chests of Drawers	3	
23.21.15.15	Clothing Lockers	3	
23.21.15.17	Clothing Racks	3	
23.21.15.17.11	Coat Racks	4	
23.21.15.17.13	Hat Racks	4	
23.21.15.19	Clothing Hangers	3	
23.21.15.19.11	Shoe Trees	4	
23.21.15.19.13	Coat Hooks	4	
23.21.15.19.15	Coat Hangers	4	
23.21.15.19.17	Coat Rails	4	
23.21.15.21	Cloakroom Units	3	
23.21.15.23	Umbrella Storage Stands	3	
23.21.15.25	Checkroom Equipment	3	
23.21.15.25.11	Manual Checkroom Equipment	4	
23.21.15.25.13	Automated Checkroom Equipment	4	
23.21.15.27	Clothing Shelving Units	3	
23.21.15.27.11	Clothing Shelves	4	
23.21.15.27.13	Clothing Shelving and Storage Units	4	
23.21.17.00	Interior Refuse Disposal Furniture	2	
23.21.17.11	Interior Waste Bins	3	
23.21.17.13	Interior Ash Trays	3	
23.21.17.15	Interior Refuse Holders	3	
23.21.19.00	Casework	2	
23.21.19.11	Modular General Casework	3	
23.21.19.11.11	Metal Modular General Casework	4	
23.21.19.11.13	Wood Modular General Casework	4	
23.21.19.11.15	Plastic Modular General Casework	4	
23.21.19.13	Custom General Casework	3	
23.21.19.15	Specialty Casework	3	
23.21.19.15.11	Bank Specialty Casework	4	
23.21.19.15.13	Hospitality Specialty Casework	4	
23.21.19.15.15	Medical Specialty Casework	4	
23.21.19.15.15.11	Hospital Specialty Casework	5	
23.21.19.15.15.13	Nurse Station Specialty Casework	5	
23.21.19.15.15.15	Exam Room Specialty Casework	5	
23.21.19.15.15.17	Dental Specialty Casework	5	
23.21.19.15.15.19	Pharmacy Specialty Casework	5	
23.21.19.15.17	Display Specialty Casework	4	
23.21.19.15.19	Religious Specialty Casework	4	
23.21.19.15.21	Library Specialty Casework	4	
23.21.19.15.21.11	Library Specialty Casework Study Carrels	5	
23.21.19.15.21.13	Library Specialty Casework Book Stacks	5	
23.21.19.15.21.15	Library Specialty Casework Periodical Racks	5	
23.21.19.15.23	Educational Specialty Casework	4	
23.21.19.15.23.11	Educational Specialty Casework Study Carrels	5	
23.21.19.15.25	Laboratory Specialty Casework	4	
23.21.19.15.25.11	Metal Laboratory Specialty Casework	5	
23.21.19.15.25.13	Plastic-Laminate-Clad Laboratory Specialty Casework	5	
23.21.19.15.25.15	Wood Laboratory Specialty Casework	5	
23.21.19.15.25.17	Solid-Plastic Laboratory Specialty Casework	5	
23.21.19.15.27	Mortuary Specialty Casework	4	
23.21.19.15.29	Commercial Kitchen Specialty Casework	4	
23.21.19.15.31	Darkroom Specialty Casework	4	
23.21.19.15.33	Residential Specialty Casework	4	
23.21.19.15.33.11	Residential Kitchen Specialty Casework	5	
23.21.19.15.33.13	Residential Bathroom Specialty Casework	5	
23.21.19.15.33.15	Residential Dormitory Specialty Casework	5	
23.21.19.15.35	Utility Room Specialty Casework	4	
23.21.19.15.39	Mailroom Casework	4	
23.21.19.17	Casework Components	3	
23.21.19.17.11	Casework Component Cabinets	4	
23.21.19.17.13	Casework Component Hardware	4	
23.21.19.17.15	Casework Component Work Surfaces	4	
23.21.21.00	Food Service Equipment and Furnishings	2	
23.21.21.11	Commercial Food Services Cabinets	3	
23.21.21.11.11	Commercial Hot Cabinets	4	
23.21.21.11.13	Commercial Cold Cabinets	4	
23.21.21.11.15	Commercial Combination Hot Cold Cabinets	4	
23.21.21.11.17	Commercial Pastry Cabinets	4	
23.21.21.11.19	Commercial Warming Cabinets	4	
23.21.21.11.21	Commercial Snack Cabinets	4	
23.21.21.13	Commercial Food Cooking Equipment	3	
23.21.21.13.11	Commercial Bain Maries	4	
23.21.21.13.13	Commercial Beverage Equipment	4	
23.21.21.13.13.11	Commercial Coffee Makers	5	
23.21.21.13.13.13	Commercial Coffee Warmers	5	
23.21.21.13.13.15	Commercial Iced Tea Makers	5	
23.21.21.13.15	Commercial Broilers	4	
23.21.21.13.15.11	Commercial Steam Broilers	5	
23.21.21.13.15.13	Commercial Infra Red Broilers	5	
23.21.21.13.15.15	Commercial Gas Broilers	5	
23.21.21.13.17	Commercial Food Cookers	4	
23.21.21.13.17.11	Commercial Food Induction Cookers	5	
23.21.21.13.17.13	Commercial Pasta Cookers	5	
23.21.21.13.17.15	Commercial Food Pressure Cookers	5	
23.21.21.13.17.17	Commercial Rice Cookers	5	
23.21.21.13.19	Commercial Crepe Machines	4	
23.21.21.13.21	Commercial Fryers	4	
23.21.21.13.21.11	Commercial Deep Fryers	5	
23.21.21.13.21.13	Commercial Pressure Fryers	5	
23.21.21.13.23	Commercial Frying Pans	4	
23.21.21.13.23.11	Commercial Tilting Frying Pans	5	
23.21.21.13.25	Commercial Griddles	4	
23.21.21.13.27	Commercial Grills	4	
23.21.21.13.27.11	Commercial Barbecue Grills	5	
23.21.21.13.27.13	Commercial Char Broiler Grills	5	
23.21.21.13.27.15	Commercial Hot Dog Grills	5	
23.21.21.13.29	Commercial Kettles	4	
23.21.21.13.29.11	Commercial Poacher Kettles	5	
23.21.21.13.29.13	Commercial Salmon Kettles	5	
23.21.21.13.31	Commercial Ovens	4	
23.21.21.13.31.11	Commercial Barbeque Ovens	5	
23.21.21.13.31.13	Commercial Combination Convection Ovens	5	
23.21.21.13.31.15	Commercial Convection Ovens	5	
23.21.21.13.31.17	Commercial Microwave Ovens	5	
23.21.21.13.31.19	Commercial Pastry Ovens	5	
23.21.21.13.31.21	Commercial Pizza Ovens	5	
23.21.21.13.31.23	Commercial Proofer Ovens	5	
23.21.21.13.31.25	Commercial Smoker Ovens	5	
23.21.21.13.33	Commercial Popcorn Machines	4	
23.21.21.13.35	Commercial Ranges	4	
23.21.21.13.37	Commercial Rotisseries	4	
23.21.21.13.39	Commercial Food Steamers	4	
23.21.21.13.39.11	Commercial High Pressure Food Steamer	5	
23.21.21.13.41	Commercial Skillets	4	
23.21.21.13.41.11	Commercial Tilt Skillets	5	
23.21.21.13.43	Commercial Stoves	4	
23.21.21.13.45	Commercial Toasters	4	
23.21.21.13.45.11	Commercial Toaster Conveyors	5	
23.21.21.13.47	Commercial Waffle Irons	4	
23.21.21.13.49	Commercial Small Specialized Cooking Equipment	4	
23.21.21.15	Commercial Food Services Warming Equipment	3	
23.21.21.15.11	Commercial Food Warmers	4	
23.21.21.15.13	Commercial Food Warmer Stations	4	
23.21.21.15.15	Commercial Hot Plates	4	
23.21.21.15.17	Commercial Steam Tables	4	
23.21.21.17	Commercial Food Services Cooling Equipment	3	
23.21.21.17.11	Commercial Refrigerated Tables	4	
23.21.21.19	Commercial Dishwasher Equipment	3	
23.21.21.19.11	Commercial Dishwashers	4	
23.21.21.19.11.11	Commercial Steam Dishwashers	5	
23.21.21.19.11.13	Commercial Dishwasher Conveyors	5	
23.21.21.19.11.15	Commercial Dishwasher Tray Conveyors	5	
23.21.21.21	Commercial Food Disposal Equipment	3	
23.21.21.21.11	Commercial Waste Disposal Units	4	
23.21.21.21.13	Commercial Garbage Disposals	4	
23.21.21.21.15	Commercial Garbage Pulpers	4	
23.21.21.23	Commercial Food Display Equipment	3	
23.21.21.23.11	Commercial Food Display Coolers	4	
23.21.21.23.11.11	Commercial Freezer Food Display Cases	5	
23.21.21.23.11.13	Commercial Heated Food Display Cases	5	
23.21.21.23.11.15	Commercial Refrigerated Food Display Cases	5	
23.21.21.23.11.17	Commercial Unconditioned Food Display Cases	5	
23.21.21.23.13	Commercial Food Guards	4	
23.21.21.25	Commercial Food and Beverage Dispensing Equipment	3	
23.21.21.25.11	Commercial Soda Fountain Equipment	4	
23.21.21.25.13	Commercial Bottled Water Dispensers	4	
23.21.21.25.15	Commercial Bowl and Plate Dispensers	4	
23.21.21.25.17	Commercial Bread Dispensers	4	
23.21.21.25.19	Commercial Cappuccino or Espresso Dispensers	4	
23.21.21.25.21	Commercial Carbonated Beverage Dispensers	4	
23.21.21.25.23	Commercial Coffee Dispensers	4	
23.21.21.25.25	Commercial Condiment Dispensers	4	
23.21.21.25.27	Commercial Cream Dispensers	4	
23.21.21.25.29	Commercial Cup Dispensers	4	
23.21.21.25.31	Commercial Cup and Saucer Dispensers	4	
23.21.21.25.33	Commercial Bubbler Dispensers	4	
23.21.21.25.35	Commercial Drinking Glass Dispensers	4	
23.21.21.25.37	Commercial Flatware Dispensers	4	
23.21.21.25.39	Commercial Hot Chocolate Dispensers	4	
23.21.21.25.41	Commercial Hot Water Dispensers	4	
23.21.21.25.43	Commercial Ice Cream Dispensers	4	
23.21.21.25.45	Commercial Milk Dispensers	4	
23.21.21.25.47	Commercial Milkshake Dispensers	4	
23.21.21.25.49	Commercial Non Carbonated Beverage Dispensers	4	
23.21.21.25.49.11	Commercial Refrigerated Non Carbonated Beverage Dispensers	5	
23.21.21.25.51	Commercial Plate Dispensers	4	
23.21.21.25.53	Commercial Saucer Dispensers	4	
23.21.21.25.55	Commercial Slush Dispensers	4	
23.21.21.25.57	Commercial Soft Serve Ice Cream Dispensers	4	
23.21.21.25.59	Commercial Syrup Pump Dispensers	4	
23.21.21.25.61	Commercial Tray Dispensers	4	
23.21.21.25.63	Commercial Water Filter System	4	
23.21.21.25.65	Commercial Filtration Equipment	4	
23.21.21.27	Commercial Refrigerators And Freezers	3	
23.21.21.27.11	Commercial Blast Chillers	4	
23.21.21.27.13	Commercial Freezers	4	
23.21.21.27.13.11	Commercial Blast Freezers	5	
23.21.21.27.13.13	Commercial Chest Freezers	5	
23.21.21.27.13.15	Commercial Flammable Liquid Freezers	5	
23.21.21.27.13.17	Commercial Freeze Drying Equipment	5	
23.21.21.27.13.19	Commercial Plate Freezers	5	
23.21.21.27.13.21	Commercial Sub Zero Freezers	5	
23.21.21.27.13.23	Commercial Upright Freezers	5	
23.21.21.27.13.25	Commercial Upright Reach In Freezers	5	
23.21.21.27.13.27	Commercial Upright Pass Through Freezers	5	
23.21.21.27.13.29	Commercial Upright Roll In Freezers	5	
23.21.21.27.13.31	Commercial Walk In Freezers	5	
23.21.21.27.15	Commercial Refrigerators	4	
23.21.21.27.15.11	Commercial Flammable Liquid Refrigerators	5	
23.21.21.27.15.13	Commercial Liquid Nitrogen Refrigerators	5	
23.21.21.27.15.15	Commercial Refrigerated Containers	5	
23.21.21.27.15.17	Commercial Refrigerated Tanks	5	
23.21.21.27.15.19	Commercial Refrigerated Vessels	5	
23.21.21.27.15.21	Commercial Upright Refrigerators	5	
23.21.21.27.15.23	Commercial Upright Reach In Refrigerators	5	
23.21.21.27.15.25	Commercial Upright Pass Through Refrigerators	5	
23.21.21.27.15.27	Commercial Upright Roll In Refrigerators	5	
23.21.21.27.15.29	Commercial Walk In Refrigerators	5	
23.21.21.27.17	Commercial Refrigerator Freezers	4	
23.21.21.27.19	Commercial Food Storage Coolers	4	
23.21.21.27.19.11	Commercial Walk In Coolers	5	
23.21.21.29	Commercial Ice Machines	3	
23.21.21.29.11	Commercial Block Ice Makers	4	
23.21.21.29.13	Commercial Cube Ice Makers	4	
23.21.21.29.15	Commercial Flaker Ice Makers	4	
23.21.21.29.17	Commercial Ice Dispensers	4	
23.21.21.29.19	Commercial Ice Shaver Dispensers	4	
23.21.21.29.21	Commercial Ice Maker Bins	4	
23.21.21.31	Commercial Food Preparation Equipment	3	
23.21.21.31.11	Commercial Food Mixers	4	
23.21.21.31.13	Commercial Food Peelers	4	
23.21.21.31.15	Commercial Food Processors	4	
23.21.21.31.17	Commercial Food Service Stations	4	
23.21.21.31.19	Commercial Food Slicers	4	
23.21.21.31.19.11	Commercial Electric Food Slicers	5	
23.21.21.31.19.13	Commercial Mechanical Food Slicers	5	
23.21.21.31.21	Commercial Food Preparation Tables	4	
23.21.21.31.21.11	Commercial Refrigerated Food Preparation Tables	5	
23.21.21.31.23	Commercial Drink Making Equipment	4	
23.21.21.33	Commercial Food Service Furniture	3	
23.21.21.33.11	Commercial Bar Stools	4	
23.21.21.33.13	Commercial Restaurant Chairs	4	
23.21.21.33.15	Commercial Restaurant Booths	4	
23.21.21.33.17	Commercial Restaurant Seating Units	4	
23.21.21.33.19	Commercial Restaurant Tables	4	
23.21.21.35	Commercial Serving Counters	3	
23.21.21.35.11	Commercial Bars	4	
23.21.21.35.11.11	Commercial Beverage Bars	5	
23.21.21.35.11.13	Commercial Salad Bars	5	
23.21.21.35.11.15	Commercial Bar Equipment	5	
23.21.21.35.13	Commercial Serving Counters	4	
23.21.21.35.13.11	Commercial Condiment Counters	5	
23.21.21.35.13.13	Commercial Serving Counters	5	
23.21.21.35.15	Commercial Service Line Equipment	4	
23.21.21.37	Commercial Food Service Storage Equipment	3	
23.21.21.37.11	Commercial Bottle Racks	4	
23.21.21.39	Commercial Food Service Delivery Equipment	3	
23.21.21.39.11	Commercial Food Delivery Conveyors	4	
23.21.21.39.13	Commercial Food Delivery Carts	4	
23.21.21.39.15	Commercial Restaurant Turntables	4	
23.21.21.41	Commercial Food Service Ventilation Equipment	3	
23.21.21.41.11	Commercial Food Hood Equipment	4	
23.21.21.41.11.11	Commercial Food Service Hoods	5	
23.21.21.41.13	Commercial Food Ventilation Equipment	4	
23.21.21.41.13.11	Commercial Food Ventilation Fire Suppression Systems	5	
23.21.21.41.13.13	Commercial Catering Ventilation	5	
23.21.21.43	Commercial Food Processing Equipment	3	
23.21.21.45	Commercial Food Weighing Equipment	3	
23.21.21.47	Commercial Food Wrapping Equipment	3	
23.21.23.00	Residential Furniture and Equipment	2	
23.21.23.11	Complete Residential Dining Room Suites	3	
23.21.23.13	Residential Seating	3	
23.21.23.13.11	Residential Chairs	4	
23.21.23.13.13	Residential Settees	4	
23.21.23.13.15	Residential Sofas	4	
23.21.23.13.17	Residential Stools	4	
23.21.23.13.19	Residential Benches	4	
23.21.23.13.21	Residential Chaises Lounges	4	
23.21.23.13.23	Residential Sofa Beds	4	
23.21.23.13.25	Residential Chair Beds	4	
23.21.23.15	Residential Tables	3	
23.21.23.15.11	Residential Dining Room Tables	4	
23.21.23.15.13	Residential Sideboards	4	
23.21.23.15.15	Residential End Tables	4	
23.21.23.15.17	Residential Coffee Tables	4	
23.21.23.17	Residential Storage Units	3	
23.21.23.17.11	Residential Cabinet	4	
23.21.23.17.13	Residential China Cabinets	4	
23.21.23.17.15	Residential Cupboards	4	
23.21.23.17.17	Residential Chests	4	
23.21.23.19	Residential Bedroom Furniture	3	
23.21.23.19.11	Complete Residential Bedroom Suites	4	
23.21.23.19.13	Residential Beds	4	
23.21.23.19.13.11	Residential Headboards	5	
23.21.23.19.13.13	Residential Footboards	5	
23.21.23.19.13.15	Residential Cots	5	
23.21.23.19.13.17	Residential Mattresses	5	
23.21.23.19.15	Residential Bedside Units	4	
23.21.23.19.17	Residential Dressing Tables	4	
23.21.23.19.19	Residential Dressers	4	
23.21.23.21	Residential Food Cabinets	3	
23.21.23.23	Residential Food Cooking Equipment	3	
23.21.23.23.11	Residential Broilers	4	
23.21.23.23.11.11	Residential Steam Broilers	5	
23.21.23.23.11.13	Residential Infra Red Broilers	5	
23.21.23.23.11.15	Residential Gas Broilers	5	
23.21.23.23.13	Residential Food Cookers	4	
23.21.23.23.13.11	Residential Food Induction Cookers	5	
23.21.23.23.13.13	Residential Pasta Cookers	5	
23.21.23.23.13.15	Residential Food Pressure Cookers	5	
23.21.23.23.13.17	Residential Rice Cookers	5	
23.21.23.23.15	Residential Crepe Machines	4	
23.21.23.23.17	Residential Fryers	4	
23.21.23.23.17.11	Residential Deep Fryers	5	
23.21.23.23.17.13	Residential Pressure Fryers	5	
23.21.23.23.19	Residential Griddles	4	
23.21.23.23.21	Residential Grills	4	
23.21.23.23.21.11	Residential Barbecue Grills	5	
23.21.23.23.21.13	Residential Char Broiler Grills	5	
23.21.23.23.21.15	Residential Hot Dog Grills	5	
23.21.23.23.23	Residential Kettles	4	
23.21.23.23.23.11	Residential Poacher Kettles	5	
23.21.23.23.23.13	Residential Salmon Kettles	5	
23.21.23.23.25	Residential Ovens and Stoves	4	
23.21.23.23.25.11	Residential Stoves	5	
23.21.23.23.25.13	Residential Combination Convection Ovens	5	
23.21.23.23.25.15	Residential Convection Ovens	5	
23.21.23.23.25.17	Residential Gas Ovens	5	
23.21.23.23.25.19	Residential Electric Ovens	5	
23.21.23.23.25.21	Residential Microwave Ovens	5	
23.21.23.23.27	Residential Rotisseries	4	
23.21.23.23.29	Residential Food Steamers	4	
23.21.23.23.29.11	Residential High Pressure Food Steamer	5	
23.21.23.23.31	Residential Small Specialized Cooking Equipment	4	
23.21.23.25	Residential Dishwashers	3	
23.21.23.25.11	Residential Electric Dishwashers	4	
23.21.23.25.13	Residential Gas Dishwashers	4	
23.21.23.27	Residential Waste Disposal Units	3	
23.21.23.27.11	Residential Garbage Disposals	4	
23.21.23.27.13	Residential Garbage Compactors	4	
23.21.23.27.13.11	Residential Coffee Dispensers	5	
23.21.23.29	Residential Food and Beverage Dispensing Equipment	3	
23.21.23.29.11	Residential Cappuccino or Espresso Dispensers	4	
23.21.23.29.13	Residential Bubbler Dispensers	4	
23.21.23.29.15	Residential Hot Water Dispensers	4	
23.21.23.31	Residential Water Filter System	3	
23.21.23.33	Residential Refrigerators And Freezers	3	
23.21.23.33.11	Residential Freezers	4	
23.21.23.33.11.11	Residential Chest Freezers	5	
23.21.23.33.11.13	Residential Sub Zero Freezers	5	
23.21.23.33.11.15	Residential Upright Freezers	5	
23.21.23.33.13	Residential Refrigerators	4	
23.21.23.33.13.11	Residential Upright Refrigerators	5	
23.21.23.33.15	Residential Refrigerator Freezers	4	
23.21.23.35	Residential Ice Machines	3	
23.21.23.35.11	Residential Cube Ice Makers	4	
23.21.23.35.13	Residential Ice Dispensers	4	
23.21.23.37	Residential Food Preparation Equipment	3	
23.21.23.37.11	Residential Food Mixers	4	
23.21.23.37.13	Residential Food Peelers	4	
23.21.23.37.15	Residential Food Processors	4	
23.21.23.37.17	Residential Food Slicers	4	
23.21.23.37.17.11	Residential Electric Food Slicers	5	
23.21.23.37.17.13	Residential Mechanical Food Slicers	5	
23.21.23.37.19	Residential Food Preparation Tables	4	
23.21.23.39	Residential Kitchen and Dining Room Furniture	3	
23.21.23.39.11	Residential Bar Stools	4	
23.21.23.39.13	Residential Kitchen and Dining Room Chairs	4	
23.21.23.39.15	Residential Kitchen and Dining Room Tables	4	
23.21.23.39.17	Residential Bars	4	
23.21.23.39.17.11	Residential Beverage Bars	5	
23.21.23.39.17.13	Residential Bar Equipment	5	
23.21.23.41	Residential Food Storage Equipment	3	
23.21.23.41.11	Residential Bottle Racks	4	
23.21.23.43	Residential Cooking Ventilation Equipment	3	
23.21.23.43.11	Residential Range Hoods	4	
23.21.23.43.13	Residential Food Ventilation Equipment	4	
23.21.23.45	Residential Clothes Airers	3	
23.21.23.45.11	Residential Clothes Stands	4	
23.21.23.45.13	Residential Clothes Lines	4	
23.21.23.47	Residential Combination Laundry Washer Dryers	3	
23.21.23.49	Residential Ironing and Pressing Machines	3	
23.21.23.51	Residential Laundry Dryers	3	
23.21.23.51.11	Residential Electric Laundry Dryers	4	
23.21.23.51.13	Residential Gas Laundry Dryers	4	
23.21.23.53	Residential Washing Machines	3	
23.21.23.53.11	Residential Front Loading Laundry Washers	4	
23.21.23.53.13	Residential Side Loading Laundry Washers	4	
23.21.23.53.15	Residential Top Loading Laundry Washers	4	
23.21.25.00	Educational and Cultural Equipment and Furnishings	2	
23.21.25.11	Group Seating	3	
23.21.25.11.11	Auditorium Seating	4	
23.21.25.11.11.11	Fixed Audience Seating	5	
23.21.25.11.11.13	Portable Audience Seating	5	
23.21.25.11.11.13.11	Folding Audience Chairs	6	
23.21.25.11.11.13.13	Interlocking Audience Chairs	6	
23.21.25.11.11.13.15	Stacking Audience Chairs	6	
23.21.25.11.13	Classroom Furniture	4	
23.21.25.11.13.11	Seat Assembly	5	
23.21.25.11.13.13	Table Assembly	5	
23.21.25.11.13.15	Modular Desks	5	
23.21.25.11.15	Multiple Use Fixed Seating	4	
23.21.25.11.17	Platforms	4	
23.21.25.11.17.11	Portable Stages	5	
23.21.25.11.17.13	Risers	5	
23.21.25.11.19	Language Laboratory Equipment	4	
23.21.25.13	Theater and Stage Equipment	3	
23.21.25.13.11	Acoustical Shells	4	
23.21.25.13.13	Rigging Systems and Controls	4	
23.21.25.13.15	Scenery Docks	4	
23.21.25.13.17	Suspension Systems	4	
23.21.25.13.19	Stage Curtains	4	
23.21.25.15	Planetarium Equipment and Furnishings	3	
23.21.25.15.11	Planetarium Projectors	4	
23.21.25.15.13	Planetarium Seating	4	
23.21.25.17	Observatory Equipment and Furnishings	3	
23.21.25.17.11	Telescopes	4	
23.21.25.19	Ecclesiastical Equipment and Furnishings	3	
23.21.25.19.11	Religious Seating	4	
23.21.25.19.11.11	Pews	5	
23.21.25.19.11.13	Benches	5	
23.21.25.19.13	Chancel Furnishings	4	
23.21.25.19.13.11	Lecterns	5	
23.21.25.19.13.13	Pulpits	5	
23.21.25.19.13.15	Choir Screens	5	
23.21.25.19.13.17	Altars	5	
23.21.25.19.15	Baptisteries	4	
23.21.25.19.17	Baptismal Fonts	4	
23.21.25.19.19	Instrumental Equipment	4	
23.21.25.19.19.11	Organs	5	
23.21.25.19.19.13	Organ Cases	5	
23.21.25.19.19.15	Screens	5	
23.21.25.19.19.17	Bells	5	
23.21.25.19.19.19	Carillons	5	
23.21.25.19.21	Synagogue Furniture	4	
23.21.25.19.23	Mosque Furniture	4	
23.21.25.19.25	Temple Furniture	4	
23.21.25.21	Library and Archive Equipment and Furnishings	3	
23.21.25.21.11	Library Stack Systems	4	
23.21.25.21.11.11	Library Shelving	5	
23.21.25.21.13	Book Depositories	4	
23.21.25.21.15	Book Theft Protection Equipment	4	
23.21.25.21.17	Library Furniture	4	
23.21.25.21.17.11	Library Filing Furniture	5	
23.21.25.21.17.13	Library Display Furniture	5	
23.21.25.21.17.15	Study Carrels	5	
23.21.25.23	Exhibition Equipment and Furnishings	3	
23.21.25.23.11	Display Furniture	4	
23.21.25.23.11.11	Display Cabinets	5	
23.21.25.23.11.13	Display Racks	5	
23.21.25.23.11.15	Display Carousels	5	
23.21.25.23.13	Gallery Hanging Systems	4	
23.21.25.23.15	Pedestals	4	
23.21.25.23.17	Retail Cabinets	4	
23.21.25.23.19	Exhibition Stands	4	
23.21.25.23.21	Shell Schemes	4	
23.21.25.23.23	Exhibit Equipment	4	
23.21.27.00	Child Furnishings	2	
23.21.27.11	Child Beds	3	
23.21.27.11.11	Infant Cradles	4	
23.21.27.11.13	Bassinets	4	
23.21.27.11.15	Infant Beds	4	
23.21.27.11.17	Toddler Beds	4	
23.21.27.11.19	Children Beds	4	
23.21.27.13	Child Cots	3	
23.21.27.13.11	Toddler Cots	4	
23.21.27.13.13	Children Cots	4	
23.21.27.13.15	Cot Carrier	4	
23.21.27.15	Child Playpens	3	
23.21.27.17	Child Benches	3	
23.21.27.17.11	Toddler Benches	4	
23.21.27.17.13	Children Benches	4	
23.21.27.19	Child Bathtub	3	
23.21.27.19.11	Infant Bathtubs	4	
23.21.27.19.13	Toddler Bathtubs	4	
23.21.27.19.15	Children Bathtubs	4	
23.21.27.21	Child Chairs	3	
23.21.27.21.11	Child High Chairs	4	
23.21.27.21.13	Child Stools	4	
23.21.27.23	Child Play Panels	3	
23.21.27.25	Child Indoor Swings	3	
23.21.27.25.11	Infant Swings	4	
23.21.27.25.13	Toddler Swings	4	
23.21.27.27	Child Sofas	3	
23.21.27.29	Child Strollers	3	
23.21.27.29.11	Child Carriage Strollers	4	
23.21.27.29.13	Child Multiple Carriage Strollers	4	
23.21.27.29.15	Child Perambulators	4	
23.21.27.29.17	Child Buggies	4	
23.21.27.31	Child Tables	3	
23.21.27.31.11	Diaper Changing Tables	4	
23.21.27.33	Child Storage Units	3	
23.21.27.33.11	Child File Cabinets	4	
23.21.27.33.13	Child Kiosks	4	
23.21.27.33.15	Child Shelves	4	
23.21.27.33.17	Child Book Display Units	4	
23.21.27.33.19	Child Card Catalog Units	4	
23.21.27.33.21	Child Cubbies	4	
23.21.27.35	Child Dressers	3	
23.21.29.00	Athletic and Recreational Equipment	2	
23.21.29.11	Athletic or Recreation Screening	3	
23.21.29.11.11	Tennis Court Windbreakers	4	
23.21.29.13	Athletic Surfacing	3	
23.21.29.13.11	Baseball Field Surfacing	4	
23.21.29.13.13	Multi Purpose Court Surfacing	4	
23.21.29.13.15	Resilient Matting	4	
23.21.29.13.17	Synthetic Grass Surfacing	4	
23.21.29.13.19	Synthetic Running Track Surfacing	4	
23.21.29.13.21	Tennis Court Surfacing	4	
23.21.29.15	Athletic Equipment	3	
23.21.29.15.11	Bowling Alley Equipment	4	
23.21.29.15.13	Goalposts	4	
23.21.29.15.15	Nets	4	
23.21.29.15.17	Backstops	4	
23.21.29.15.19	Scoreboards	4	
23.21.29.15.21	Time Clocks	4	
23.21.29.15.23	Floor Sockets	4	
23.21.29.15.25	Climbing Equipment	4	
23.21.29.15.25.11	Climbing Walls	5	
23.21.29.15.25.13	Climbing Ropes	5	
23.21.29.15.27	Gymnasium Dividers	4	
23.21.29.15.29	Wall Mats	4	
23.21.29.15.31	Floor Mats	4	
23.21.29.15.33	Referee Platforms	4	
23.21.29.15.35	Athletic Equipment Storage Racks	4	
23.21.29.17	Playground Equipment	3	
23.21.29.17.11	Climbing Apparatus	4	
23.21.29.17.13	Climbing Walls	4	
23.21.29.17.13.11	Harness Equipment	5	
23.21.29.17.15	Merry Go Rounds	4	
23.21.29.17.17	Playhouse Gardens	4	
23.21.29.17.19	Rope Climbing Equipment	4	
23.21.29.17.21	Sand Tables	4	
23.21.29.17.23	Water Tables	4	
23.21.29.17.25	Sandboxes	4	
23.21.29.17.27	See Saws	4	
23.21.29.17.27.11	"Spring, Rocking Equipment"	5	
23.21.29.17.29	Slides	4	
23.21.29.17.31	Swings	4	
23.21.29.17.31.11	Harness Swings	5	
23.21.29.17.31.13	Rope Swings	5	
23.21.29.17.31.15	Tire Swings	5	
23.21.29.17.31.17	Seat Swings	5	
23.21.29.17.33	Playground Tunnel	4	
23.21.29.17.35	Play Structures	4	
23.21.29.19	Recreational Equipment	3	
23.21.29.19.11	Ping Pong Equipment	4	
23.21.29.19.13	Arcade Machines	4	
23.21.29.19.15	Billiards Equipment	4	
23.21.29.19.17	Sauna Equipment	4	
23.21.29.19.19	Steam Room Equipment	4	
23.21.29.19.21	Shooting Range Equipment	4	
23.21.29.19.23	Swimming Pool Equipment	4	
23.21.29.19.23.11	Diving Boards	5	
23.21.29.19.23.13	Starting Blocks	5	
23.21.29.19.23.15	Ladders	5	
23.21.29.21	Pools	3	
23.21.29.21.11	Leisure Whirlpools	4	
23.21.29.21.13	Hot Tubs	4	
23.21.29.21.15	Swimming Pools	4	
23.21.29.21.17	Lap Pools	4	
23.21.29.23	Spectator Stands	3	
23.21.29.23.11	Fixed Stadium Seating	4	
23.21.29.23.13	Telescoping Stands	4	
23.21.29.23.15	Bleachers	4	
23.21.29.23.15.11	Telescoping Bleachers	5	
23.21.29.23.17	Telescoping Chair Platforms	4	
23.21.31.00	Fitness and Exercise Equipment	2	
23.21.31.11	Exercise Apparatus	3	
23.21.31.11.11	Weight Training Exercise Apparatus	4	
23.21.31.11.11.11	Multi Station Weight Training Exercise Apparatus	5	
23.21.31.13	Exercise Bars	3	
23.21.31.13.11	Chinning Bars	4	
23.21.31.13.13	Weightlifting Bars	4	
23.21.31.15	Exercise Benches	3	
23.21.31.15.11	Weightlifting Benches	4	
23.21.31.15.11.11	Adjustable Utility Weightlifting Benches	5	
23.21.31.15.11.13	Decline Weightlifting Benches	5	
23.21.31.15.11.15	Incline Weightlifting Benches	5	
23.21.31.15.11.17	Supine Weightlifting Benches	5	
23.21.31.17	Exercise Boards	3	
23.21.31.17.11	Abdominal Exercise Boards	4	
23.21.31.17.11.11	Raised and Bent Leg Abdominal Exercise Boards	5	
23.21.31.19	Exercise Machines	3	
23.21.31.19.11	Abdominal Exercise Machines	4	
23.21.31.19.13	Back Extension Exercise Machines	4	
23.21.31.19.15	Biceps Exercise Machines	4	
23.21.31.19.17	Chest Exercise Machines	4	
23.21.31.19.19	Closed Chain Exercise Machines	4	
23.21.31.19.21	Hip Exercise Machines	4	
23.21.31.19.21.11	Hip Abduction Exercise Machines	5	
23.21.31.19.21.13	Hip Adduction Exercise Machines	5	
23.21.31.19.23	Leg Exercise Machines	4	
23.21.31.19.23.11	Leg Curl Exercise Machines	5	
23.21.31.19.23.13	Leg Extension Exercise Machines	5	
23.21.31.19.23.15	Leg Press Exercise Machines	5	
23.21.31.19.23.17	Leg Press Squat Exercise Machines	5	
23.21.31.19.23.19	Leg Squat Exercise Machines	5	
23.21.31.19.25	Neck Exercise Machines	4	
23.21.31.19.27	Pullover Exercise Machines	4	
23.21.31.19.29	Rotary Shoulder Exercise Machines	4	
23.21.31.19.31	Rowing Exercise Machines	4	
23.21.31.19.33	Shoulder Exercise Machines	4	
23.21.31.19.35	Treadmills	4	
23.21.31.19.37	Triceps Exercise Machines	4	
23.21.31.19.39	Continuous Passive Motion CPM Exercisers	4	
23.21.31.19.41	Ladder Exercisers	4	
23.21.31.19.43	Exercise Platforms	4	
23.21.31.19.45	Ramp Curb Exercisers	4	
23.21.31.19.47	Staircase Exercisers	4	
23.21.31.19.49	Upper and Lower Extremities Exercisers	4	
23.21.31.19.51	Upper Body Exercisers	4	
23.21.31.21	Exercise Floor Mats	3	
23.21.31.23	Exercise Pulleys	3	
23.21.31.23.11	Triplex Exercise Pulleys	4	
23.21.33.00	Industrial and Manufacturing Equipment and Furnishings	2	
23.21.33.11	Manufacturing Equipment 	3	
23.21.33.13	Manufacturing Furniture	3	
23.21.33.13.11	Flat Work Surface Furniture	4	
23.21.33.13.13	Work Stations 	4	
23.21.33.15	Shop Equipment	3	
23.21.33.17	Shop Furniture	3	
23.21.33.17.11	Shop Work Surfaces	4	
23.21.33.17.13	Shop Storage Fittings	4	
23.21.35.00	Miscellaneous Equipment and Furnishings	2	
23.21.35.11	Darkroom Equipment and Furnishings	3	
23.21.35.11.11	Darkroom Processing Equipment	4	
23.21.35.13	Vending Equipment	3	
23.21.35.13.11	Vending Machines	4	
23.21.35.15	Ticket Machines	3	
23.21.35.17	Change Machines	3	
23.21.35.19	Vehicle Service Equipment	3	
23.21.35.19.11	Compressed Air Vehicle Service Equipment	4	
23.21.35.19.13	Fuel Dispensing Equipment	4	
23.21.35.19.15	Vehicle Lubrication Equipment	4	
23.21.35.19.17	Tire Changing Equipment	4	
23.21.35.19.19	Vehicle Washing Equipment	4	
23.21.35.19.21	Vehicle Hoists	4	
23.21.35.21	Security and Vault Equipment and Furnishings	3	
23.21.35.21.11	Safes	4	
23.21.35.21.13	Safe Deposit Boxes	4	
23.21.35.21.15	Vault Doors	4	
23.21.35.21.17	Day Gates	4	
23.21.35.21.19	Anti Bandit Screens	4	
23.21.35.21.19.11	Gun Ports	5	
23.21.35.21.21	Teller and Service Equipment	4	
23.21.35.21.21.11	Automated Banking Systems	5	
23.21.35.21.21.13	Money Cart Pass Through	5	
23.21.35.21.21.15	Package Transfer Units	5	
23.21.35.21.21.17	Service and Teller Window Units	5	
23.21.35.21.21.19	Teller Equipment Systems	5	
23.21.35.21.21.21	Deal Drawers	5	
23.21.35.21.23	Key Security Cabinets	4	
23.21.35.21.25	Money Handling Equipment	4	
23.21.35.23	Detention Equipment and Furnishings	3	
23.21.35.23.11	Detention Enclosures	4	
23.21.35.23.13	Detention Furnishings and Specialties	4	
23.21.35.23.15	Detention Furniture	4	
23.21.35.25	Agricultural Equipment	3	
23.21.35.25.11	Milkers	4	
23.21.35.25.13	Stock Feeders	4	
23.21.35.25.15	Stock Waterers	4	
23.21.35.25.17	Waste Clean Up Equipment	4	
23.21.37.00	"Furnishings, Ornaments, and Decoration"	2	
23.21.37.11	Soft Furnishings	3	
23.21.37.11.11	Rugs	4	
23.21.37.11.13	Upholstery	4	
23.21.37.11.15	Cushions	4	
23.21.37.11.17	Padding	4	
23.21.37.11.19	Tablecloths	4	
23.21.37.13	Decoration	3	
23.21.37.13.11	Commercial Artwork	4	
23.21.37.13.11.11	Wall Hangings	5	
23.21.37.13.13	Clocks	4	
23.21.37.13.15	Mirrors	4	
23.21.37.13.17	Interior Ornamental Fountains	4	
23.21.37.13.19	Ornamental Screens	4	
23.21.37.13.21	Decorative Planters	4	
23.21.37.13.23	Decorative Vases	4	
23.21.39.00	Commercial Washing and Waste Disposal Equipment	2	
23.21.39.11	Commercial Washing Equipment	3	
23.21.39.11.11	High Pressure Washing Equipment	4	
23.21.39.13	Drain Boards	3	
23.21.41.00	Commercial Laundry Equipment	2	
23.21.41.11	Commercial Clothes Airers	3	
23.21.41.11.11	Commercial Clothes Dryers	4	
23.21.41.11.13	Commercial Clothes Stands	4	
23.21.41.11.15	Commercial Clothes Lines	4	
23.21.41.13	Commercial Combination Laundry Washer Dryers	3	
23.21.41.15	Commercial Dry Cleaning Equipment	3	
23.21.41.17	Commercial Laundry Dispensers	3	
23.21.41.17.11	Commercial Dry Laundry Detergent Dispensers	4	
23.21.41.17.13	Commercial Liquid Laundry Detergent Dispensers	4	
23.21.41.17.15	Commercial Dryer Sheet Dispensers	4	
23.21.41.19	Commercial Dry Cleaning Machines	3	
23.21.41.21	Commercial Laundry Extractors	3	
23.21.41.23	Commercial Flat Work Ironers	3	
23.21.41.23.11	Commercial Electric Flat Work Ironers	4	
23.21.41.23.13	Commercial Gas Flat Work Ironers	4	
23.21.41.23.15	Commercial Steam Flat Work Ironers	4	
23.21.41.25	Commercial Ironing and Pressing Machines	3	
23.21.41.27	Commercial Laundry Folding Machines	3	
23.21.41.29	Commercial Laundry Conveyors	3	
23.21.41.31	Commercial Laundry Dryers	3	
23.21.41.31.11	Commercial Electric Laundry Dryers	4	
23.21.41.31.13	Commercial Gas Laundry Dryers	4	
23.21.41.31.15	Commercial Steam Laundry Dryers	4	
23.21.41.33	Commercial Laundry Presses	3	
23.21.41.33.11	Commercial Electric Laundry Presses	4	
23.21.41.33.13	Commercial Gas Laundry Presses	4	
23.21.41.33.15	Commercial Steam Laundry Presses	4	
23.21.41.35	Commercial Laundry Spreader Feeders	3	
23.21.41.37	Commercial Laundry Steam Tunnels	3	
23.21.41.39	Commercial Laundry Tubs	3	
23.21.41.41	Commercial Washing Machines	3	
23.21.41.41.11	Commercial Front Loading Laundry Washers	4	
23.21.41.41.13	Commercial Side Loading Laundry Washers	4	
23.21.41.41.15	Commercial Top Loading Laundry Washers	4	
23.21.41.41.17	Commercial Tunnel Laundry Washers	4	
23.21.43.00	Cleaning Equipment	2	
23.21.43.11	Buckets	3	
23.21.43.11.11	Mop Buckets	4	
23.21.43.11.13	Waste Paper Baskets	4	
23.21.43.13	Cleaners	3	
23.21.43.13.11	Pressure Cleaners	4	
23.21.43.13.13	Steam Cleaners	4	
23.21.43.15	Custodial Dispensers	3	
23.21.43.15.11	Air Freshener Dispensers	4	
23.21.43.15.13	Bathroom Tissue Dispensers	4	
23.21.43.15.15	Cleaning Rag Dispensers	4	
23.21.43.15.17	Facial Tissue Dispensers	4	
23.21.43.15.19	Hand Cleaner Dispensers	4	
23.21.43.15.21	Institutional Soap Dispensers	4	
23.21.43.15.23	Lotion Dispensers	4	
23.21.43.15.25	Paper Towel Dispensers	4	
23.21.43.15.27	Sanitary Goods Dispensers	4	
23.21.43.15.29	Toilet Accessories Dispensers	4	
23.21.43.15.31	Toilet Tissue Dispensers	4	
23.21.43.15.33	Urinal Accessories Dispensers	4	
23.21.43.17	Duct Cleaning Machines	3	
23.21.43.19	Floor Cleaning Equipment	3	
23.21.43.19.11	Floor Burnishers	4	
23.21.43.19.13	Floor Polishers	4	
23.21.43.19.15	Floor Scrapers	4	
23.21.43.19.17	Floor Scrubbers	4	
23.21.43.19.19	Floor Sweepers	4	
23.21.43.19.19.11	Carpet Sweepers	5	
23.21.43.19.21	Floor Washing Machines	4	
23.21.43.21	Room Cleaning Equipment	3	
23.21.43.21.11	Vacuum Cleaning Equipment	4	
23.21.43.21.11.11	Vacuum Cleaning Systems	5	
23.21.43.21.11.11.11	Centralized Vacuum Cleaning System	6	
23.21.43.21.11.13	Vacuum Cleaners	5	
23.21.43.21.11.13.11	Heavy Duty Tank Vacuum Cleaners	6	
23.21.43.21.11.13.13	Wet Dry Combination Vacuum Cleaners	6	
23.21.43.21.11.13.15	Wet Vacuum Cleaners	6	
23.21.43.21.13	Floor and Wall Cleaning	4	
23.21.43.21.15	Housekeeping Carts	4	
23.21.43.23	Sanitary Waste Receptacles	3	
23.21.43.23.11	Installed Sanitary Waste Receptacles	4	
23.21.43.23.13	Portable Sanitary Waste Receptacles	4	
23.21.43.25	Custodial Sinks	3	
23.21.43.25.11	Mop Sinks	4	
23.21.43.27	Custodial Washers	3	
23.21.43.27.11	Trash Can Pedestal Washers	4	
23.21.45.00	Historic Preservation Products	2	
23.21.45.11	Fine Art	3	
23.21.45.11.11	Two Dimensional Art	4	
23.21.45.11.11.11	Fine Art Paintings	5	
23.21.45.11.11.13	Fine Art Drawings	5	
23.21.45.11.11.15	Fine Art Printmaking	5	
23.21.45.11.11.15.11	Fine Art Lithography	6	
23.21.45.11.11.15.13	Fine Art Intaglio	6	
23.21.45.11.11.15.15	Fine Art Prints	6	
23.21.45.11.11.17	Fine Art Photography	5	
23.21.45.11.11.19	Fine Art Graphic Designs	5	
23.21.45.11.11.21	Fine Art Illustrations	5	
23.21.45.11.13	Three Dimensional Art	4	
23.21.45.11.13.11	Fine Art Sculpture 	5	
23.21.45.11.13.13	Fine Art Ceramics	5	
23.21.45.11.13.13.11	Fine Art Pottery	6	
23.21.45.11.13.15	Fine Art Mosaics	5	
23.21.45.11.13.15.11	Fine Art Tile	6	
23.21.45.11.13.17	Fine Art Glass	5	
23.21.45.11.13.17.11	Fine Art Stained Glass	6	
23.21.45.11.13.17.13	Fine Art Etched Glass	6	
23.21.45.11.13.19	Fine Art Architecture	5	
23.21.45.11.13.19.11	Fine Art Decorative Architecture	6	
23.21.45.11.13.21	Fine Art Textile	5	
23.21.45.11.13.21.11	Fine Art Tapestry	6	
23.21.45.11.15	Four Dimensional Art	4	
23.21.45.11.15.11	Fine Art Film	5	
23.21.45.11.15.13	Fine Art Video	5	
23.21.45.13	Historic Documents	3	
23.21.45.13.11	Historic Paper Documents	4	
23.21.45.13.13	Historic Velum Documents	4	
23.21.45.13.15	Historic Parchment Documents	4	
23.21.45.15	Historic Architectural Items	3	
23.21.45.15.11	Historic Architectural Models	4	
23.21.45.15.13	Historic Architectural Constructions	4	
23.21.45.15.15	Historic Architectural Designs	4	
23.21.45.15.17	Historic Decorative Architectures	4	
23.21.47.00	Musical Equipment	2	
23.21.47.11	Conductor Equipment	3	
23.21.47.11.11	Conductor Podium	4	
23.21.47.11.13	Conductor Platform	4	
23.21.47.13	Musical Instrument	3	
23.21.47.13.11	String Instrument	4	
23.21.47.13.11.11	Piano	5	
23.23.00.00	Conveying Systems and Material Handling Products	1	
23.23.11.00	Vertical Transportation Equipment	2	
23.23.11.11	Elevators	3	
23.23.11.11.11	Traction Elevators	4	
23.23.11.11.11.11	Freight Traction Elevators	5	
23.23.11.11.11.13	Passenger Traction Elevators	5	
23.23.11.11.11.15	Residential Traction Elevators	5	
23.23.11.11.11.17	Service Traction Elevators	5	
23.23.11.11.13	Hydraulic Elevators	4	
23.23.11.11.13.11	Freight Hydraulic Elevators	5	
23.23.11.11.13.13	Passenger Hydraulic Elevators	5	
23.23.11.11.13.15	Residential Hydraulic Elevators	5	
23.23.11.11.13.17	Service Hydraulic Elevators	5	
23.23.11.11.15	Pneumatic Elevators	4	
23.23.11.11.15.11	Pneumatic Passenger Elevators	5	
23.23.11.11.17	Rack and Pinion Elevators	4	
23.23.11.11.19	Elevator Cabs	4	
23.23.11.11.21	Elevator Equipment and Controls	4	
23.23.11.11.21.11	Elevator Doors	5	
23.23.11.11.21.13	Elevator Controls	5	
23.23.11.11.23	Elevator Restoration Products	4	
23.23.11.13	Escalators	3	
23.23.13.00	Lifting Equipment	2	
23.23.13.11	Lifts	3	
23.23.13.11.11	Boom Lifts	4	
23.23.13.11.13	Fork Lifts	4	
23.23.13.11.15	Man Lifts	4	
23.23.13.11.17	Patient Lifts	4	
23.23.13.11.17.11	Installed Patient Lifts	5	
23.23.13.11.17.13	Portable Patient Lifts	5	
23.23.13.11.19	Platform Lifts	4	
23.23.13.11.19.11	Elevating Platform Lifts	5	
23.23.13.11.19.13	Inclined Platform Lifts	5	
23.23.13.11.19.15	Scissor Platform Lifts	5	
23.23.13.11.21	Scaffold Lifts	4	
23.23.13.11.23	Stage Screen Lifts	4	
23.23.13.11.25	Wheel Chair Lifts	4	
23.23.13.11.25.11	Hydraulic Wheel Chair Lifts	5	
23.23.13.11.25.11.11	Hydraulic Wheel Chair Rail Lifts	6	
23.23.13.11.25.11.13	Hydraulic Wheel Chair Stair Lifts	6	
23.23.13.11.25.11.15	Hydraulic Wheel Chair Vertical Lifts	6	
23.23.13.11.25.13	Mechanical Wheel Chair Lifts	5	
23.23.13.11.25.13.11	Mechanical Wheel Chair Rail Lifts	6	
23.23.13.11.25.13.13	Mechanical Wheel Chair Stair Lifts	6	
23.23.13.11.25.13.15	Mechanical Wheel Chair Vertical Lifts	6	
23.23.15.00	Horizontal Transportation Equipment	2	
23.23.15.11	Moving Walks	3	
23.23.15.13	People Movers	3	
23.23.15.13.11	Monorails	4	
23.23.15.13.13	Duorails	4	
23.23.15.13.15	Maglevs	4	
23.23.15.15	Jetways	3	
23.23.15.17	Transportation Gangways	3	
23.23.17.00	Materials Handling	2	
23.23.17.11	Dumbwaiters	3	
23.23.17.11.11	Manual Dumbwaiters	4	
23.23.17.11.13	Hydraulic Dumbwaiters	4	
23.23.17.11.15	Traction Dumbwaiters	4	
23.23.17.13	Material Transport	3	
23.23.17.13.11	Automated Document Filing and Retrieval	4	
23.23.17.13.13	Automated Guided Vehicles	4	
23.23.17.13.13.11	Guided Vehicle Material Handling	5	
23.23.17.13.13.13	Track Vehicle Material Handling	5	
23.23.17.15	Conveyors	3	
23.23.17.15.11	Conveyor Components?	4	
23.23.17.15.11.11	Conveyor Belts	5	
23.23.17.15.11.13	Conveyor Rollers	5	
23.23.17.15.13	Belt Conveyors	4	
23.23.17.15.15	Bucket Conveyors	4	
23.23.17.15.17	Container Conveyors	4	
23.23.17.15.19	Hopper and Track Conveyors	4	
23.23.17.15.21	Monorail Conveyors	4	
23.23.17.15.23	Oscillating Conveyors	4	
23.23.17.15.25	Pneumatic Conveyors	4	
23.23.17.15.27	Roller Conveyors	4	
23.23.17.15.29	Scoop Conveyors	4	
23.23.17.15.31	Screw Conveyors	4	
23.23.17.15.33	Selective Vertical Conveyors	4	
23.23.17.15.35	Postal Conveyors	4	
23.23.17.15.37	Baggage Conveying and Dispensing Equipment	4	
23.23.17.15.37.11	Baggage Conveyors	5	
23.23.17.15.37.13	Baggage Dispensing Units	5	
23.23.17.17	Chutes	3	
23.23.17.17.11	Coal Chutes	4	
23.23.17.17.13	Dry Bulk Materials Chutes	4	
23.23.17.17.15	Laundry and Linen Chutes	4	
23.23.17.17.17	Package Chutes	4	
23.23.17.17.19	Refuse Chutes	4	
23.23.17.19	Feeder Equipment	3	
23.23.17.19.11	Apron Feeders	4	
23.23.17.19.13	Reciprocating Plate Feeders	4	
23.23.17.19.15	Rotary Airlock Feeders	4	
23.23.17.19.17	Rotary Flow Feeders	4	
23.23.17.19.19	Vibratory Feeders	4	
23.23.17.21	Pneumatic Tube Systems	3	
23.23.17.21.11	Pneumatic Tubes	4	
23.23.17.21.13	Pneumatic Tube Controls	4	
23.23.17.21.15	Pneumatic Tube Vacuum Boxes	4	
23.23.17.21.17	Document Conveying Systems	4	
23.23.17.23	Cranes	3	
23.23.17.23.11	Hydraulic Cranes	4	
23.23.17.23.11.11	Hydraulic Bridge Cranes	5	
23.23.17.23.11.11.11	Top Running Hydraulic Overhead Cranes	6	
23.23.17.23.11.11.13	Underslung Hydraulic Overhead Cranes	6	
23.23.17.23.11.13	Hydraulic Gantry Cranes	5	
23.23.17.23.11.15	Hydraulic Jib Cranes	5	
23.23.17.23.11.17	Hydraulic Mobile Cranes	5	
23.23.17.23.11.19	Hydraulic Terrain Cranes	5	
23.23.17.23.11.21	Hydraulic Top Running Overhead Cranes	5	
23.23.17.23.11.23	Hydraulic Tower Cranes	5	
23.23.17.23.11.25	Hydraulic Track Cranes	5	
23.23.17.23.11.27	Hydraulic Underslung Overhead Cranes	5	
23.23.17.23.11.29	Hydraulic Workshop Cranes	5	
23.23.17.23.13	Mechanical Cranes	4	
23.23.17.23.13.11	Mechanical Bridge Cranes	5	
23.23.17.23.13.11.11	Top Running Mechanical Overhead Cranes	6	
23.23.17.23.13.11.13	Underslung Mechanical Overhead Cranes	6	
23.23.17.23.13.13	Mechanical Gantry Cranes	5	
23.23.17.23.13.15	Mechanical Jib Cranes	5	
23.23.17.23.13.17	Mechanical Mobile Cranes	5	
23.23.17.23.13.19	Mechanical Terrain Cranes	5	
23.23.17.23.13.21	Mechanical Top Running Overhead Cranes	5	
23.23.17.23.13.23	Mechanical Tower Cranes	5	
23.23.17.23.13.25	Mechanical Track Cranes	5	
23.23.17.23.13.27	Mechanical Underslung Overhead Cranes	5	
23.23.17.23.13.29	Mechanical Workshop Cranes	5	
23.23.17.23.15	Electric Cranes	4	
23.23.17.23.15.11	Electric Bridge Cranes	5	
23.23.17.23.15.13	Top Running Electric Overhead Cranes	5	
23.23.17.23.15.15	Underslung Electric Overhead Cranes	5	
23.23.17.23.15.17	Electric Gantry Cranes	5	
23.23.17.23.15.19	Electric Jib Cranes	5	
23.23.17.23.15.21	Electric Mobile Cranes	5	
23.23.17.23.15.23	Electric Terrain Cranes	5	
23.23.17.23.15.25	Electric Top Running Overhead Cranes	5	
23.23.17.23.15.27	Electric Tower Cranes	5	
23.23.17.23.15.29	Electric Track Cranes	5	
23.23.17.23.15.31	Electric Underslung Overhead Cranes	5	
23.23.17.23.15.33	Electric Workshop Cranes	5	
23.23.17.25	Derricks	3	
23.23.17.27	Hoists	3	
23.23.17.27.11	Fixed Hoists	4	
23.23.17.27.11.11	Pneumatic Fixed Hoists	5	
23.23.17.27.11.13	Electric Fixed Hoists	5	
23.23.17.27.11.15	Manual Fixed Hoists	5	
23.23.17.27.11.17	Hydraulic Fixed Hoists	5	
23.23.17.27.13	Trolley Hoists	4	
23.23.17.27.13.11	Pneumatic Trolley Hoists	5	
23.23.17.27.13.13	Electric Trolley Hoists	5	
23.23.17.27.13.15	Manual Trolley Hoists	5	
23.23.17.27.13.17	Hydraulic Trolley Hoists	5	
23.23.19.00	Turntables	2	
23.23.19.11	Stage Turntables	3	
23.23.19.13	Exhibit and Display Turntables	3	
23.23.19.15	Vehicular Turntable	3	
23.23.21.00	Parking Systems	2	
23.23.21.11	Car Parking Systems	3	
23.23.23.00	Loading Dock Equipment	2	
23.23.23.11	Loading Dock Bumpers Seals	3	
23.23.23.13	Dock Levelers	3	
23.23.23.13.11	Powered Dock Levelers	4	
23.23.23.13.13	Manual Dock Levelers	4	
23.23.23.13.15	Hydraulic Dock Levelers	4	
23.23.23.15	Loading Dock Lifts	3	
23.23.23.15.11	Powered Loading Dock Lifts	4	
23.23.23.15.13	Manual Loading Dock Lifts	4	
23.23.23.17	Loading Dock Ramps And Bridges	3	
23.23.23.17.11	Portable Loading Dock Ramps	4	
23.23.23.17.13	Portable Loading Dock Bridges	4	
23.23.23.17.15	Portable Loading Dock Platforms	4	
23.23.23.19	Loading Dock Seals	3	
23.23.23.19.11	Inflatable Loading Dock Seals	4	
23.23.23.19.13	Loading Dock Weather Seals	4	
23.23.23.21	Loading Dock Shelters	3	
23.23.23.23	Loading Dock Vehicle Restraints	3	
23.23.23.23.11	Electric Loading Dock Vehicle Restraints	4	
23.23.23.23.13	Electro Magnetic Loading Dock Vehicle Restraints	4	
23.23.23.23.15	Hydraulic Loading Dock Vehicle Restraints	4	
23.23.25.00	Scaffolding	2	
23.23.25.11	Suspended Scaffolding	3	
23.23.25.11.11	Beam Suspended Scaffolding	4	
23.23.25.11.13	Carriage Suspended Scaffolding	4	
23.23.25.11.15	Hook Suspended Scaffolding	4	
23.23.25.13	Scaffolding Rope Climbers	3	
23.23.25.13.11	Scaffolding Manual Rope Climbers	4	
23.23.25.13.13	Scaffolding Powered Rope Climbers	4	
23.23.25.15	Scaffolding Telescoping Platforms	3	
23.23.25.15.11	Electric and Battery Scaffolding Telescoping Platforms	4	
23.23.25.15.13	Pneumatic Scaffolding Telescoping Platforms	4	
23.23.25.17	Powered Scaffolding	3	
23.25.00.00	Medical and Laboratory Equipment	1	
23.25.11.00	Anesthesiology and Respiratory Products	2	
23.25.11.11	Anesthesiology Furnishings	3	
23.25.11.13	Anesthesiology Equipment	3	
23.25.11.13.11	Anesthesia Carts	4	
23.25.11.13.13	Anesthesia Gas Equipment	4	
23.25.11.13.15	Anesthesia Absorber Units	4	
23.25.11.13.17	Anesthesia Temperature Control Units	4	
23.25.11.13.19	Anesthesia Intrathecal Pumps	4	
23.25.11.13.21	Anesthesia Equipment Calibrators	4	
23.25.11.13.23	Anesthesia Inhalation Analgesia Units	4	
23.25.11.13.23.11	Anesthesia Inhalation Analgesia Central Gases and Vacuum Units	5	
23.25.11.13.23.13	Anesthesia Inhalation Analgesia Central Vacuum Only Units	5	
23.25.11.13.25	Respiratory Monitoring Products	4	
23.25.11.13.25.11	Apnea Monitors	5	
23.25.11.13.25.13	Arterial Blood Gas Monitors	5	
23.25.11.13.25.15	Carbon Dioxide End Tidal Monitors	5	
23.25.11.13.25.17	Esophageal Motility Recording Units	5	
23.25.11.13.25.19	Esophageal Stethoscopes	5	
23.25.11.13.25.21	Oxygen Analyzers	5	
23.25.11.13.25.23	Oxygen Monitors	5	
23.25.11.13.25.25	Respiratory Monitoring Kits	5	
23.25.11.13.27	Pulmonary Function Products	4	
23.25.11.13.27.11	Bedside Pulmonary Function Screeners	5	
23.25.11.13.27.13	Body Plethysmographs	5	
23.25.11.13.27.15	Pneumotachs	5	
23.25.11.13.27.15.11	Lilly Pneumotachs	6	
23.25.11.13.27.15.13	Fleisch Pneumotachs	6	
23.25.11.13.27.17	Pulmonary Calibration Devices	5	
23.25.11.13.27.19	Pulmonary Function Calculators	5	
23.25.11.13.27.21	Pulmonary Function With Computer Analyzers	5	
23.25.11.13.27.23	Pulmonary Gas Analyzers	5	
23.25.11.13.27.25	Pulmonary Gas Monitors	5	
23.25.11.13.27.27	Pulmonary Peak Flowmeters	5	
23.25.11.13.27.29	Pulmonary Pressure Monitors	5	
23.25.11.13.27.31	Pulmonary Ventilation Monitors	5	
23.25.11.13.27.33	Respiratory Temperature Monitors	5	
23.25.11.13.27.35	Sleep Study Monitors	5	
23.25.11.13.27.37	Spirometers	5	
23.25.11.13.27.37.11	Diagnostic Spirometers	6	
23.25.11.13.27.37.13	Monitoring Spirometers	6	
23.25.11.13.27.37.15	Therapeutic Spirometers	6	
23.25.11.13.29	Oxygen Delivery Products	4	
23.25.11.13.29.11	Oxygen Concentrators	5	
23.25.11.13.29.13	Oxygen Air Blenders	5	
23.25.11.13.29.15	Oxygen Timers	5	
23.25.11.13.29.17	Oxygen Compressors	5	
23.25.11.13.29.19	Medical Oxygen Head Hoods	5	
23.25.11.13.29.21	Medical Oxygen Aerosol Tents	5	
23.25.11.13.29.23	Medical Hyperbaric Chambers	5	
23.25.11.13.29.25	Medical Inhalators	5	
23.25.11.13.29.27	Oxygen Therapy Delivery Equipment	5	
23.25.11.13.29.29	Medical Oxygen Insufflators	5	
23.25.11.13.29.31	Liquid Oxygen Converters	5	
23.25.11.13.31	Airway Management Products	4	
23.25.11.13.31.11	Airway Pressure Gages	5	
23.25.11.13.31.13	Pharyngometers	5	
23.25.11.13.33	Intubation Products	4	
23.25.11.13.33.11	Laryngoscopes	5	
23.25.11.13.33.13	Intubation Benders	5	
23.25.11.13.33.15	Intubation Gauges	5	
23.25.11.13.33.17	Carbon Dioxide Patient Detectors	5	
23.25.11.13.33.19	Intubation Suction Pumps	5	
23.25.11.13.35	Negative Pressure Ventilators	4	
23.25.11.13.35.11	Iron Lungs	5	
23.25.11.13.35.13	Chest Cuirass Products	5	
23.25.11.13.37	Positive Pressure Ventilators	4	
23.25.11.13.37.11	Intermittent Positive Pressure Breathing Ventilator Units	5	
23.25.11.13.37.13	Non Invasive Continuous Positive Air Pressure Ventilator Units	5	
23.25.11.13.37.15	Non Invasive Bi Level Ventilator Units	5	
23.25.11.13.37.17	Transport Ventilators	5	
23.25.11.13.37.19	Adult Intensive Care Ventilators	5	
23.25.11.13.37.21	High Frequency Ventilators	5	
23.25.11.13.37.23	Home Care Ventilators	5	
23.25.11.13.37.25	Positive End Expiratory Pressure Ventilator Valves	5	
23.25.11.13.37.27	Ventilator Water Traps	5	
23.25.11.13.37.29	Ventilator Gas Sampling Ports	5	
23.25.11.13.37.31	Ventilator Heat Exchangers	5	
23.25.11.13.37.33	Ventilator Moisture Exchangers	5	
23.25.11.13.39	Resuscitation Products	4	
23.25.11.13.39.11	Manual Resuscitators	5	
23.25.11.13.39.13	Pneumatic Resuscitators	5	
23.25.11.13.39.15	Electro Mechanical Resuscitators	5	
23.25.11.13.41	Lung Fluid Products	4	
23.25.11.13.41.11	Pleural Cavity Drainage Units	5	
23.25.11.15	Anesthesiology Prefabricated Structures	3	
23.25.11.15.11	Anesthesiology Gas Columns	4	
23.25.13.00	Audiology Products	2	
23.25.13.11	Audiology Equipment	3	
23.25.13.11.11	Audiometers	4	
23.25.13.11.11.11	Diagnostic Audiometers	5	
23.25.13.11.11.13	Group Screening Audiometers	5	
23.25.13.11.11.15	Middle Ear Impedance Diagnostic Audiometers	5	
23.25.13.11.13	Audiometric Bone Vibrators	4	
23.25.13.11.15	Middle Ear Analyzers	4	
23.25.13.11.17	Auditory Function Screening Units	4	
23.25.13.11.19	Auditory Test Graphic Recorders	4	
23.25.13.11.21	Auditory Analyzers	4	
23.25.13.11.21.11	Evoked Potential Auditory Analyzers	5	
23.25.13.11.23	Ear Fenestrometers	4	
23.25.13.11.25	Electrocochleographs	4	
23.25.13.11.27	Hearing Aides	4	
23.25.13.11.29	Hearing Aid Analyzers	4	
23.25.13.11.31	Tinnitus Analyzers	4	
23.25.13.11.33	Toynbee Diagnostic Tubes	4	
23.25.13.11.35	Tympanometers	4	
23.25.13.13	Audiology Prefabricated Structures	3	
23.25.13.13.11	Audio Booths	4	
23.25.13.13.13	Double Wall Audio Booths	4	
23.25.13.13.13.11	Definitive Test Double Wall Audio Booths	5	
23.25.13.13.15	Single Wall Audio Booths	4	
23.25.13.13.17	Acoustic Hearing Test Chambers	4	
23.25.15.00	Autopsy and Postmortem Products	2	
23.25.15.11	Autopsy and Postmortem Furnishings	3	
23.25.15.11.11	Postmortem Refrigerators and Freezers	4	
23.25.15.11.11.11	Cadaver Cabinet Refrigerators	5	
23.25.15.11.11.13	Cadaver Freezers	5	
23.25.15.11.11.15	Cadaver Refrigerated Rooms	5	
23.25.15.11.11.17	Cadaver Refrigerators	5	
23.25.15.11.11.19	Cadaver Walk In Refrigerators	5	
23.25.15.11.13	Autopsy Tables	4	
23.25.15.11.13.11	Autopsy Body Boards	5	
23.25.15.11.13.13	Autopsy Dissecting Tank Tables	5	
23.25.15.11.13.15	Autopsy Head Rests	5	
23.25.15.11.13.17	Autopsy Sinks	5	
23.25.15.11.13.19	Mobile Autopsy Tables	5	
23.25.15.11.13.21	Stationary Autopsy Tables	5	
23.25.15.11.15	Embalming Sinks	4	
23.25.15.13	Autopsy and Postmortem Equipment	3	
23.25.15.13.11	Cadaver Lifts	4	
23.25.15.13.11.11	Cadaver Electric Lifts	5	
23.25.15.13.11.13	Cadaver Hydraulic Lifts	5	
23.25.15.13.11.15	Cadaver Scissor Lift Trolleys	5	
23.25.15.13.13	Autopsy Equipment	4	
23.25.15.13.13.11	Autopsy Fluid Collection Vacuum Aspirators	5	
23.25.15.13.13.13	Autopsy Hanging Scales	5	
23.25.15.13.13.15	Autopsy Saws	5	
23.25.15.13.13.17	Bone Dust Collectors	5	
23.25.15.13.15	Cadaver Transport And Storage Products	4	
23.25.15.13.15.11	Autopsy Carts	5	
23.25.15.13.15.13	Body Transport Containers	5	
23.25.15.13.15.15	Cadaver Carriers	5	
23.25.15.13.15.17	Cadaver Lifter Or Transfer Devices	5	
23.25.15.13.15.19	Cadaver Storage Cabinets	5	
23.25.15.13.15.21	Cadaver Storage Racks	5	
23.25.15.13.15.23	Cadaver Trays	5	
23.25.15.15	Autopsy and Postmortem Prefabricated Structures	3	
23.25.15.15.11	Autopsy Workstations	4	
23.25.15.15.11.11	Autopsy Grossing Workstations	5	
23.25.15.15.11.13	Embalming Workstations	5	
23.25.15.15.11.15	Autopsy Down Draft Workstations	5	
23.25.15.17	Autopsy and Postmortem Devices	3	
23.25.17.00	Dental Products	2	
23.25.17.11	Dental Furnishings	3	
23.25.17.11.11	Dental Cabinets	4	
23.25.17.11.11.11	Mobile Dental Cabinets	5	
23.25.17.11.11.13	Dental Operating Stool	5	
23.25.17.11.13	Dental Examination Chairs	4	
23.25.17.11.15	Dental Stools	4	
23.25.17.11.17	Dental Cabinets	4	
23.25.17.11.19	Dental Tables	4	
23.25.17.11.21	Dental Combination Furniture Sets	4	
23.25.17.11.23	Dental Impression Water Baths	4	
23.25.17.11.25	Dental Lighting Products	4	
23.25.17.11.25.11	Dental Fiber Optic Lights	5	
23.25.17.11.25.13	Dental Operating Illumination Sets	5	
23.25.17.11.25.15	Dental Operating Light Tripods	5	
23.25.17.11.25.17	General Dental Lights	5	
23.25.17.13	Dental Equipment	3	
23.25.17.13.11	Dental Furnaces	4	
23.25.17.13.11.11	Dental Burnout Laboratory Furnaces	5	
23.25.17.13.11.13	Porcelain Glazing Laboratory Furnaces	5	
23.25.17.13.11.15	Vacuum Porcelain Furnaces	5	
23.25.17.13.13	Dental Specialized Hoods	4	
23.25.17.13.13.11	Dental Acrylic Floor Standing Fume Hoods	5	
23.25.17.13.13.13	Dental Fishmouth Hoods	5	
23.25.17.13.13.15	Dental Splash Hoods	5	
23.25.17.13.13.17	Dental Splash Hoods with Shield	5	
23.25.17.13.15	Dental Procedure Products	4	
23.25.17.13.15.01	Calcium Hydroxide Placement Tools	5	
23.25.17.13.15.03	Composite Placement Tools	5	
23.25.17.13.15.05	Crown Or Bridge Removers	5	
23.25.17.13.15.07	Dental Amalgam Carvers	5	
23.25.17.13.15.09	Dental Amalgamator	5	
23.25.17.13.15.11	Dental Anesthesia Sets	5	
23.25.17.13.15.13	Dental Bur Holders	5	
23.25.17.13.15.15	Dental Burnishers	5	
23.25.17.13.15.17	Dental Burs	5	
23.25.17.13.15.19	Dental Calipers	5	
23.25.17.13.15.21	Dental Cryosurgical Units	5	
23.25.17.13.15.23	Dental Dehydrators	5	
23.25.17.13.15.25	Dental Depth Gauges	5	
23.25.17.13.15.27	Dental Drills	5	
23.25.17.13.15.29	Dental Elevators	5	
23.25.17.13.15.31	Dental Excavators	5	
23.25.17.13.15.33	Dental Expanders	5	
23.25.17.13.15.35	Dental Filler Contouring Instruments	5	
23.25.17.13.15.37	Dental Fracture Detecting Tools	5	
23.25.17.13.15.39	Dental Gages	5	
23.25.17.13.15.41	Dental Guides	5	
23.25.17.13.15.43	Dental Heat Carriers	5	
23.25.17.13.15.45	Dental Hygiene Instruments	5	
23.25.17.13.15.47	Dental Instrument Cassettes	5	
23.25.17.13.15.49	Dental Instrument Sharpening Equipment	5	
23.25.17.13.15.51	Dental Instrument Trays	5	
23.25.17.13.15.53	Dental Instruments Mats	5	
23.25.17.13.15.55	Dental Lasers	5	
23.25.17.13.15.57	Dental Mallets	5	
23.25.17.13.15.59	Dental Mixing Slabs	5	
23.25.17.13.15.61	Dental Nippers	5	
23.25.17.13.15.63	Dental Operative Brushes	5	
23.25.17.13.15.65	Dental Oral Suction Devices	5	
23.25.17.13.15.67	Dental Pin Benders	5	
23.25.17.13.15.69	Dental Pin Drivers	5	
23.25.17.13.15.71	Dental Placement Instruments	5	
23.25.17.13.15.73	Dental Pulp Testers	5	
23.25.17.13.15.75	Dental Reamers	5	
23.25.17.13.15.77	Dental Retraction Cord Packing Instruments	5	
23.25.17.13.15.79	Dental Retractors	5	
23.25.17.13.15.81	Dental Saliva Ejectors	5	
23.25.17.13.15.83	Dental Scalers	5	
23.25.17.13.15.85	Dental Spreaders	5	
23.25.17.13.15.87	Dental Tooth Separators	5	
23.25.17.13.15.89	Dental Vitality Testers	5	
23.25.17.13.15.91	Dentoscopes	5	
23.25.17.13.15.93	Intraoral Lights	5	
23.25.17.13.15.95	Pneumatic Dental Chisels	5	
23.25.17.13.15.97	Temporomandibular Joint (TMJ) Dental Videoscopes	5	
23.25.17.13.17	Dental Tanks	4	
23.25.17.13.17.11	Dental Blow Out Tanks	5	
23.25.17.13.17.13	Dental Curing Tanks	5	
23.25.17.13.17.15	Dental Washout Blow Out Tanks	5	
23.25.17.13.19	Dental Polishing and Grinding Machines	4	
23.25.17.13.19.11	Dental Combination Grinding and Polishing Machines	5	
23.25.17.13.19.13	Dental Grinding Machines	5	
23.25.17.13.19.15	Dental Polishing Machines	5	
23.25.17.13.21	Dental Imaging Products	4	
23.25.17.13.21.11	Cephalometric Radiographic Fluoroscopic Units	5	
23.25.17.13.21.13	Dental Film Processors	5	
23.25.17.13.21.15	Dental Radioactive Tracers	5	
23.25.17.13.21.17	Dental Radiographic Fluoroscopic Units	5	
23.25.17.13.21.17.11	Panographic Cephalo Dental Radiographic Fluoroscopic Units	6	
23.25.17.13.21.17.13	Panographic Dental Radiographic Fluoroscopic Units	6	
23.25.17.13.21.19	Dental Radiography Film Analyzers	5	
23.25.17.13.21.21	Dental Radiology Film Hangers	5	
23.25.17.13.21.23	Dental Radiology Film Holders	5	
23.25.17.13.21.25	Dental Radiology Film Mounts	5	
23.25.17.13.21.27	Dental X Ray Duplicators	5	
23.25.17.13.21.29	Dental X Ray Units	5	
23.25.17.13.21.31	Dental X Ray Viewers	5	
23.25.17.13.23	Dental Sterilization Products	4	
23.25.17.13.23.11	Dental Steam Cleaners	5	
23.25.17.13.25	Dental Laboratory Products	4	
23.25.17.13.25.11	Dental Air Abrasion Units	5	
23.25.17.13.25.13	Dental Burners	5	
23.25.17.13.25.15	Dental Casting Machines	5	
23.25.17.13.25.17	Dental Curing Units	5	
23.25.17.13.25.17.11	2 Stage Dental Curing Units	6	
23.25.17.13.25.17.13	3 Stage Dental Curing Units	6	
23.25.17.13.25.19	Dental Dust Collectors	5	
23.25.17.13.25.21	Dental Gold Platers	5	
23.25.17.13.25.23	Dental Lathes	5	
23.25.17.13.25.25	Dental Model Trimmers	5	
23.25.17.13.25.27	Dental Models	5	
23.25.17.13.25.29	Dental Plaster Traps	5	
23.25.17.13.25.31	Dental Resin Curing Units	5	
23.25.17.13.25.31.11	 Dental Visible Light Resin Curing Units	6	
23.25.17.13.25.33	Dental Resins Processing Units	5	
23.25.17.13.25.35	Dental Sandblasters	5	
23.25.17.13.25.37	Dental Soldering Machines	5	
23.25.17.13.25.39	Dental Torches	5	
23.25.17.13.25.41	Dental Vacuum Units	5	
23.25.17.13.25.43	Dental Vibrators	5	
23.25.17.13.25.45	Dental Waxing Units	5	
23.25.17.15	Dental Prefabricated Structures	3	
23.25.17.15.11	Dental Lab Workcenters	4	
23.25.17.15.11.11	Dental Lab Die Trimming Workcenters	5	
23.25.17.15.11.13	Dental Lab Equipment Workcenters	5	
23.25.17.15.11.15	Dental Lab Metal Grinding Workcenters	5	
23.25.17.15.11.17	Dental Lab Microblasting Workcenters	5	
23.25.17.15.11.19	Dental Lab Plaster Workcenters	5	
23.25.17.15.11.21	Dental Lab Polishing Workcenters	5	
23.25.17.15.11.23	Dental Lab Surveying and Milling Workcenters	5	
23.25.19.00	Dermatology Products	2	
23.25.19.11	Dermatology Furnishings	3	
23.25.19.13	Dermatology Equipment	3	
23.25.19.13.11	Phototherapy Products	4	
23.25.19.13.11.11	Phototherapy Air Circulators	5	
23.25.19.13.11.13	Phototherapy Blankets	5	
23.25.19.13.11.15	Phototherapy Light Mats	5	
23.25.19.13.11.17	Phototherapy Patient Protection Devices	5	
23.25.19.13.11.19	Phototherapy Power Units	5	
23.25.19.13.11.21	Phototherapy Warmer Beds	5	
23.25.19.15	Dermatology Prefabricated Structures	3	
23.25.19.15.11	Ultraviolet Treatment Booths	4	
23.25.19.15.13	Hand and Foot Ultraviolet Treatment Booths	4	
23.25.19.17	Dermatology Devices	3	
23.25.21.00	Emergency Trauma and Intensive Care Products	2	
23.25.21.11	Emergency Trauma and Intensive Furnishings	3	
23.25.21.11.11	Catheter Storage Cabinets	4	
23.25.21.13	Emergency Trauma and Intensive Equipment	3	
23.25.21.13.11	Emergency Carts	4	
23.25.21.13.13	Emergency Transportation Products	4	
23.25.21.13.13.11	Air Evacuation Stretchers 	5	
23.25.21.13.13.13	Ambulance Cots	5	
23.25.21.13.13.15	Anti Shock Garments	5	
23.25.21.13.13.17	Basket Stretchers	5	
23.25.21.13.13.19	Scoop Stretchers	5	
23.25.21.13.13.21	Spine Boards	5	
23.25.21.13.13.23	Water Rescue Tubes	5	
23.25.21.13.15	Emergency Airway Management Products	4	
23.25.21.13.15.11	Emergency Laryngoscope Kits	5	
23.25.21.13.15.13	Emergency Oropharyngeal Airway Devices	5	
23.25.21.13.15.15	Emergency Suction Units	5	
23.25.21.13.15.17	Emergency Tracheal Tube Kits	5	
23.25.21.13.17	Emergency Kits	4	
23.25.21.13.17.11	Emergency Dental Kits	5	
23.25.21.13.17.13	Emergency First Aid Kits	5	
23.25.21.13.17.15	Emergency Fracture Kits	5	
23.25.21.13.17.17	Emergency Intravenous IV Kits	5	
23.25.21.13.17.19	Emergency Medical First Response Kits	5	
23.25.21.13.17.21	Emergency Medical Technician Kits	5	
23.25.21.13.17.23	Emergency Obstetrics Kits	5	
23.25.21.13.17.25	Emergency Resuscitation Kits	5	
23.25.21.13.17.27	Emergency Services Trauma Kits	5	
23.25.21.13.17.29	Emergency Ventriculostomy Kits	5	
23.25.21.13.19	Emergency Resuscitation Products	4	
23.25.21.13.19.11	Diefibrillators	5	
23.25.21.13.19.11.11	Acute Care Defibrillators	6	
23.25.21.13.19.11.13	Acute Care Defibrillator With Monitors	6	
23.25.21.13.19.11.15	Automatic Defibrillators	6	
23.25.21.13.19.11.17	Defibrillator with Cardioscopes	6	
23.25.21.13.19.11.19	Portable Defibrillators	6	
23.25.21.13.19.13	Defibrillator Analyzers	5	
23.25.21.13.19.15	Emergency Aspirators	5	
23.25.21.13.19.17	Emergency Resuscitators	5	
23.25.21.13.19.17.11	Emergency Manual Resuscitators	6	
23.25.21.13.19.17.13	Emergency Pulmonary Resuscitators	6	
23.25.21.13.19.17.15	Emergency Oxygen Powered Resuscitators	6	
23.25.21.13.21	Acute Care Monitoring Units	4	
23.25.21.13.21.11	Acute Care Fetal Monitoring Units	5	
23.25.21.13.21.13	Acute Care Maternal Monitoring Units	5	
23.25.21.13.21.15	Cardiac Output Monitoring Units	5	
23.25.21.13.21.17	Intracranial Pressure Monitoring Units	5	
23.25.21.13.21.19	Multiparameter Vital Sign Units	5	
23.25.21.15	Emergency Trauma and Intensive Prefabricated Structures	3	
23.25.21.15.11	Intensive Care Unit Prefabricated Service Columns	4	
23.25.21.15.13	Trauma Workcenters	4	
23.25.23.00	Endocrinology Products	2	
23.25.23.11	Endocrinology Furnishings	3	
23.25.23.11.11	Dialysis Chairs	4	
23.25.23.11.13	Dialysis Tables	4	
23.25.23.13	Endocrinology Equipment	3	
23.25.23.13.11	Peritoneal Dialysis Products	4	
23.25.23.13.11.11	Continuous Ambulatory Peritoneal Dialysis Transfer Units	5	
23.25.23.13.11.13	Dialysis Boxes	5	
23.25.23.13.11.15	Pheresis Units	5	
23.25.23.13.11.17	Peritoneal Dialysis Units	5	
23.25.23.13.11.17.11	Hollow Peritoneal Dialysis Units	6	
23.25.23.13.13	Hemodialysis Products	4	
23.25.23.13.13.11	Hemodialysis Blood Oxygen Demand Units	5	
23.25.23.13.13.13	Hemodialysis Conductivity Meters	5	
23.25.23.13.13.15	Hemodialysis Filters	5	
23.25.23.13.13.17	Hemodialysis Level Detectors	5	
23.25.23.13.13.19	Hemodialysis Pressure Pumps	5	
23.25.23.13.13.21	Hemodialysis Reprocessing Units	5	
23.25.23.13.13.23	Hemodialysis Tanks	5	
23.25.23.13.13.25	Hemodialysis Unit Arterial Pressure Monitors	5	
23.25.23.13.13.27	Hemodialysis Unit Blood Pumps	5	
23.25.23.13.13.29	Hemodialysis Unit Heparin Infusion Pumps	5	
23.25.23.13.13.31	Hemodialysis Unit Single Pass Converters	5	
23.25.23.13.13.33	Hemodialysis Unit Stands	5	
23.25.23.13.13.35	Hemodialysis Unit Temperature Monitors	5	
23.25.23.13.13.37	Hemodialysis Unit Test Equipment	5	
23.25.23.13.13.39	Hemodialysis Units	5	
23.25.23.13.13.41	Hemodialysis Warming Baths	5	
23.25.23.13.15	Continuous Renal Replacement Therapy Products	4	
23.25.23.13.15.11	Continuous Arteriovenous Dialysis Units	5	
23.25.23.13.15.13	Continuous Arteriovenous Hemofiltration Units	5	
23.25.23.13.15.15	Continuous Venovenous Hemodialysis Units	5	
23.25.23.13.15.17	Continuous Venovenous Hemofiltration Units	5	
23.25.23.13.15.19	Renal Dialysis Cartridge Flushing Units	5	
23.25.23.13.15.21	Slow Continuous Ultrafiltration Units	5	
23.25.23.15	Endocrinology Prefabricated Structures	3	
23.25.25.00	Gastroenterology and Hepatology Products	2	
23.25.25.11	Gastroenterology Furnishings	3	
23.25.25.11.11	Proctology Examination Tables	4	
23.25.25.11.13	Urological Procedure Table	4	
23.25.25.11.13.11	Endoscope Storage Cabinets	5	
23.25.25.11.13.13	Endoscope Wall Hangers	5	
23.25.25.11.13.15	Endoscopic Procedure Carts	5	
23.25.25.13	Gastroenterology Equipment	3	
23.25.25.15	Gastroenterology Prefabricated Structures	3	
23.25.25.17	Gastroenterology Devices	3	
23.25.27.00	General Internal Medicine Products	2	
23.25.27.11	General Internal Medicine Furnishings	3	
23.25.27.11.11	Intravenous Transport Products	4	
23.25.27.11.11.11	Intravenous Equipment Hangers	5	
23.25.27.11.11.13	Intravenous Infusion Gravity Systems Mounted Racks	5	
23.25.27.11.11.15	Intravenous Infusion Gravity Systems Mounted Tracks 	5	
23.25.27.11.11.17	Intravenous Line Poles	5	
23.25.27.11.11.19	Intravenous Line Stands	5	
23.25.27.11.11.21	Intravenous Wheelchair Poles	5	
23.25.27.13	General Internal Medicine Equipment	3	
23.25.27.13.11	Endoscopy Carts	4	
23.25.27.13.11.11	Fiberoptic Endoscopy Carts	5	
23.25.27.13.11.11.11	Basic Fiberoptic Endoscopy Carts	6	
23.25.27.13.11.11.13	Fiberoptic Endoscopy Carts With Video Accessories	6	
23.25.27.13.11.11.15	Fiberoptic Endoscopy Carts With Video Accessories And Information Management	6	
23.25.27.13.11.13	Video Endoscopy Carts	5	
23.25.27.13.11.13.11	Video Endoscopy Carts CCD Scope And Information Management	6	
23.25.27.13.13	Intravenous Pump Products	4	
23.25.27.13.13.11	General Use Intravenous Pumps	5	
23.25.27.13.13.13	Intravenous Infusion Pump Analyzers	5	
23.25.27.13.13.15	Intravenous Infusion Pump Sensors	5	
23.25.27.13.13.17	Intravenous Infusion Pump Transducers	5	
23.25.27.13.13.19	Intravenous Syringe Pumps	5	
23.25.27.13.13.21	Multichannel Intravenous Pumps	5	
23.25.27.13.15	Urological Products	4	
23.25.27.13.15.11	Cystometry Transducers	5	
23.25.27.13.15.13	Urethral Sound Sets	5	
23.25.27.13.15.15	Urethral Stone Remover Sets	5	
23.25.27.13.15.17	Urodynamic Catheters	5	
23.25.27.13.15.19	Urological Percolators	5	
23.25.27.13.17	Endoscopes Products	4	
23.25.27.13.17.11	Rigid Endoscopes	5	
23.25.27.13.17.13	Flexible Endoscopes	5	
23.25.27.13.17.15	Cystourethroscopes	5	
23.25.27.13.17.17	Resectoscopes	5	
23.25.27.13.17.19	Laparoscopes	5	
23.25.27.13.17.21	Laparoscopic Telescopes	5	
23.25.27.13.17.23	Cystoscopes	5	
23.25.27.13.17.25	Endoscopic Sphincterotomes	5	
23.25.27.13.17.27	Duodenoscopes	5	
23.25.27.13.17.27.11	Combination Duodenoscope and Choledochoscopes	6	
23.25.27.13.17.27.13	Therapeutic Duodenoscopes	6	
23.25.27.13.17.27.15	Fiberoptic Therapeutic Duodenoscopes	6	
23.25.27.13.17.27.17	Video Therapeutic Duodenoscopes	6	
23.25.27.13.17.29	Esophagoscopes	5	
23.25.27.13.17.31	Endoscopic Equipment Sets	5	
23.25.27.13.17.33	Endoscopic Heater Probe Units	5	
23.25.27.13.17.35	Endoscopic Imaging Equipment	5	
23.25.27.13.17.37	Endoscopic Insufflation Units	5	
23.25.27.13.17.39	Endoscopic Distention Units	5	
23.25.27.13.17.41	Endoscopic Printers	5	
23.25.27.13.17.43	Endoscopic Video Cameras	5	
23.25.27.13.17.45	Endoscopic Recorders	5	
23.25.27.13.17.47	Enteroscopes	5	
23.25.27.13.17.47.11	Therapeutic Fiberoptic Enteroscopes	6	
23.25.27.13.17.47.13	Therapeutic Video Enteroscopes	6	
23.25.27.13.19	Gastroscope Products	4	
23.25.27.13.19.11	Therapeutic Fiberoptic Gastroscopes	5	
23.25.27.13.19.13	Therapeutic Video Gastroscopes	5	
23.25.27.13.21	Sigmoidoscope Products	4	
23.25.27.13.21.11	Therapeutic Sigmoidoscopes	5	
23.25.27.13.21.13	Fiberoptic Therapeutic Sigmoidoscopes	5	
23.25.27.13.21.15	Video Therapeutic Sigmoidoscopes	5	
23.25.27.13.23	Colonoscopy Products	4	
23.25.27.13.23.11	Mobile Colonoscope System With Accessories	5	
23.25.27.13.23.13	Therapeutic Colonoscopes	5	
23.25.27.13.23.13.11	Fiberoptic Therapeutic Colonoscopes	6	
23.25.27.13.23.13.13	Video Therapeutic Colonoscopes	6	
23.25.27.15	General Internal Medicine Prefabricated Structures	3	
23.25.29.00	Therapeutic and Physical Therapy Products	2	
23.25.29.11	Therapeutic and Physical Therapy Furnishings	3	
23.25.29.11.11	Therapeutic Baths	4	
23.25.29.11.11.11	Hydrotherapy Baths	5	
23.25.29.11.11.11.11	Body Hydrotherapy Baths	6	
23.25.29.11.11.11.13	Burn Hydrotherapy Baths	6	
23.25.29.11.11.11.15	Burn Hydrotherapy With Lift Baths	6	
23.25.29.11.11.11.17	Hydrotherapy With Elevating Tub Baths	6	
23.25.29.11.11.11.19	Sitting Hydrotherapy Baths	6	
23.25.29.11.11.13	Therapeutic Refrigerated Circulating Water Baths	5	
23.25.29.11.13	Therapeutic Tables	4	
23.25.29.11.13.11	Chiropractic Tables	5	
23.25.29.11.13.13	Therapeutic Massage Tables	5	
23.25.29.11.13.15	Traction Physical Therapy Tables	5	
23.25.29.13	Therapeutic and Physical Therapy Equipment	3	
23.25.29.13.11	Physical Therapy Traction Equipment	4	
23.25.29.13.11.11	Traction Appliances Carts	5	
23.25.29.13.13	Therapeutic Exercise Equipment	4	
23.25.29.13.13.11	Balance Beams	5	
23.25.29.13.13.13	Therapeutic Exercise Balance Boards	5	
23.25.29.13.13.15	Therapeutic Exercise Balance Bolsters	5	
23.25.29.13.13.17	Therapeutic Exercise Balance Rockers	5	
23.25.29.13.13.19	Therapeutic Exercise Climbing Equipment	5	
23.25.29.13.13.21	Therapeutic Exercise Continuous Passive Motion CPM Equipment	5	
23.25.29.13.13.23	Therapeutic Exercise Skates	5	
23.25.29.13.13.25	Therapeutic Exercise Free Weights	5	
23.25.29.13.13.27	Therapeutic Lung Exercisers	5	
23.25.29.13.13.29	Therapeutic Exercise Mats	5	
23.25.29.13.13.31	Therapeutic Exercise Platforms	5	
23.25.29.13.13.33	Therapeutic Exercise Pulleys	5	
23.25.29.13.13.35	Therapeutic Exercise Resistive Equipment	5	
23.25.29.13.13.37	Therapeutic Exercise Skateboards	5	
23.25.29.13.13.39	Therapeutic Exercise Therapeutic Balls	5	
23.25.29.13.13.41	Therapeutic Exercise Treadmills	5	
23.25.29.13.13.43	Therapeutic Exercise Vestibular Motion Equipment	5	
23.25.29.13.13.45	Therapeutic Exercise Weight Belts	5	
23.25.29.13.13.47	Therapeutic Exercise Weight Machines	5	
23.25.29.13.13.49	Therapeutic Exercise Wrist Exercisers	5	
23.25.29.13.15	Gait Training Products	4	
23.25.29.13.15.11	Gait Training Bars	5	
23.25.29.13.15.13	Gait Training Bikes	5	
23.25.29.13.15.15	Gait Training Parallel Bars	5	
23.25.29.13.15.17	Gait Training Ramps	5	
23.25.29.13.15.19	Gait Training Stairs	5	
23.25.29.13.15.21	Gait Training Walkers	5	
23.25.29.13.17	Electrotherapy Equipment	4	
23.25.29.13.17.11	Electrotherapy Combination Units	5	
23.25.29.13.17.13	Galvanic Stimulators	5	
23.25.29.13.17.15	Faradic Stimulators	5	
23.25.29.13.17.17	Neuromuscular Stimulators	5	
23.25.29.13.17.17.11	Multi Channel Neuromuscular Stimulators	6	
23.25.29.13.17.17.13	interferential Neuromuscular Stimulators	6	
23.25.29.13.17.17.15	Portable Neuromuscular Stimulators	6	
23.25.29.13.17.19	Therapeutic Short Wave Diathermy Units	5	
23.25.29.13.17.21	Transcutaneous Electric Nerve Stimulation Units	5	
23.25.29.13.19	Heat Cold Therapy Products	4	
23.25.29.13.19.11	Therapeutic Cold Storage Chilling Units	5	
23.25.29.13.19.13	Therapeutic  Heat Lamps	5	
23.25.29.13.19.15	Therapeutic Hydrocollators	5	
23.25.29.13.19.17	Therapeutic Combination Heating Cooling Units	5	
23.25.29.13.19.19	Therapeutic Cooling Blankets	5	
23.25.29.13.19.21	Therapeutic Cooling Drapes	5	
23.25.29.13.19.23	Therapeutic Cooling Units	5	
23.25.29.13.19.25	Therapeutic Cryo Compression Equipment	5	
23.25.29.13.19.27	Therapeutic Heating Blankets	5	
23.25.29.13.19.29	Therapeutic Heating Drapes	5	
23.25.29.13.19.31	Therapeutic Heating Units	5	
23.25.29.13.19.33	Therapeutic Paraffin Baths	5	
23.25.29.13.21	Hydrotherapy Products	4	
23.25.29.13.21.11	Extremity Hydrotherapy Baths	5	
23.25.29.13.21.13	Extremity Hydrotherapy Tanks	5	
23.25.29.13.21.15	Full Body Immersion Hydrotherapy Baths	5	
23.25.29.13.21.17	Full Body Immersion Hydrotherapy Tanks	5	
23.25.29.13.21.19	Hydrotherapy Bath Chairs	5	
23.25.29.13.23	Hypothermia and Hyperthermia Units	4	
23.25.29.13.23.11	Combination Hyperthermia and Hypothermia Units	5	
23.25.29.13.23.13	Hyperthermia Units	5	
23.25.29.13.23.15	Hypothermia Units	5	
23.25.29.13.23.17	Mobile Combination Hyperthermia and Hypothermia Units	5	
23.25.29.13.23.19	Mobile Hyperthermia Units	5	
23.25.29.13.23.21	Mobile Hypothermia Units	5	
23.25.29.15	Health Exercise and Physical Therapy Prefabricated Structures	3	
23.25.29.15.11	Nourishment Stations	4	
23.25.31.00	Hematology Products	2	
23.25.31.11	Hematology Furnishings	3	
23.25.31.11.11	Blood Refrigerators and Freezers	4	
23.25.31.11.11.11	Blood Bank Refrigerators	5	
23.25.31.11.11.13	Blood Freezers	5	
23.25.31.11.11.13.11	Double Compartment Blood Freezers	6	
23.25.31.11.11.13.13	Blood Plasma Freezers	6	
23.25.31.11.11.15	Dry Tissue Freezers	5	
23.25.31.11.11.17	Plasma Storage Freezers	5	
23.25.31.11.13	Hematology Baths	4	
23.25.31.11.13.11	Serology Water Baths	5	
23.25.31.11.13.13	Tissue Processing Water Baths	5	
23.25.31.11.15	Hematology Cabinets	4	
23.25.31.11.15.11	Paraffin Block Cabinets	5	
23.25.31.13	Hematology Equipment	3	
23.25.31.13.11	Hematology Analyzers	4	
23.25.31.13.11.11	Blood Lead Analyzers	5	
23.25.31.13.11.13	BUN Analyzers	5	
23.25.31.13.11.13.11	Discrete BUN Analyzers	6	
23.25.31.13.11.15	PH Blood Gas Analyzers	5	
23.25.31.13.11.17	Blood Typing Centrifuges	5	
23.25.31.13.13	Blood And Transfusion Products	4	
23.25.31.13.13.11	Blood Conservation Equipment	5	
23.25.31.13.13.13	Blood Containers	5	
23.25.31.13.13.15	Blood Transfusion Equipment	5	
23.25.31.13.13.17	Blood Warming and Transfusion Equipment	5	
23.25.31.13.13.19	Blood Warming Equipment	5	
23.25.31.13.13.21	Blood Waste Collection Equipment	5	
23.25.31.15	Hematology Prefabricated Structures	3	
23.25.31.15.11	Blood Bank Workcenters	4	
23.25.31.15.13	Hematology Workcenters	4	
23.25.33.00	Medical Gas Products	2	
23.25.33.11	Medical Air Pressure Control Cabinets	3	
23.25.33.13	Medical Gas Alarm Modules	3	
23.25.33.15	Medical Gas Cylinder Carts	3	
23.25.33.17	Medical Gas Cylinder Stands	3	
23.25.33.19	Medical Gas Delivery Columns	3	
23.25.33.21	Medical Gas Filtering Equipment	3	
23.25.33.23	Medical Gas Manifolds	3	
23.25.33.25	Medical Gas Outlets	3	
23.25.33.27	Medical Gas Service Tracks	3	
23.25.33.29	Medical Gas Shutoff Valves	3	
23.25.33.31	Medical Gas Treatment Equipment	3	
23.25.33.33	Medical Gas Valve Boxes	3	
23.25.35.00	Nursing Products	2	
23.25.35.11	Nursing Furnishings	3	
23.25.35.11.11	Freestanding Nursing Table Bath and Showers	4	
23.25.35.13	Nursing Equipment	3	
23.25.35.13.11	Nursing Station Telecommunications Equipment	4	
23.25.35.13.11.11	Nurse Communication Modules	5	
23.25.35.13.11.13	Nurse Intercoms	5	
23.25.35.13.11.15	Nurse Room Control Equipment	5	
23.25.35.13.11.17	Nurse Room Control Exit Monitors	5	
23.25.35.15	Nursing Prefabricated Structures	3	
23.25.35.15.11	Nurse Stations	4	
23.25.37.00	Obstetrics and Gynecology Products	2	
23.25.37.11	Obstetrics and Gynecology Furnishings	3	
23.25.37.11.11	Obstetrics and Gynecology Beds	4	
23.25.37.11.11.11	Birthing Beds	5	
23.25.37.11.11.13	Electric Birthing Beds	5	
23.25.37.11.13	Obstetrics and Gynecology Tables	4	
23.25.37.11.13.11	Beast Biopsy Tables	5	
23.25.37.11.13.13	Gynecological Exam Tables	5	
23.25.37.11.13.15	Obstetrical Examination Tables	5	
23.25.37.13	Obstetrics and Gynecology Equipment	3	
23.25.37.13.11	Obstetrics and Gynecology Carts	4	
23.25.37.13.11.11	Fetal Monitoring Carts	5	
23.25.37.13.13	Breast Biopsy Products	4	
23.25.37.13.13.11	Minimally Invasive Breast Biopsy Premium Loading Units	5	
23.25.37.13.13.13	Minimally Invasive Breast Biopsy Vacuum Units	5	
23.25.37.15	Obstetrics and Gynecology Prefabricated Structures	3	
23.25.39.00	Ophthalmology Products	2	
23.25.39.11	Ophthalmology Furnishings	3	
23.25.39.11.11	Ophthalmology Tables	4	
23.25.39.11.11.11	Ophthalmologic Instrument Tables	5	
23.25.39.11.13	Ophthalmology Cabinets	4	
23.25.39.11.13.11	Lens Measuring Instrument Cabinets	5	
23.25.39.13	Ophthalmology Equipment	3	
23.25.39.13.11	Ophthalmic Diagnostic Exam Products	4	
23.25.39.13.11.11	Autorefractors	5	
23.25.39.13.11.13	Binocular Vision Test Sets	5	
23.25.39.13.11.15	Chart Projectors	5	
23.25.39.13.11.17	Color Perception Testing Lanterns	5	
23.25.39.13.11.19	Combination Refractor Keratometers	5	
23.25.39.13.11.21	Contact Lens Gonioscope	5	
23.25.39.13.11.23	Corneal Topographers	5	
23.25.39.13.11.25	Corneal Topography Units	5	
23.25.39.13.11.27	Depth Perception Units	5	
23.25.39.13.11.29	Electronystagmographs	5	
23.25.39.13.11.31	Electroretinogram Systems	5	
23.25.39.13.11.33	Exophthalmometers	5	
23.25.39.13.11.35	Eye Occluders	5	
23.25.39.13.11.37	Keratometer Ophthalmometers	5	
23.25.39.13.11.39	Keratoscopes	5	
23.25.39.13.11.41	Ophthalmic Colorimeters	5	
23.25.39.13.11.43	Ophthalmic Distometers	5	
23.25.39.13.11.45	Ophthalmic Drums	5	
23.25.39.13.11.47	Ophthalmic Euthyscopes	5	
23.25.39.13.11.49	Ophthalmic Eye Test Lenses	5	
23.25.39.13.11.51	Ophthalmic Instrument Pads	5	
23.25.39.13.11.53	Ophthalmic Instrument Tables	5	
23.25.39.13.11.55	Ophthalmic Lens Holders	5	
23.25.39.13.11.57	Ophthalmic Lensometers	5	
23.25.39.13.11.57.11	Ophthalmic Soft Contract Lensometers	6	
23.25.39.13.11.59	Ophthalmic Perimeters	5	
23.25.39.13.11.61	Ophthalmic Photometers	5	
23.25.39.13.11.63	Ophthalmic Prisms	5	
23.25.39.13.11.65	Ophthalmic Retinoscope Accessories	5	
23.25.39.13.11.67	Ophthalmic Retinoscopes	5	
23.25.39.13.11.69	Ophthalmic Slit Lamps	5	
23.25.39.13.11.71	Ophthalmic Spectrophotometers	5	
23.25.39.13.11.73	Ophthalmic Speculas	5	
23.25.39.13.11.75	Ophthalmic Tonometers	5	
23.25.39.13.11.75.11	Ophthalmic Applanation Tonometers	6	
23.25.39.13.11.75.13	Ophthalmic Noncontact Tonometers	6	
23.25.39.13.11.77	Ophthalmic Transilluminators	5	
23.25.39.13.11.79	Ophthalmic Visual Field Plotters	5	
23.25.39.13.11.81	Ophthalmic Visual Function Analyzers	5	
23.25.39.13.11.83	Ophthalmic Visuometers	5	
23.25.39.13.11.85	Ophthalmodynamometers	5	
23.25.39.13.11.87	Ophthalmometers	5	
23.25.39.13.11.89	Opthalmometer Base Plates	5	
23.25.39.13.11.91	Pachymeters	5	
23.25.39.13.11.91.11	Ultrasound Pachymeters	6	
23.25.39.13.11.91.13	Corneal Ultrasound Pachymeters	6	
23.25.39.13.11.93	Phoropter Units	5	
23.25.39.13.11.95	Pseudoisochromatic Plate Sets	5	
23.25.39.13.11.97	Tachistoscopes	5	
23.25.39.13.11.99	Tangent Screens	5	
23.25.39.13.11.101	Viewing Stands For Vision Acuity Testing	5	
23.25.39.13.11.103	Vision Testing Stereoscopes	5	
23.25.39.13.13	Ophthalmic Equipment	4	
23.25.39.13.13.11	Lens Edging Machines	5	
23.25.39.13.13.11.11	Lens Edging Automatic Beveling Machines	6	
23.25.39.13.13.11.13	Lens Edging Automatic Machines	6	
23.25.39.13.13.13	Ophthalmic Lasers	5	
23.25.39.13.13.13.11	Dual Fiber Photocoagulation Ophthalmic Lasers	6	
23.25.39.13.13.13.13	Ophthalmic Laser With Ophthalmoscopes	6	
23.25.39.13.13.13.15	Ophthalmic Laser With Slit Lamps	6	
23.25.39.13.13.13.17	Semiconductor Diode Ophthalmic Lasers	6	
23.25.39.13.13.15	Phacofragmentation (Cusa) Units	5	
23.25.39.13.15	Obstetrical And Gynecological Kits	4	
23.25.39.13.15.11	Amniocentesis Kits	5	
23.25.39.13.15.13	Obstetrical Extraction Units	5	
23.25.39.13.15.15	Gynecology Drainage Kits	5	
23.25.39.15	Ophthalmology Prefabricated Structures	3	
23.25.41.00	Orthopedics Products	2	
23.25.41.11	Orthopedics Furnishings	3	
23.25.41.11.11	Orthopedics Tables	4	
23.25.41.11.11.11	Medical Casting Tables	5	
23.25.41.11.11.13	Orthopedic Operating Tables	5	
23.25.41.11.11.15	Orthopedic Fracture Operating Tables	5	
23.25.41.11.13	Orthopedics Sinks	4	
23.25.41.11.13.11	Plaster Sinks	5	
23.25.41.13	Orthopedics Equipment	3	
23.25.41.13.11	Orthopedics Carts	4	
23.25.41.13.11.11	Plaster Carts	5	
23.25.41.15	Orthopedic And Prosthetic And Sports Medicine Products	3	
23.25.41.15.11	Casting Equipment And Products	4	
23.25.41.15.11.11	Broken Arm Casting Machines	5	
23.25.41.15.11.13	Cast Carts	5	
23.25.41.15.11.15	Cast Cutters	5	
23.25.41.15.11.17	Cast Impression Trays	5	
23.25.41.15.11.19	Cast Saws	5	
23.25.41.15.11.21	Cast Stands	5	
23.25.41.15.11.23	Cast Vacuum Units	5	
23.25.41.15.11.25	Casting Induction Machines	5	
23.25.41.15.11.27	Casting Machine Guards	5	
23.25.41.15.11.29	Chrome Cobalt Casting Machines	5	
23.25.41.15.13	Orthopedic Traction Products	4	
23.25.41.15.13.11	Mobile Traction Carts	5	
23.25.41.15.13.13	Orthopedic Traction Weights	5	
23.25.41.15.13.15	Orthopedic Upper Limb Appliances	5	
23.25.41.17	Orthopedics Prefabricated Structures	3	
23.25.43.00	Otolaryngology Products	2	
23.25.43.11	Otolaryngology Furnishings	3	
23.25.43.13	Otolaryngology Equipment	3	
23.25.43.13.11	Nasal Equipment	4	
23.25.43.13.11.11	Nasal Bleeding Control Devices	5	
23.25.43.13.11.13	Nasal Flowmeters	5	
23.25.43.13.11.15	Nasal Irrigation Devices	5	
23.25.43.13.11.17	Olfactometers	5	
23.25.43.13.11.19	Rhinoanemometers	5	
23.25.43.13.13	Taste Equipment	4	
23.25.43.13.13.11	Gustometers	5	
23.25.43.13.15	Ear Equipment	4	
23.25.43.13.15.11	Earmold Equipment	5	
23.25.43.15	Otolaryngology Prefabricated Structures	3	
23.25.45.00	Patient Care Products	2	
23.25.45.11	Patient Care Furnishings	3	
23.25.45.11.11	Patient Beds	4	
23.25.45.11.11.11	Electric Patient Beds	5	
23.25.45.11.11.13	Electric Special Care Patient Beds	5	
23.25.45.11.11.15	Hospital Bedside Rails	5	
23.25.45.11.11.17	Hospital Head Boards	5	
23.25.45.11.13	Medical Mattresses	4	
23.25.45.11.13.11	Hospital Bed Mattresses	5	
23.25.45.11.13.13	Medical Pressure Reduction Mattresses	5	
23.25.45.11.15	Patient Baths	4	
23.25.45.11.17	Patient Showers	4	
23.25.45.11.17.11	Free Standing Patient Showers	5	
23.25.45.11.17.13	Patient?s Combination Toilets	5	
23.25.45.11.19	Patient Seating	4	
23.25.45.11.19.11	Hospital Recliners	5	
23.25.45.11.19.13	Patient Chairs	5	
23.25.45.11.21	Physically Challenged Transport Equipment	4	
23.25.45.11.21.11	Physically Challenged Multifunctional Mobility Devices	5	
23.25.45.11.21.13	Physically Challenged Positioning Devices	5	
23.25.45.11.21.15	Physically Challenged Standing Aids	5	
23.25.45.11.21.17	Physically Challenged Whole Body Sliding Devices	5	
23.25.45.11.21.19	Physically Challenged Whole Body Turning Devices	5	
23.25.45.11.21.21	Rollators	5	
23.25.45.11.21.23	Walkers	5	
23.25.45.11.23	Physically Challenged Baths and Showers	4	
23.25.45.11.23.11	Physically Challenged Bath Chairs	5	
23.25.45.11.23.13	Physically Challenged Bath Lifts	5	
23.25.45.11.23.15	Physically Challenged Bath Safety Rails	5	
23.25.45.11.23.17	Physically Challenged Bathboards	5	
23.25.45.11.23.19	Physically Challenged Shower Seats	5	
23.25.45.11.23.21	Physically Challenged Showers	5	
23.25.45.11.23.23	Physically Challenged Sitz Baths	5	
23.25.45.11.25	Physically Challenged Baths and Showers	4	
23.25.45.11.25.11	Physically Challenged Toilet Arm Supports	5	
23.25.45.11.25.13	Physically Challenged Toilet Frames	5	
23.25.45.11.25.15	Physically Challenged Toilet Grab Bars	5	
23.25.45.11.25.17	Physically Challenged Toilet Seat Lifters	5	
23.25.45.11.25.19	Physically Challenged Toilet Seats	5	
23.25.45.11.25.21	Physically Challenged Toilets	5	
23.25.45.13	Patient Care Equipment	3	
23.25.45.15	Patient Care Prefabricated Structures	3	
23.25.47.00	Patient Clinical Diagnostic Products	2	
23.25.47.11	Patient Clinical Diagnostic Furnishings	3	
23.25.47.11.11	Privacy Screens	4	
23.25.47.11.11.11	Patient Cubicle Curtain Tracks	5	
23.25.47.11.11.13	Patient Cubicle Curtains	5	
23.25.47.11.11.15	Patient Cubicle Screens	5	
23.25.47.11.13	Patient Clinical Diagnostic Tables	4	
23.25.47.11.13.11	Examination Treatment Tables	5	
23.25.47.11.13.13	Medical Procedure Tables	5	
23.25.47.11.13.15	Minor Surgical Tables	5	
23.25.47.11.13.17	Treatment Tables	5	
23.25.47.11.15	Patient Clinical Diagnostic Sinks	4	
23.25.47.11.15.11	Clinic Sinks	5	
23.25.47.11.15.13	Clinic Scrub Sinks	5	
23.25.47.11.17	Patient Clinical Diagnostic Storage Products	4	
23.25.47.11.17.11	Patient Records Shelving Units	5	
23.25.47.11.19	Patient Clinical Diagnostic Seating	4	
23.25.47.11.19.11	Clinical Examination Chairs	5	
23.25.47.11.19.13	Physician Stools	5	
23.25.47.11.21	Patient Clinical Diagnostic Cabinets	4	
23.25.47.11.21.11	Exam Room Cabinets	5	
23.25.47.11.21.13	Pass Through Specimen Cabinets	5	
23.25.47.11.21.15	Treatment Cabinets	5	
23.25.47.11.23	Patient Clinical Diagnostic Monitor Arms	4	
23.25.47.11.23.11	Medical Facility Monitor Ceiling Arms	5	
23.25.47.11.23.13	Medical Facility Monitor Wall Arms	5	
23.25.47.13	Patient Clinical Diagnostic Equipment	3	
23.25.47.13.11	Blood Pressure Units And Related Products	4	
23.25.47.13.11.11	Aneroid Blood Pressure Units	5	
23.25.47.13.11.13	Aneroid Sphygmomanometers	5	
23.25.47.13.11.15	Blood Pressure Recording Units	5	
23.25.47.13.11.17	Electronic Blood Pressure Units	5	
23.25.47.13.11.19	Mercury Blood Pressure Units	5	
23.25.47.13.11.21	Sphygmomanometers	5	
23.25.47.13.13	Electrocardiography EKG Units And Related Products	4	
23.25.47.13.13.11	Electrocardiography Units	5	
23.25.47.13.13.11.11	Multiple Channel Electrocardiograph Units	6	
23.25.47.13.13.11.13	Single Channel Electrocardiograph Units	6	
23.25.47.13.13.13	Electrocardiography Cable Lead Testers	5	
23.25.47.13.13.15	Electrocardiography Graphic Recorders	5	
23.25.47.13.13.17	Electrocardiography Monitors	5	
23.25.47.13.13.19	Electrocardiography Unit Analyzers	5	
23.25.47.13.13.21	Long Term Continuous Electrocardiography Monitoring Units	5	
23.25.47.13.13.23	Electrocardiography Transmitters	5	
23.25.47.13.15	Pulse Dosimeters Products	4	
23.25.47.13.15.11	Co Oximeters	5	
23.25.47.13.15.13	Pulse Oximeter Cables	5	
23.25.47.13.15.15	Pulse Oximeter Probes	5	
23.25.47.13.15.17	Pulse Oximeter Sensors	5	
23.25.47.13.15.19	Pulse Oximeter Units	5	
23.25.47.13.17	Medical Exam Diagnostic Products	4	
23.25.47.13.17.11	Angioscopes	5	
23.25.47.13.17.13	Anoscopes	5	
23.25.47.13.17.15	Binocular Ophthalmoscopes	5	
23.25.47.13.17.15.11	Direct Binocular Ophthalmoscopes	6	
23.25.47.13.17.15.13	Indirect Binocular Ophthalmoscopes	6	
23.25.47.13.17.17	Body Composition Analyzer	5	
23.25.47.13.17.19	Bronchoscopes	5	
23.25.47.13.17.21	Colposcopes	5	
23.25.47.13.17.23	Dermatoscopes	5	
23.25.47.13.17.25	Electroencephalograph EEG	5	
23.25.47.13.17.27	Electromyographs	5	
23.25.47.13.17.29	Electronic Stethoscopes	5	
23.25.47.13.17.31	Fiberoptic Bronchoscopes	5	
23.25.47.13.17.31.11	Adult Fiberoptic Bronchoscopes	6	
23.25.47.13.17.31.13	Adult Large Channel Fiberoptic Bronchoscopes	6	
23.25.47.13.17.31.15	Adult Slim Casing Fiberoptic Bronchoscopes	6	
23.25.47.13.17.31.17	Examination Fiberoptic Bronchoscopes	6	
23.25.47.13.17.31.19	Pediatric Fiberoptic Bronchoscopes	6	
23.25.47.13.17.31.21	Therapeutic Fiberoptic Bronchoscopes	6	
23.25.47.13.17.33	Goniometers	5	
23.25.47.13.17.35	Hand Held Vascular Dopplers	5	
23.25.47.13.17.37	Mechanical Stethoscopes	5	
23.25.47.13.17.39	Nasopharyngoscopes	5	
23.25.47.13.17.41	Neurological Discriminators	5	
23.25.47.13.17.43	Neurological Sensors	5	
23.25.47.13.17.45	Ophthalmoscopes	5	
23.25.47.13.17.47	Otoscopes	5	
23.25.47.13.17.49	Patient Thermoregulators	5	
23.25.47.13.17.51	Proctoscopes	5	
23.25.47.13.17.53	Stethoscopic Phonocardiographs	5	
23.25.47.13.17.55	Therapeutic Bronchoscopes	5	
23.25.47.13.17.57	Vaginoscopes	5	
23.25.47.13.19	Patient Weight Scales	4	
23.25.47.13.19.11	Diaper Weight Scales	5	
23.25.47.13.19.13	Infant Scales	5	
23.25.47.13.19.15	Patient Bed Scales	5	
23.25.47.13.19.17	Patient Chair Scales	5	
23.25.47.13.19.19	Patient Floor Scales	5	
23.25.47.13.19.21	Patient Sling Scales	5	
23.25.47.13.19.23	Patient Table Scales	5	
23.25.47.13.19.25	Wheelchair Platform Scales	5	
23.25.47.13.21	Patient Clinical Diagnostic Analyzers	4	
23.25.47.13.21.11	Amino Acid Analyzers	5	
23.25.47.13.21.13	Bilirubinometers	5	
23.25.47.13.21.15	Blood Bank Analyzers	5	
23.25.47.13.21.17	Blood Gas Analyzers	5	
23.25.47.13.21.19	Blood Chemistry Analyzers	5	
23.25.47.13.21.21	Chemistry Analyzers	5	
23.25.47.13.21.23	Coagulation Analyzers	5	
23.25.47.13.21.23.11	Automatic Coagulation Analyzers	6	
23.25.47.13.21.23.13	Fibrometers	6	
23.25.47.13.21.25	Deoxyribonucleic Sequence Analyzers	5	
23.25.47.13.21.27	Toxicology Analyzers	5	
23.25.47.13.21.29	Hematology Analyzers	5	
23.25.47.13.21.29.11	Differential Hematology Analyzers	6	
23.25.47.13.21.31	Histology Analyzers	5	
23.25.47.13.21.33	Breath Hydrogen Analyzers	5	
23.25.47.13.21.35	Immunology Analyzers	5	
23.25.47.13.21.37	Microbiology Analyzers	5	
23.25.47.13.21.39	Protein Analyzers	5	
23.25.47.13.21.41	Radioisotopic Analyzers	5	
23.25.47.13.21.43	Urinalysis Analyzers	5	
23.25.47.13.21.43.11	Advanced Urinalysis Analyzers	6	
23.25.47.13.21.43.13	Basic Urinalysis Analyzers	6	
23.25.47.13.21.45	Glucose Analyzers	5	
23.25.47.13.21.47	Drug Screening Chemistry Analyzers	5	
23.25.47.13.21.49	High Capacity Strat Chemistry Analyzers	5	
23.25.47.13.21.51	Multichannel Chemistry Analyzer	5	
23.25.47.13.21.53	Stat Chemistry Analyzers	5	
23.25.47.13.21.55	Enzyme Immuni Assay Analysis Units	5	
23.25.47.13.21.55.11	Advanced Enzyme Immuni Assay Analysis Units	6	
23.25.47.13.21.55.13	Basic Enzyme Immuni Assay Analysis Units	6	
23.25.47.13.21.55.15	Plate Washer Enzyme Immuni Assay Analysis Units	6	
23.25.47.13.21.55.17	Hemoglobinometers	6	
23.25.47.13.23	Patient Clinical Testing Products	4	
23.25.47.13.23.11	Cholesterol Meters	5	
23.25.47.13.23.13	Cholesterol Monitors	5	
23.25.47.13.23.15	Glucose Meters	5	
23.25.47.13.23.17	Glucose Monitors	5	
23.25.47.15	Patient Clinical Diagnostic Prefabricated Structures	3	
23.25.47.15.11	Exam Work Centers	4	
23.25.47.15.13	Gross Pathology Stations	4	
23.25.47.15.15	Hospital equipment power columns	4	
23.25.47.15.17	Medical Preparation Work Centers	4	
23.25.49.00	Patient Transportation and Lifting Equipment	2	
23.25.49.11	Patient transport products	3	
23.25.49.11.11	Patient Transport Trolleys	4	
23.25.49.11.13	Patient Gurneys	4	
23.25.49.11.15	Geriatric Chairs	4	
23.25.49.11.17	Patient Transport Incubators	4	
23.25.49.11.19	Patient Scooters	4	
23.25.49.11.21	Patient Stretchers	4	
23.25.49.11.21.11	Cadaver Transport Stretchers	5	
23.25.49.11.21.13	Labor Recover Stretchers	5	
23.25.49.11.21.15	MRI Compatible Stretchers	5	
23.25.49.11.21.17	Surgical Recovery Stretchers	5	
23.25.49.11.23	Patient Mobile Stretchers	4	
23.25.49.11.23.11	Tapered Head Mobile Stretchers	5	
23.25.49.11.23.13	9 Position Mobile Stretchers	5	
23.25.49.11.25	Wheelchairs	4	
23.25.49.11.25.11	Electric Wheelchairs	5	
23.25.49.11.25.13	Manual Wheelchairs	5	
23.25.49.11.27	Patient Shifting Boards	4	
23.25.49.11.29	Patient Transfer Mats	4	
23.25.49.13	Patient lifts	3	
23.25.49.13.11	Patient Scissor Lifts	4	
23.25.49.13.13	Clinical Hydraulic Lifts	4	
23.25.49.13.15	Patient Suspended Seats	4	
23.25.49.13.17	Patient Suspended Slings	4	
23.25.49.13.19	Patient Ceiling Hoists	4	
23.25.49.13.21	Clinical Infant Slings	4	
23.25.49.13.21.11	Patient Hoists	5	
23.25.51.00	Pediatrics Products	2	
23.25.51.11	Pediatrics Furnishings	3	
23.25.51.11.11	Pediatric Beds	4	
23.25.51.11.11.11	Pediatric Bassinets	5	
23.25.51.11.11.13	Pediatric Beds	5	
23.25.51.11.11.15	Pediatric Cribs	5	
23.25.51.11.11.17	Pediatric Examination Tables	5	
23.25.51.11.11.19	Pediatric Incubators	5	
23.25.51.11.11.21	Pediatric Infant Positioning Cradles	5	
23.25.51.11.11.23	Pediatric Infant Warmers	5	
23.25.51.13	Pediatrics Equipment	3	
23.25.51.13.11	Pediatrics Ventilators	4	
23.25.51.13.11.11	Pediatric Intensive Care Ventilators	5	
23.25.51.13.11.13	Infant Intensive Care Ventilators	5	
23.25.51.15	Pediatrics Prefabricated Structures	3	
23.25.51.15.11	Infant Prefabricated Service Columns	4	
23.25.53.00	Pharmacology Products	2	
23.25.53.11	Pharmacology Furnishings	3	
23.25.53.11.11	Pharmacy Shelving Units	4	
23.25.53.11.13	Pharmacology Cabinets	4	
23.25.53.11.13.11	Medicine Cabinets	5	
23.25.53.11.13.13	Narcotic Cabinets	5	
23.25.53.11.13.13.11	Narcotic Cabinets With Safe	6	
23.25.53.13	Pharmacology Equipment	3	
23.25.53.13.11	Pharmacology Carts	4	
23.25.53.13.11.11	Medication Carts	5	
23.25.53.13.11.13	Unit Dose Medication Carts	5	
23.25.53.13.13	Tablet Products	4	
23.25.53.13.13.11	Tablet Crushers	5	
23.25.53.13.13.13	Tablet Crusher Dispensers	5	
23.25.53.13.13.15	Tablet Cutters	5	
23.25.53.15	Pharmacology Prefabricated Structures	3	
23.25.53.15.11	Pharmacy Stations	4	
23.25.55.00	Psychiatric and Psychology Products	2	
23.25.55.11	Psychiatric and Psychology Furnishings	3	
23.25.55.11.11	Psychiatric Beds	4	
23.25.55.11.11.11	Psychiatric Patient Showers	5	
23.25.55.11.11.13	Psychiatric Platform Bed Without Visible Legs	5	
23.25.55.11.11.15	Psychiatric Platform Beds	5	
23.25.55.11.11.17	Psychiatric Platform Beds	5	
23.25.55.13	Psychiatric and Psychology Equipment	3	
23.25.55.15	Psychiatric and Psychology Prefabricated Structures	3	
23.25.57.00	Sterilization Medical Products	2	
23.25.57.11	Sterilizer Equipment	3	
23.25.57.11.11	Chemical Sterilizers	4	
23.25.57.11.13	Dry Heat Sterilizers	4	
23.25.57.11.15	Filter Sterilizers	4	
23.25.57.11.17	Gas Sterilizers	4	
23.25.57.11.19	Glass Bead Sterilizers	4	
23.25.57.11.21	Hot Air Sterilizers	4	
23.25.57.11.23	Needle Sterilizers	4	
23.25.57.11.25	Powered Instrument Cleaning Devices	4	
23.25.57.11.27	Radiation Sterilizers	4	
23.25.57.11.29	Sanitizer Heaters	4	
23.25.57.11.31	Steam Autoclaves	4	
23.25.57.11.33	Steam Sterilizers	4	
23.25.57.11.35	Sterilization Cabinets	4	
23.25.57.11.37	Sterilization Lamps	4	
23.25.57.11.39	Sterilization Water Recovery Equipment	4	
23.25.57.11.41	Double Chamber Ultrasonic Cleaners	4	
23.25.57.11.43	Single Chamber Ultrasonic Cleaners	4	
23.25.59.00	Surgical Products	2	
23.25.59.11	Surgical Furnishings	3	
23.25.59.11.11	Surgical Beds	4	
23.25.59.11.11.11	Surgical Bedside Rails	5	
23.25.59.11.13	Surgical Sinks	4	
23.25.59.11.13.11	Surgeon Scrub Sinks	5	
23.25.59.11.13.13	Surgeon?s Instrument Sinks	5	
23.25.59.11.15	Surgical Tables	4	
23.25.59.11.15.11	Surgical Instrument Tables	5	
23.25.59.11.15.13	Spinal Operating Tables	5	
23.25.59.11.15.15	Surgical Operating Tables	5	
23.25.59.11.15.17	Straddle Instrument Tables	5	
23.25.59.11.15.19	Medical Dressing Instrument Tables	5	
23.25.59.11.15.21	Cesarean Section Patient Procedure Tables	5	
23.25.59.11.15.23	Delivery Room Patient Procedure Tables	5	
23.25.59.11.15.25	Surgical Instrument Tables	5	
23.25.59.11.15.27	Operating Room Patient Fracture Tables	5	
23.25.59.11.15.29	Operating Room Patient Procedure Tables 	5	
23.25.59.11.15.31	Surgical Equipment Stands	5	
23.25.59.11.17	Surgical Seating	4	
23.25.59.11.17.11	Surgeon Stools	5	
23.25.59.11.17.13	Rolling Surgeons Stools	5	
23.25.59.11.17.15	Surgical Step Stools	5	
23.25.59.11.19	Surgical Cabinets	4	
23.25.59.11.19.11	Surgical Instrument Cabinets	5	
23.25.59.13	Surgical Equipment	3	
23.25.59.13.11	Surgical Carts	4	
23.25.59.13.11.11	Sterilizable Loading Carts	5	
23.25.59.13.11.13	Surgical Case Carts	5	
23.25.59.13.11.15	Surgical Dressing Carts	5	
23.25.59.13.11.17	Operating Room Case Carts 	5	
23.25.59.13.13	Cardiovascular Products	4	
23.25.59.13.13.11	Heart And Lung Machines	5	
23.25.59.13.13.13	Intraaortic Balloon Pumps	5	
23.25.59.13.13.15	Intracardiac Suction Devices	5	
23.25.59.13.13.17	Perfusion Blood Parameter Monitors	5	
23.25.59.13.13.19	Perfusion Bubble Traps	5	
23.25.59.13.13.21	Perfusion Cardioplegia Sets	5	
23.25.59.13.13.23	Perfusion Cardiotomy Reservoirs	5	
23.25.59.13.13.25	Perfusion Centrifugal Equipment	5	
23.25.59.13.13.27	Perfusion Heaters	5	
23.25.59.13.13.29	Perfusion Coolers	5	
23.25.59.13.13.31	Perfusion Dual Heater And Cooler Units	5	
23.25.59.13.13.33	Perfusion Haemoconcentrators	5	
23.25.59.13.13.35	Perfusion Oxygen Saturation Monitors	5	
23.25.59.13.13.37	Perfusion Oxygenators	5	
23.25.59.13.13.39	Perfusion Pump Heads	5	
23.25.59.13.13.41	Perfusion Venous Reservoirs	5	
23.25.59.13.13.43	Ventricular Assist Devices	5	
23.25.59.13.13.45	Perfusion Pumps	5	
23.25.59.13.13.47	Cardiovascular Reservoirs	5	
23.25.59.13.13.49	Surgical Coronary Artery Blowers	5	
23.25.59.13.13.51	Surgical Coronary Artery Misters	5	
23.25.59.13.15	Surgical Equipment	4	
23.25.59.13.15.11	Surgical Basin Stands	5	
23.25.59.13.15.13	Cryosurgery Equipment	5	
23.25.59.13.15.15	Electrocautery Equipment	5	
23.25.59.13.15.17	Ophthalmic Irrigation Equipment	5	
23.25.59.13.15.19	Ophthalmic Surgery Phacoemulsification Equipment	5	
23.25.59.13.15.21	Ophthalmic Surgery Extrusion Equipment	5	
23.25.59.13.15.23	Surgical Irrigation Pumps	5	
23.25.59.13.15.25	Pulsed Lavage Units With Suction	5	
23.25.59.13.15.27	Pulsed Lavage Units With Out Suction	5	
23.25.59.13.15.29	Surgical Lasers	5	
23.25.59.13.15.29.11	CO2 Surgical Lasers	6	
23.25.59.13.15.29.13	KTP Surgical Lasers	6	
23.25.59.13.15.31	Surgical Lithotripters	5	
23.25.59.13.15.31.11	Extracorporeal Lithotripters	6	
23.25.59.13.15.31.13	Ultrasound Lithotripters	6	
23.25.59.13.15.33	Surgical Microscopes	5	
23.25.59.13.15.35	Surgical Magnifiers	5	
23.25.59.13.15.37	Surgical Pneumatic Tourniquets	5	
23.25.59.13.15.39	Surgical Electric Tourniquets	5	
23.25.59.13.15.41	Surgical Aspirators	5	
23.25.59.13.15.41.11	General Purpose Aspirator Pressure Units	6	
23.25.59.13.15.41.13	Low Pressure High Volume Suction Chest and Abdomen Aspirators	6	
23.25.59.13.15.41.15	Low Pressure Low Volume Suction Surgical Aspirators	6	
23.25.59.13.15.41.17	Mobile Uterine Aspirators	6	
23.25.59.13.15.43	Surgical Urological Tables	5	
23.25.59.13.15.45	Vitreo Retinal Fragmatome Surgery Equipment	5	
23.25.59.13.15.47	Microsurgery Equipment	5	
23.25.59.13.15.49	Operating Room Medication Dispensers	5	
23.25.59.13.15.51	Surgical Dermatomes	5	
23.25.59.13.15.53	Surgical Dermabraders	5	
23.25.59.13.15.55	Surgical Dermameshers	5	
23.25.59.13.15.57	Surgical Pneumatic Saws	5	
23.25.59.13.15.59	Surgical Pneumatic Drills	5	
23.25.59.13.15.61	Surgical Power Pin Drivers	5	
23.25.59.13.15.63	Surgical Power Saws	5	
23.25.59.13.15.65	Surgical Power Drills	5	
23.25.59.13.15.67	Surgical Power Pin Drivers	5	
23.25.59.13.15.69	Surgical Reamers	5	
23.25.59.13.15.71	Surgical Shavers	5	
23.25.59.13.15.73	Electrosurgical Units	5	
23.25.59.13.15.73.11	Dual Output Electrosurgical Units	6	
23.25.59.13.15.73.13	Endoscopy Electrosurgical Units	6	
23.25.59.13.15.73.15	Monopolar Electrosurgical Units	6	
23.25.59.13.15.73.17	Unblended Mobile Electrosurgical Units	6	
23.25.59.13.17	Surgical Lighting Fixtures	4	
23.25.59.13.17.11	Surgical Operating Room Lighting Fixtures	5	
23.25.59.13.19	Surgical Support Products	4	
23.25.59.13.19.11	Surgical Basin Sets	5	
23.25.59.13.19.13	Surgical Bone Cement Mixing Equipment	5	
23.25.59.13.19.15	Surgical Suction Canisters	5	
23.25.59.13.19.17	Surgical Glove Drying Or Powdering Equipment	5	
23.25.59.13.19.19	Surgical Fluid Decanting Devices	5	
23.25.59.15	Surgical Prefabricated Structures	3	
23.25.59.15.11	Surgical Prefabricated Service Columns	4	
23.25.61.00	Veterinary and Animal Products	2	
23.25.61.11	Veterinary and Animal Furnishings	3	
23.25.61.11.11	Veterinary Tables	4	
23.25.61.11.11.11	Veterinary Operating Tables	5	
23.25.61.11.11.13	Postmortem Animal Dissection Tables	5	
23.25.61.11.11.15	Necropsy Tables	5	
23.25.61.11.11.17	Veterinary Surgical Tables	5	
23.25.61.11.13	Veterinary Sinks	4	
23.25.61.11.13.11	Animal Cage Washing Sinks	5	
23.25.61.11.15	Veterinary Storage Chests	4	
23.25.61.13	Veterinary and Animal Equipment	3	
23.25.61.13.11	Animal Containment Products	4	
23.25.61.13.11.10	Cage Washers	5	
23.25.61.13.11.11	Small Animal Laboratory Cages	5	
23.25.61.13.11.13	Large Animal Laboratory Cages	5	
23.25.61.13.11.15	Large Animal Mobile Kennels	5	
23.25.61.13.11.15.11	Intensive Care Large Animal Mobile Kennels	6	
23.25.61.13.11.17	Small Animal Mobile Kennels	5	
23.25.61.13.11.17.11	Intensive Care Small Animal Mobile Kennels	6	
23.25.61.13.11.19	Aquaria Equipment	5	
23.25.61.13.11.21	Animal Catching Devices	5	
23.25.61.13.11.23	Fish Aeration Systems	5	
23.25.61.15	Veterinary Equipment	3	
23.25.61.15.11	Veterinary Blood Pressure Testers	4	
23.25.61.15.13	Veterinary Kymograph Testers	4	
23.25.61.15.15	Veterinary Pyrogenic Testers	4	
23.25.61.15.17	Veterinary Stereotoxic Equipment	4	
23.25.61.15.19	Veterinary Electrocardiographs ECG	4	
23.25.61.17	Veterinary and Animal Prefabricated Structures	3	
23.25.63.00	X Ray and Imagery Products	2	
23.25.63.11	X Ray and Imagery Furnishings	3	
23.25.63.11.11	X Ray and Imagery Sinks	4	
23.25.63.11.11.11	Film Processing Sinks	5	
23.25.63.11.11.13	Lead Lined Sinks	5	
23.25.63.11.11.13.11	Lead Lined With Decay Storage Sinks	6	
23.25.63.11.13	X Ray and Imagery Protective Barriers	4	
23.25.63.11.13.11	X Ray Protective Screens	5	
23.25.63.11.13.13	Radiofrequency Proective Screens	5	
23.25.63.11.13.15	Radiological Shielding Apron Racks	5	
23.25.63.11.13.17	Portable Radioactive Materials Containers	5	
23.25.63.11.13.19	Radiological Shielding Freestanding Screens	5	
23.25.63.11.13.21	Radiological Shielding Wall	5	
23.25.63.11.13.23	Radiological Shielding Ceiling Panels	5	
23.25.63.11.13.25	Radiological Shielding Floor Installed Panels	5	
23.25.63.11.15	X Ray and Imagery Storage Units	4	
23.25.63.11.15.11	Lead Lined Storage Cabinets	5	
23.25.63.11.15.13	Photographic Slides Storage Cabinets	5	
23.25.63.13	X Ray and Imagery Equipment	3	
23.25.63.13.11	X Ray and Imagery Carts	4	
23.25.63.13.11.11	Radium Transport Carts	5	
23.25.63.13.13	Computed Tomography CT and CAT Products	4	
23.25.63.13.13.11	Computed Tomography CT Complete Stationary Units	5	
23.25.63.13.13.13	Computed Tomography CT Mobile Units	5	
23.25.63.13.13.15	Computed Tomography CT Van Units	5	
23.25.63.13.13.17	Computed Tomography CT Consoles	5	
23.25.63.13.13.19	Computed Tomography CT Power Conditioners	5	
23.25.63.13.13.21	Computed Tomography CT Tables	5	
23.25.63.13.13.23	Computed Tomography CT Chairs	5	
23.25.63.13.13.25	Computed Tomography CAT Complete Stationary Units	5	
23.25.63.13.13.27	Computed Tomography CAT Mobile Units	5	
23.25.63.13.13.29	Computed Tomography CAT Transportable Units	5	
23.25.63.13.13.31	Computed Tomography CAT Van Units	5	
23.25.63.13.13.33	Computed Tomography CAT Consoles	5	
23.25.63.13.13.35	Computed Tomography CAT Power Conditioners	5	
23.25.63.13.13.37	Computed Tomography CAT Tables	5	
23.25.63.13.13.39	Computed Tomography CAT Chairs	5	
23.25.63.13.13.41	Computerized Tomography Phantoms	5	
23.25.63.13.13.41.11	Body Computerized Tomography Phantoms	6	
23.25.63.13.13.41.13	Head Computerized Tomography Phantoms	6	
23.25.63.13.13.41.15	Performance Computerized Tomography Phantoms	6	
23.25.63.13.13.43	Computed Tomography CT Radiotherapy Simulators	5	
23.25.63.13.13.45	Computed Tomography CAT Radiotherapy Simulators	5	
23.25.63.13.15	Magnetic Resonance Imaging Products	4	
23.25.63.13.15.11	Medical Magnetic Resonance Imaging Complete Stationary Unit Installation	5	
23.25.63.13.15.13	Medical Magnetic Resonance Imaging Mobile Units	5	
23.25.63.13.15.15	Medical Magnetic Resonance Imaging Transportable Units	5	
23.25.63.13.15.17	Medical Magnetic Resonance Imaging Van Units	5	
23.25.63.13.15.19	Medical Magnetic Resonance Imaging Monitors	5	
23.25.63.13.15.21	Medical Magnetic Resonance Imaging Scanners	5	
23.25.63.13.15.23	Medical Magnetic Resonance Imaging Tables	5	
23.25.63.13.17	Ultrasound Doppler And Echo Imaging Products	4	
23.25.63.13.17.11	Cardiac Ultrasound Units	5	
23.25.63.13.17.13	Cardiac Doppler Units	5	
23.25.63.13.17.15	Cardiac Echo Units	5	
23.25.63.13.17.17	Cardioscopes	5	
23.25.63.13.17.19	Fetal Ultrasound Units	5	
23.25.63.13.17.21	Fetal Echo Units	5	
23.25.63.13.17.23	Gynecological Ultrasound Units	5	
23.25.63.13.17.25	Gynecological Echo Units	5	
23.25.63.13.17.27	Mammographic Ultrasound Units	5	
23.25.63.13.17.29	Mammographic Echo Units	5	
23.25.63.13.17.31	Medical Ultrasound Bone Densitometers	5	
23.25.63.13.17.33	Medical Ultrasound Or Doppler Or Echo Monitors	5	
23.25.63.13.17.35	Medical Ultrasound Or Doppler Or Echo Printers	5	
23.25.63.13.17.37	Medical Ultrasound Transducers	5	
23.25.63.13.17.39	Medical Doppler Transducers	5	
23.25.63.13.17.41	Medical  Echo Transducers	5	
23.25.63.13.17.43	Medical General Use Ultrasound Units	5	
23.25.63.13.17.45	Medical General Use Doppler Units	5	
23.25.63.13.17.47	Medical General Use Pulse Echo Units	5	
23.25.63.13.17.49	Medical General Use Echography Units	5	
23.25.63.13.17.51	Thesiometers	5	
23.25.63.13.17.53	Vaginal Ultrasound Or Echo Probes	5	
23.25.63.13.17.55	Vascular Ultrasound Units	5	
23.25.63.13.17.57	Medical Ultrasound Ophthalmic Scanners	5	
23.25.63.13.19	X Ray Products	4	
23.25.63.13.19.11	Chest X Ray Equipment	5	
23.25.63.13.19.13	Mammography X Ray Equipment	5	
23.25.63.13.19.15	Medical C Arm X Ray Units	5	
23.25.63.13.19.17	Medical Cine Fluoroscopy Equipment	5	
23.25.63.13.19.19	Medical Radiology And Fluoroscopy RF Equipment	5	
23.25.63.13.19.21	Medical Radioisotope Scanners	5	
23.25.63.13.19.23	Medical X Ray Buckys	5	
23.25.63.13.19.25	Medical X Ray Quality Assurance Calibration Devices	5	
23.25.63.13.19.27	Medical X Ray Tables	5	
23.25.63.13.19.29	Medical X Ray Stands	5	
23.25.63.13.19.31	Medical X Ray Chairs	5	
23.25.63.13.19.33	Medical X Ray Cabinets	5	
23.25.63.13.19.35	Medical X Ray Tomography Units	5	
23.25.63.13.19.37	Medical Diagnostic Use X Ray Units	5	
23.25.63.13.19.39	Medical Xeroradiography Units	5	
23.25.63.13.19.41	X Ray Bone Densitometers	5	
23.25.63.13.19.43	Medical X Ray Intensifying Screens	5	
23.25.63.13.19.45	Medical X Ray Water Coolers	5	
23.25.63.13.19.47	Medical Imaging Procedure Trays	5	
23.25.63.13.19.49	Medical X Ray Film Hot Spot Lights	5	
23.25.63.13.19.51	Medical X Ray Film Large Rack Viewing Systems	5	
23.25.63.13.19.53	Medical X Ray Film View Boxes	5	
23.25.63.13.19.55	Medical X Ray Film Illuminator Windows	5	
23.25.63.13.19.57	Medical X Ray Film Illuminator Screens	5	
23.25.63.13.19.59	Medical X Ray Film Stereoscopes	5	
23.25.63.13.21	Gamma Cameras Products	4	
23.25.63.13.21.11	Medical General Use Gamma Cameras	5	
23.25.63.13.21.13	Lymphatic Mapping Navigator Equipment	5	
23.25.63.13.21.15	Lymphatic Mapping Probes	5	
23.25.63.13.21.17	Lymphatic Mapping Collimators	5	
23.25.63.13.23	Gamma Radiation Therapy Products	4	
23.25.63.13.23.11	Radiosurgical Gamma Knife Collimators	5	
23.25.63.13.23.13	Radiosurgical Gamma Knife Units	5	
23.25.63.13.23.15	Radiosurgical Gamma Scintillators	5	
23.25.63.13.25	Linear Accelerator Intensity Modulated Radiation Therapy Units	4	
23.25.63.13.25.11	Medical Linear Accelerator Intensity Modulated Radiation Therapy IMRT Two Dimensional Units	5	
23.25.63.13.25.13	Medical Linear Accelerator Intensity Modulated Radiation Therapy IMRT Three Dimensional Units	5	
23.25.63.13.25.15	Medical Linear Accelerator Intensity Modulated Radiation Therapy IMRT Collimators	5	
23.25.63.13.25.17	Dual Energy Linear Accelerator	5	
23.25.63.13.27	Medical Positron Emission Tomography Units	4	
23.25.63.13.27.11	Medical Positron Emission Tomography PET Units	5	
23.25.63.13.29	Medical Single Photon Emission Computed Tomography Units	4	
23.25.63.13.29.11	Medical Single Photon Emission Computed Tomography SPECT Units	5	
23.25.63.13.31	Radiotherapy Teletherapy Products	4	
23.25.63.13.31.11	Radiotherapy Teletherapy Cobalt 60 Equipment	5	
23.25.63.13.31.13	Radiotherapy Teletherapy Linear Accelerators	5	
23.25.63.13.31.15	Radiotherapy Teletherapy Orthovoltage X Ray Machines	5	
23.25.63.13.31.17	Radiotherapy Teletherapy Superficial X Ray Machines	5	
23.25.63.13.31.19	Radiotherapy Cutters	5	
23.25.63.13.31.19.11	Radiotherapy Beam Block Cutters	6	
23.25.63.13.31.19.13	Radiotherapy Compensator Cutters	6	
23.25.63.13.33	Radiographic Fluoroscopic Units	4	
23.25.63.13.33.11	Computerized Tomography Radiographic Fluoroscopic Units	5	
23.25.63.13.33.13	Digital Angio Biplane Radiographic Fluoroscopic Units	5	
23.25.63.13.33.15	Digital Cardiac Radiographic Fluoroscopic Units	5	
23.25.63.13.33.17	Digital Chest Radiographic Fluoroscopic Units	5	
23.25.63.13.33.19	Mammographic Radiographic Fluoroscopic Units	5	
23.25.63.13.33.21	Non Tilt Table Radiographic Units	5	
23.25.63.13.33.23	Table Radiographic Fluoroscopic Units	5	
23.25.63.13.33.23.11	Remote Table Radiographic Fluoroscopic Units	6	
23.25.63.13.33.25	Urologic Radiographic Fluoroscopic Units	5	
23.25.63.13.33.25.11	Computerized Tomography Urologic Radiographic Fluoroscopic Units	6	
23.25.63.13.35	Radiation Detection Or Monitoring Products	4	
23.25.63.13.35.11	Radiation Dosimeters	5	
23.25.63.13.35.13	Radiation Badges	5	
23.25.63.13.35.15	Radiation Detectors	5	
23.25.63.15	X Ray and Imagery Prefabricated Structures	3	
23.25.63.15.11	Radiological Shielding Chambers	4	
23.25.63.15.13	Radiological Shielding Rooms	4	
23.25.63.15.15	Radiological Shielding Safes	4	
23.25.63.17	Specialized Medical Computer Equipment	3	
23.25.63.17.11	Computer Assisted Cardiology Management System	4	
23.25.63.17.13	Nuclear Medicine Clinical Computers	4	
23.25.63.17.15	DIN PACS Computer System	4	
23.25.63.17.17	Holter Monitor Analysis Computer System	4	
23.25.63.17.19	Mean Cell Volume Computers	4	
23.25.63.17.21	Radiation Therapy Treatment Planning Computers	4	
23.25.65.00	Biological Protection and Preservation Products	2	
23.25.65.11	Biological Safety Cabinets	3	
23.25.65.11.11	Biological Safety Class I Cabinets	4	
23.25.65.11.13	Biological Safety Class II Cabinets	4	
23.25.65.11.15	Biological Safety Class III Cabinets	4	
23.25.65.11.17	Cryogenic Freezers	4	
23.25.65.11.19	Biological Freezers	4	
23.25.65.11.21	Biological Refrigerators	4	
23.25.65.13	Cabinet Bases	3	
23.25.65.13.11	Biological Safety Class I Cabinet Bases	4	
23.25.65.13.13	Biological Safety Class II Cabinet Bases	4	
23.25.65.13.15	Biological Safety Class III Cabinet Bases	4	
23.25.67.00	Hazardous Materials Products	2	
23.25.67.11	Hazardous Materials Cabinets	3	
23.25.67.11.11	Acid Storage Cabinets	4	
23.25.67.11.13	Flammable Storage Cabinets	4	
23.25.67.13	Hazardous Materials Refrigerators and Freezers	3	
23.25.67.13.11	Flammable Material Storage Refrigerators	4	
23.25.67.13.13	Flammable Material Storage Freezers	4	
23.25.67.13.15	Flammable Material Storage Refrigerator Freezers	4	
23.25.67.13.17	Explosion Proof Refrigerators	4	
23.25.67.13.19	Explosion Proof Refrigerator Freezers	4	
23.25.69.00	Laboratory and Scientific Products	2	
23.25.69.11	Laboratory Furnishings	3	
23.25.69.11.11	Laboratory Tables	4	
23.25.69.11.11.11	Microscope Tables	5	
23.25.69.11.13	Laboratory Seating	4	
23.25.69.11.15	Laboratory Fume hoods	4	
23.25.69.11.15.11	Bench Fume hoods	5	
23.25.69.11.15.11.11	Horizontal Laminar Flow Bench Fume hoods	6	
23.25.69.11.15.13	Floor Standing Fume hoods	5	
23.25.69.11.15.13.11	Horizontal Laminar Flow Free Standing Fume hoods	6	
23.25.69.11.15.13.13	Explosion Proof Floor Standing Fume hoods	6	
23.25.69.11.15.13.15	Perchloric Floor Standing Fume Hoods	6	
23.25.69.11.15.15	Histopathology Staining Fume Hoods	5	
23.25.69.11.15.17	Horizontal Laminar Flow Fume Hoods	5	
23.25.69.13	Laboratory And Scientific Equipment	3	
23.25.69.13.11	Microscopes	4	
23.25.69.13.11.11	Acoustic Microscopes	5	
23.25.69.13.11.13	Binocular Microscopes	5	
23.25.69.13.11.13.11	Phase Contrast Binocular Microscopes	6	
23.25.69.13.11.13.13	Binocular Light Compound Microscopes	6	
23.25.69.13.11.15	Bore scope Inspection Equipment	5	
23.25.69.13.11.17	Combination Electron And Light Microscopes	5	
23.25.69.13.11.19	Dark field Microscopes	5	
23.25.69.13.11.21	Digital Image Varityping Microscopes	5	
23.25.69.13.11.23	Dissecting Light Microscopes	5	
23.25.69.13.11.25	Electron Microscopes	5	
23.25.69.13.11.27	Fluorescence Microscopes	5	
23.25.69.13.11.29	Fluorescent Microscopes	5	
23.25.69.13.11.31	Inverted Microscopes	5	
23.25.69.13.11.33	Ion Microscopes	5	
23.25.69.13.11.35	Laser Scanning Microscopes	5	
23.25.69.13.11.37	Metallurgical Microscopes	5	
23.25.69.13.11.39	Monocular Microscopes	5	
23.25.69.13.11.41	Operating Microscopes	5	
23.25.69.13.11.43	Photographic Fluorescent Microscopes	5	
23.25.69.13.11.45	Photographic Microscopes	5	
23.25.69.13.11.47	Polarizing Microscopes	5	
23.25.69.13.11.49	Projection Microscopes	5	
23.25.69.13.11.51	Scanning Electron Microscopes	5	
23.25.69.13.11.53	Scanning Light Microscopes	5	
23.25.69.13.11.55	Scanning Probe Microscopes	5	
23.25.69.13.11.57	Spinning Disk Microscopes	5	
23.25.69.13.11.59	Stereo Microscopes	5	
23.25.69.13.11.61	Tissue Culture Inverted Microscopes	5	
23.25.69.13.11.63	Transmission Electron Microscopes	5	
23.25.69.13.11.65	Trinocular Microscopes	5	
23.25.69.13.11.67	Wide Field Microscopes	5	
23.25.69.13.13	Optical Equipment	4	
23.25.69.13.13.11	Telescopes	5	
23.25.69.13.13.13	Binoculars	5	
23.25.69.13.13.15	Videoscopes	5	
23.25.69.13.13.17	Fiberscopes	5	
23.25.69.13.15	Laboratory Disruption Equipment	4	
23.25.69.13.15.11	French Pressure Cells	5	
23.25.69.13.15.13	Homogenizers	5	
23.25.69.13.15.15	Laboratory Blenders	5	
23.25.69.13.15.17	Laboratory Crushers	5	
23.25.69.13.15.19	Laboratory Disintegrators	5	
23.25.69.13.15.21	Laboratory Emulsifiers	5	
23.25.69.13.15.23	Laboratory Mills	5	
23.25.69.13.15.25	Laboratory Presses	5	
23.25.69.13.15.27	Laboratory Pulverizers	5	
23.25.69.13.15.29	Laboratory Tissue Grinders	5	
23.25.69.13.15.31	Liquid Measuring Cans	5	
23.25.69.13.15.33	Mortars	5	
23.25.69.13.15.35	Pestles	5	
23.25.69.13.17	Laboratory Heating Drying Equipment	4	
23.25.69.13.17.11	Laboratory Dry Baths	5	
23.25.69.13.17.13	Bunsen Burner	5	
23.25.69.13.17.15	Laboratory Hotplates	5	
23.25.69.13.17.17	Laboratory Incinerators	5	
23.25.69.13.17.19	Laboratory Infrared Dryers	5	
23.25.69.13.17.21	Laboratory Spirit Burners	5	
23.25.69.13.17.23	Laboratory Temperature Cycling Chambers	5	
23.25.69.13.17.25	Laboratory Thermal Cyclers	5	
23.25.69.13.17.27	Laboratory Warming Cabinets	5	
23.25.69.13.17.29	Stirring Hotplates	5	
23.25.69.13.19	Histology Equipment	4	
23.25.69.13.19.11	Tissue Embedding Stations	5	
23.25.69.13.19.13	Embedding Molds	5	
23.25.69.13.19.15	Embedding Capsules	5	
23.25.69.13.19.17	Embedding Compounds	5	
23.25.69.13.19.19	Histological Staining Units	5	
23.25.69.13.19.21	Tissue Processors	5	
23.25.69.13.19.21.11	Automatic Tissue Processors	6	
23.25.69.13.19.21.13	Electron Microscopy Tissue Processors	6	
23.25.69.13.19.21.15	Vacuum Tissue Processors	6	
23.25.69.13.19.23	Tissue Culture Units	5	
23.25.69.13.19.25	Ultrasonic Tissue Disintegrators	5	
23.25.69.13.19.27	Microtomes	5	
23.25.69.13.19.27.11	Tilt Rotary Microtomes	6	
23.25.69.13.19.27.13	Refrigerated Tilt Rotary Microtomes	6	
23.25.69.13.19.29	Slide Warmers	5	
23.25.69.13.19.31	Slide Dryers	5	
23.25.69.13.19.33	Slide Stainers	5	
23.25.69.13.21	Laboratory Cooling Equipment	4	
23.25.69.13.21.11	Liquid Nitrogen Dewars	5	
23.25.69.13.21.13	Ultra Cold Upright Cabinets	5	
23.25.69.13.21.15	Ultra Cold Freezers	5	
23.25.69.13.21.17	Ultralow Upright Cabinets	5	
23.25.69.13.21.19	Ultralow Freezers	5	
23.25.69.13.21.21	Ultra Cold Chest Freezers	5	
23.25.69.13.21.23	Ultralow Chest Freezers	5	
23.25.69.13.21.25	Liquid Nitrogen Freezers	5	
23.25.69.13.21.27	Laboratory Cold Water Circulators	5	
23.25.69.13.21.29	Chromatography Refrigerators	5	
23.25.69.13.21.31	Laboratory Plate Freezers	5	
23.25.69.13.21.33	Laboratory Cold Traps	5	
23.25.69.13.23	Centrifuges	4	
23.25.69.13.23.11	Benchtop Centrifuges	5	
23.25.69.13.23.13	Centrifuge Buckets	5	
23.25.69.13.23.15	Centrifuge Rotors	5	
23.25.69.13.23.17	Cytology Centrifuges	5	
23.25.69.13.23.19	Floor Centrifuges	5	
23.25.69.13.23.21	Microcentrifuges	5	
23.25.69.13.23.23	Microhematocrit Centrifuges	5	
23.25.69.13.23.25	Refrigerated Benchtop Centrifuges	5	
23.25.69.13.23.27	Refrigerated Floor Centrifuges	5	
23.25.69.13.23.29	Refrigerated Microcentrifuges	5	
23.25.69.13.23.31	Serological Centrifuges	5	
23.25.69.13.23.31.11	Multiple Speed Serological Centrifuges	6	
23.25.69.13.23.33	Tabletop Centrifuges	5	
23.25.69.13.23.35	Ultracentrifuges	5	
23.25.69.13.23.37	Vacuum Centrifuges	5	
23.25.69.13.25	Incubators	4	
23.25.69.13.25.11	CO2 Incubators	5	
23.25.69.13.25.13	Cooled Biological Oxygen Demand BOD Incubators	5	
23.25.69.13.25.15	Dry Wall Dual Chamber Carbon Dioxide Incubators	5	
23.25.69.13.25.17	Dry Wall Dual Chamber Carbon Dioxide Incubators With Humidity Control	5	
23.25.69.13.25.19	Dry Wall Dual Chamber Three Gas Incubators	5	
23.25.69.13.25.21	Dry Wall Dual Chamber Three Gas Incubators With Humidity Control	5	
23.25.69.13.25.23	Dry Wall Single Chamber Carbon Dioxide Incubators	5	
23.25.69.13.25.25	Dry Wall Single Chamber Carbon Dioxide Incubators With Humidity Control	5	
23.25.69.13.25.27	Dry Wall Single Chamber Three Gas Incubators	5	
23.25.69.13.25.29	Dry Wall Single Chamber Three Gas Incubators With Humidity Control	5	
23.25.69.13.25.31	Forced Air General Purpose Incubators	5	
23.25.69.13.25.33	Gravity Convection General Purpose Incubators	5	
23.25.69.13.25.35	Mechanical Convection General Purpose Incubators	5	
23.25.69.13.25.37	Multipurpose Incubators	5	
23.25.69.13.25.39	Plate Incubators	5	
23.25.69.13.25.41	Refrigerated Incubators	5	
23.25.69.13.25.43	Shaking Incubators	5	
23.25.69.13.25.45	Water Jacketed Dual Chamber Carbon Dioxide Incubators	5	
23.25.69.13.25.47	Water Jacketed Dual Chamber Carbon Dioxide Incubators With Humidity Control	5	
23.25.69.13.25.49	Water Jacketed Dual Chamber Three Gas Incubators	5	
23.25.69.13.25.51	Water Jacketed Dual Chamber Three Gas Incubators With Humidity Control	5	
23.25.69.13.25.53	Water Jacketed Single Chamber Carbon Dioxide Incubators	5	
23.25.69.13.25.55	Water Jacketed Single Chamber Carbon Dioxide Incubators With Humidity Control	5	
23.25.69.13.25.57	Water Jacketed Single Chamber Three Gas Incubators	5	
23.25.69.13.25.59	Water Jacketed Single Chamber Three Gas Incubators With Humidity Control	5	
23.25.69.13.27	Laboratory Ovens	4	
23.25.69.13.27.11	Laboratory Ageing Ovens	5	
23.25.69.13.27.13	Laboratory Cleanroom Ovens	5	
23.25.69.13.27.15	Laboratory Drying Cabinets	5	
23.25.69.13.27.17	Laboratory Drying Ovens	5	
23.25.69.13.27.19	Laboratory Gravity Convection Ovens	5	
23.25.69.13.27.21	Laboratory Induction Dryers	5	
23.25.69.13.27.23	Laboratory Mechanical Convection Ovens	5	
23.25.69.13.27.25	Laboratory Vacuum Ovens	5	
23.25.69.13.29	Laboratory Distillers	4	
23.25.69.13.29.11	Laboratory Water Distillers	5	
23.27.00.00	General Facility Services Products	1	
23.27.11.00	General Instruments and Controls	2	
23.27.11.11	Temperature Measuring Instrument And Controls	3	
23.27.11.11.11	Temperature Alarm Modules	4	
23.27.11.11.13	Temperature Control Modules	4	
23.27.11.11.15	Temperature Controllers	4	
23.27.11.11.15.11	Digital Temperature Controllers	5	
23.27.11.11.15.13	Electric Temperature Controllers	5	
23.27.11.11.15.15	Pneumatic Hating Controllers	5	
23.27.11.11.15.17	Hydraulic Temperature Controllers	5	
23.27.11.11.17	Temperature Detectors	4	
23.27.11.11.17.11	Thermocouple Detectors	5	
23.27.11.11.17.13	RTD Detectors	5	
23.27.11.11.19	Temperature Indicators	4	
23.27.11.11.21	Temperature Recorders	4	
23.27.11.11.23	Temperature Sensors	4	
23.27.11.11.23.11	Thermocouple Probes	5	
23.27.11.13	Pressure Measuring Instrument And Controls	3	
23.27.11.13.11	Pressure Alarm Modules	4	
23.27.11.13.13	Pressure Control Modules	4	
23.27.11.13.15	Pressure Controllers	4	
23.27.11.13.15.11	Digital Pressure Controllers	5	
23.27.11.13.15.13	Electric Pressure Controllers	5	
23.27.11.13.15.15	Pneumatic Hating Controllers	5	
23.27.11.13.15.17	Hydraulic Pressure Controllers	5	
23.27.11.13.17	Pressure Detectors	4	
23.27.11.13.19	Pressure Indicators	4	
23.27.11.13.21	Pressure Recorders	4	
23.27.11.13.23	Pressure Sensors	4	
23.27.11.13.25	Differential Pressure Alarm Modules	4	
23.27.11.13.27	Differential Pressure Control Modules	4	
23.27.11.13.29	Differential Pressure Controllers	4	
23.27.11.13.29.11	Digital Differential Pressure Controllers	5	
23.27.11.13.29.13	Electric Differential Pressure Controllers	5	
23.27.11.13.29.15	Pneumatic Hating Controllers	5	
23.27.11.13.29.17	Hydraulic Differential Pressure Controllers	5	
23.27.11.13.31	Differential Pressure Detectors	4	
23.27.11.13.33	Differential Pressure Indicators	4	
23.27.11.13.35	Differential Pressure Recorders	4	
23.27.11.13.37	Differential Pressure Sensors	4	
23.27.11.15	Flow Measuring Instrument And Controls	3	
23.27.11.15.11	Flow Alarm Modules	4	
23.27.11.15.13	Flow Control Modules	4	
23.27.11.15.15	Flow Controllers	4	
23.27.11.15.15.11	Digital Flow Controllers	5	
23.27.11.15.15.13	Electric Flow Controllers	5	
23.27.11.15.15.15	Pneumatic Hating Controllers	5	
23.27.11.15.15.17	Hydraulic Flow Controllers	5	
23.27.11.15.17	Flow Detectors	4	
23.27.11.15.19	Flow Indicators	4	
23.27.11.15.21	Flow Recorders	4	
23.27.11.15.23	Flow Sensors	4	
23.27.11.17	Concentration Measuring Instrument And Controls	3	
23.27.11.17.11	Humidity Concentration Measuring Instruments	4	
23.27.11.17.13	Carbon Dioxide (CO?) Concentration Measuring Instruments	4	
23.27.11.17.15	Ozone Concentration Measuring Instruments	4	
23.27.11.17.17	Other Gas Concentration Measuring Instruments	4	
23.27.11.19	Heat Measuring Instrument And Controls	3	
23.27.11.19.11	Heat Detectors	4	
23.27.11.19.13	Heating Controllers	4	
23.27.11.19.13.11	Digital Heating Controllers	5	
23.27.11.19.13.13	Electric Heating Controllers	5	
23.27.11.19.13.15	Pneumatic Hating Controllers	5	
23.27.11.19.13.17	Hydraulic Heating Controllers	5	
23.27.11.19.15	Heating Programmers	4	
23.27.11.19.17	Heating Optimizers	4	
23.27.11.21	Level Measuring Instrument And Controls	3	
23.27.11.21.11	Level Alarm Modules	4	
23.27.11.21.13	Level Control Modules	4	
23.27.11.21.15	Level Controllers	4	
23.27.11.21.15.11	Digital Level Controllers	5	
23.27.11.21.15.13	Electric Level Controllers	5	
23.27.11.21.15.15	Pneumatic Hating Controllers	5	
23.27.11.21.15.17	Hydraulic Level Controllers	5	
23.27.11.21.17	Level Detectors	4	
23.27.11.21.19	Level Indicators	4	
23.27.11.21.19.11	Level Gage Glasses	5	
23.27.11.21.19.13	Level Bull's Eyes	5	
23.27.11.21.21	Level Recorders	4	
23.27.11.21.23	Level Sensors	4	
23.27.11.23	Weighing Instrument And Controls	3	
23.27.11.23.11	Weight Alarm Modules	4	
23.27.11.23.13	Weight Control Modules	4	
23.27.11.23.15	Weight Detectors	4	
23.27.11.23.17	Weight Indicators	4	
23.27.11.23.19	Weight Recorders	4	
23.27.11.23.21	Weight Sensors	4	
23.27.11.25	Metal Concentration Instrument And Controls	3	
23.27.11.25.11	Metal Detectors	4	
23.27.11.27	Gas Instrument And Controls	3	
23.27.11.27.11	Gas Alarm Modules	4	
23.27.11.27.13	Gas Control Modules	4	
23.27.11.27.15	Gas Controllers	4	
23.27.11.27.15.11	Digital Gas Controllers	5	
23.27.11.27.15.13	Electric Gas Controllers	5	
23.27.11.27.15.15	Pneumatic Hating Controllers	5	
23.27.11.27.15.17	Hydraulic Gas Controllers	5	
23.27.11.27.17	Gas Detectors	4	
23.27.11.27.17.11	Air Pollution Detectors	5	
23.27.11.27.17.13	Radon Detectors	5	
23.27.11.27.17.15	Carbon Dioxide Detectors	5	
23.27.11.27.17.17	Hydrogen Detectors	5	
23.27.11.27.17.19	Oxygen Detectors	5	
23.27.11.27.17.21	Halon Detectors	5	
23.27.11.27.19	Gas Indicators	4	
23.27.11.27.21	Gas Analyzers	4	
23.27.11.29	Infrared Instrument And Controls	3	
23.27.11.29.11	Photoelectric Cells	4	
23.27.11.29.13	Infrared Control Modules	4	
23.27.11.29.15	Infrared Controllers	4	
23.27.11.29.15.11	Digital Infrared Controllers	5	
23.27.11.29.15.13	Electric Infrared Controllers	5	
23.27.11.29.15.15	Pneumatic Hating Controllers	5	
23.27.11.29.15.17	Hydraulic Infrared Controllers	5	
23.27.13.00	Control and Monitoring Boards Panels	2	
23.27.13.11	Internal Climate Monitoring and Control Panel	3	
23.27.13.13	Building Control Systems	3	
23.27.13.13.11	Building Automated Control Panels	4	
23.27.13.13.13	Building Automated Systems	4	
23.27.13.13.15	Building Monitoring Control Panels	4	
23.27.13.15	Process Control Panels	3	
23.27.13.15.11	Gaseous Waste Monitoring and Control Panels	4	
23.27.15.00	Building Automation and Control	2	
23.27.15.11	Building Clock Controls	3	
23.27.15.13	Building Door Controls	3	
23.27.15.15	Elevator Monitoring and Controls	3	
23.27.15.17	Energy Monitoring and Controls	3	
23.27.15.19	Building Environmental Controls	3	
23.27.15.21	Building Lighting Controls	3	
23.27.15.21.11	Building Lighting Control Panel	4	
23.27.15.21.13	Lighting Relay Control Panel	4	
23.27.15.23	HVAC Controls	3	
23.27.15.23.11	HVAC Main Control Panels	4	
23.27.15.23.13	HVAC Local Control Panels	4	
23.27.15.23.15	HVAC Control Clocks	4	
23.27.15.25	Equipment Control Panels	3	
23.27.17.00	Pumps	2	
23.27.17.11	Axial Split Pumps	3	
23.27.17.13	Centrifugal Pumps	3	
23.27.17.15	Diaphragm Pumps	3	
23.27.17.17	Duplex Pumps	3	
23.27.17.19	Gear Pumps	3	
23.27.17.21	Liquid Ring Pumps	3	
23.27.17.23	Macerator Pumps	3	
23.27.17.23.11	Combined Macerator Pumps	4	
23.27.17.25	Progressive Cavity Pumps	3	
23.27.17.27	Ram Pumps	3	
23.27.17.29	Reciprocating Pumps	3	
23.27.17.31	Rotary Pumps	3	
23.27.17.31.11	Rotary Cam Pumps	4	
23.27.17.31.13	Rotary Lobe Pumps	4	
23.27.17.31.15	Rotary Screw Pumps	4	
23.27.17.31.17	Rotary Vane Pumps	4	
23.27.17.33	Rotating Piston Pumps	3	
23.27.17.35	Sewage Ejectors	3	
23.27.17.35.11	Submersible Sewage Ejectors	4	
23.27.17.37	Simplex Pumps	3	
23.27.17.39	Sliding Vane Pumps	3	
23.27.17.41	Turbine Pumps	3	
23.27.17.43	Worm Gear Pumps	3	
23.27.17.45	Pump Components?	3	
23.27.19.00	Engines	2	
23.27.19.11	Reciprocating Engines	3	
23.27.19.13	Rotary Engines	3	
23.27.19.15	Turbine Engines	3	
23.27.21.00	Compressors	2	
23.27.21.11	Axial Flow Compressors	3	
23.27.21.13	Centrifugal Compressors	3	
23.27.21.15	Reciprocating Compressors	3	
23.27.21.15.11	Diaphragm Reciprocating Compressors	4	
23.27.21.15.13	Double Acting Reciprocating Compressors	4	
23.27.21.15.15	Single Acting Reciprocating Compressors	4	
23.27.21.17	Rotary Compressors	3	
23.27.21.17.11	Rotary Liquid Ring Compressors	4	
23.27.21.17.13	Rotary Lobe Compressors	4	
23.27.21.17.15	Rotary Screw Compressors	4	
23.27.21.17.17	Rotary Scroll Compressors	4	
23.27.21.17.19	Rotary Vane Compressors	4	
23.27.23.00	Heat Exchangers	2	
23.27.23.11	Heat Exchanger Economizers	3	
23.27.23.13	Plate and Frame Heat Exchangers	3	
23.27.23.13.11	Plate and Frame Regenerative Heat Exchangers	4	
23.27.23.15	Shell and Tube Heat Exchangers	3	
23.27.23.15.11	Shell and Tube Regenerative Heat Exchangers	4	
23.27.23.17	Tube and Fin Heat Exchangers	3	
23.27.23.19	Spiral Heat Exchangers	3	
23.27.23.19.11	Heat Exchangers for Ventilation Air	4	
23.27.23.21	Adiabatic Wheel Heat Exchangers	3	
23.27.23.23	Plate and Fin Heat Exchangers	3	
23.27.23.23.11	Straight Fin Plate and Fin Heat Exchangers	4	
23.27.23.23.13	Offset Fin Plate and Fin Heat Exchangers	4	
23.27.23.23.15	Wavy Fin Plate and Fin Heat Exchangers	4	
23.27.23.25	Fluid Heat Exchangers	3	
23.27.25.00	Heaters for Supplied Liquids 	2	
23.27.25.11	Liquid Electric Heaters	3	
23.27.25.13	Liquid Gas Heaters	3	
23.27.25.15	Liquid Steam Heaters	3	
23.27.25.17	Liquid Fuel Oil Heaters	3	
23.27.25.17.11	Fuel Oil Pre Heaters	4	
23.27.27.00	Pressure Reducing Stations	2	
23.27.27.11	Multiple Stage Pressure Reducing Stations	3	
23.27.27.13	Single Stage Pressure Reducing Stations	3	
23.27.29.00	Tanks and Storage Structures	2	
23.27.29.11	Reservoirs	3	
23.27.29.13	Tank Foundations	3	
23.27.29.13.11	Tank Support Structures	4	
23.27.29.13.13	Tank Foundation Slabs	4	
23.27.29.15	Specialized Tanks	3	
23.27.29.15.11	Cryogenic Tanks	4	
23.27.29.15.13	Flash Tanks	4	
23.27.29.15.13.11	Steam Flash Tanks	5	
23.27.29.15.15	Septic Tanks	4	
23.27.29.15.17	Siphon Tanks	4	
23.27.29.17	Storage Constructions	3	
23.27.29.17.11	Water Towers	4	
23.27.29.17.13	Silos	4	
23.27.29.17.15	Storage Bunkers	4	
23.27.29.19	Tanks	3	
23.27.29.19.11	Multiple Wall Tanks	4	
23.27.29.19.11.11	Multiple Walled Pressure Tanks	5	
23.27.29.19.11.13	Multiple Walled Vacuum Tanks	5	
23.27.29.19.11.15	Multiple Walled Vented Tanks	5	
23.27.29.19.13	Single Walled Tanks	4	
23.27.29.19.13.11	Single Walled Pressure Tanks	5	
23.27.29.19.13.13	Single Walled Vacuum Tanks	5	
23.27.29.19.13.15	Single Walled Vented Tanks	5	
23.27.29.21	Tank Containments	3	
23.27.29.21.11	Aboveground Tank Containments	4	
23.27.29.21.11.11	Aboveground Primary Tank Containments	5	
23.27.29.21.11.13	Aboveground Secondary Tank Containments	5	
23.27.29.21.11.15	Aboveground Tertiary Tank Containments	5	
23.27.29.21.13	Underground Tank Containments	4	
23.27.29.21.13.11	Underground Primary Tank Containments	5	
23.27.29.21.13.13	Underground Secondary Tank Containments	5	
23.27.29.21.13.15	Underground Tertiary Tank Containments	5	
23.27.29.23	Tank Linings	3	
23.27.29.23.11	Tank Bladders	4	
23.27.29.23.13	Rubber Tank Linings	4	
23.27.29.25	Tank Components	3	
23.27.29.25.11	Overflow Regulators	4	
23.27.29.25.13	Fill and Valve Caps	4	
23.27.29.25.15	Tank Vents	4	
23.27.31.00	Valves	2	
23.27.31.11	Backflow Preventors	3	
23.27.31.13	Balancing Valves	3	
23.27.31.13.11	Gate Balancing Valves	4	
23.27.31.13.13	Butterfly Balancing Valves	4	
23.27.31.13.15	Plug Balancing Valves	4	
23.27.31.13.17	Globe Balancing Valves	4	
23.27.31.13.19	Check Balancing Valves	4	
23.27.31.13.21	Diaphragm Balancing Valves	4	
23.27.31.15	Ball Valves	3	
23.27.31.17	Butterfly Valves	3	
23.27.31.17.11	Lug Pattern Butterfly Valves	4	
23.27.31.17.13	Wafer Pattern Butterfly Valves	4	
23.27.31.19	Check Valves	3	
23.27.31.19.11	Ball Check Valves	4	
23.27.31.19.13	Clapper CheckValves	4	
23.27.31.19.15	Cone Type Check Valves	4	
23.27.31.19.17	Demand Check Valves	4	
23.27.31.19.19	Diaphragm Check Valves	4	
23.27.31.19.21	Lift Check Valves	4	
23.27.31.19.23	Spring Type Check Valves	4	
23.27.31.19.25	Stop Check Valves	4	
23.27.31.19.27	Swing Check Valves	4	
23.27.31.21	Diaphragm Valves	3	
23.27.31.23	Float Valves	3	
23.27.31.25	Gate Valves	3	
23.27.31.27	Globe Valves	3	
23.27.31.29	Mixing Valves	3	
23.27.31.29.11	Manual Mixing Valves	4	
23.27.31.29.13	Pressure Balanced Controlled Mixing Valves	4	
23.27.31.29.15	Thermostatically Controlled Mixing Valves	4	
23.27.31.31	Needle Valves	3	
23.27.31.33	Orifice Valves	3	
23.27.31.35	Pinch Valves	3	
23.27.31.37	Plug Drain Valves	3	
23.27.31.39	Plug Valves	3	
23.27.31.41	Poppet Valves	3	
23.27.31.43	Post Indicator Valves	3	
23.27.31.45	Preaction Valves	3	
23.27.31.45.11	Electronic Actuated Preaction Valves	4	
23.27.31.45.13	Water Seal Enabled Preaction Valves	4	
23.27.31.47	Pressure Regulating Valves	3	
23.27.31.49	Relief Valves	3	
23.27.31.49.11	Pressure Relief Valves	4	
23.27.31.49.13	Pressure Temperature Relief Valves	4	
23.27.31.51	Rupture Disks	3	
23.27.31.53	Safety Valves	3	
23.27.31.53.11	Pressure Safety Valves	4	
23.27.31.53.13	Pressure Temperature Safety Valves	4	
23.27.31.55	Sentinel Valves	3	
23.27.31.57	Slider Valves	3	
23.27.31.59	Slush Valves	3	
23.27.31.61	Thermostatic Expansion Valves	3	
23.27.31.63	Valves Boxes	3	
23.27.33.00	Valve Actuators	2	
23.27.33.11	Electrical Valve Actuators	3	
23.27.33.11.11	Solenoid Valve Actuators	4	
23.27.33.13	Hydraulic Valve Actuators	3	
23.27.33.15	Motor Operated Valve Actuators	3	
23.27.33.17	Pneumatic Valve Actuators	3	
23.27.35.00	Variable Speed Drives	2	
23.27.35.11	Hydraulic Variable Speed Drives	3	
23.27.35.11.11	Hydrodynamic Variable Speed Drives	4	
23.27.35.11.13	Hydrostatic Variable Speed Drives	4	
23.27.35.11.15	Hydroviscous Variable Speed Drives	4	
23.27.35.13	Variable Pitch Drives	3	
23.27.35.13.11	Pulley Variable Pitch Drives	4	
23.27.35.13.13	Traction Variable Pitch Drives	4	
23.27.35.15	Transmission Devices	3	
23.27.35.15.11	Fluid Drive Transmissions 	4	
23.27.35.15.13	Gear Boxes	4	
23.27.37.00	Liquid Traps	2	
23.27.37.11	Grease Traps	3	
23.27.37.13	Oil Traps	3	
23.27.37.15	Steam Traps	3	
23.27.37.15.11	Disc Steam Traps	4	
23.27.37.15.13	Float and Thermostatic Steam Traps	4	
23.27.37.15.15	Float Steam Trap	4	
23.27.37.15.17	Inverted Basket Steam Traps	4	
23.27.37.15.19	Orifice Steam Traps	4	
23.27.39.00	Piping	2	
23.27.39.11	Double Walled Pipes	3	
23.27.39.11.11	Aboveground Double Walled Pipes	4	
23.27.39.11.13	Underground Double Walled Pipes	4	
23.27.39.13	Single Walled Pipes	3	
23.27.39.13.11	Aboveground Single Walled Pipes	4	
23.27.39.13.13	Underground Single Walled Pipes	4	
23.27.41.00	Pipe Repair Equipment	2	
23.27.41.11	Pipe Band It Kits	3	
23.27.43.00	Pipe Fittings	2	
23.27.43.11	Mechanical Pipe Fasteners	3	
23.27.43.13	Mechanical Pipe Supports	3	
23.27.43.15	Pipe Expansion Joints	3	
23.27.43.17	Water Hammer Arrestors	3	
23.27.43.19	Pipe Expansion Compensators	3	
23.27.45.00	Pipe Flanges	2	
23.27.45.11	Blind Pipe Flanges	3	
23.27.45.13	Lap Joint Pipe Flanges	3	
23.27.45.15	Orifice Pipe Flanges	3	
23.27.45.17	Plate Pipe Flanges	3	
23.27.45.19	Reducing Pipe Flanges	3	
23.27.45.21	Slip On Pipe Flanges	3	
23.27.45.23	Socket Weld Pipe Flanges	3	
23.27.45.25	Spectacle Pipe Flanges	3	
23.27.45.27	Threaded Pipe Flanges	3	
23.27.45.29	Weldneck Pipe Flanges	3	
23.27.47.00	Pipe Adapters	2	
23.27.47.11	Female Pipe Adapters	3	
23.27.47.13	Male Pipe Adapters	3	
23.27.47.15	Terminal Pipe Adapters	3	
23.27.47.17	Hi Low Converter Pipe Adapters	3	
23.27.47.19	Twist To Lock Y Cord Pipe Adapters	3	
23.27.47.21	Auto Converter Pipe Adapters	3	
23.27.47.23	Conduit Box Pipe Adapters	3	
23.27.47.25	Reduce Drive Pipe Adapters	3	
23.27.47.27	Red Pipe Adapters	3	
23.27.49.00	Pipe Couplings	2	
23.27.49.11	Rigid Pipe Couplings	3	
23.27.49.13	Flexible Pipe Couplings	3	
23.27.49.13.11	Coil Spring Pipe Couplings	4	
23.27.49.13.13	Double Loop Pipe Couplings	4	
23.27.49.13.15	Tire Pipe Couplings	4	
23.27.49.13.17	Flexible Link Pipe Couplings	4	
23.27.49.13.19	Multi Jaw Pipe Couplings	4	
23.27.49.13.21	Helical Flex Pipe Couplings	4	
23.27.49.13.23	Magnetic Pipe Couplings	4	
23.27.49.13.25	Metal Bellows Pipe Couplings	4	
23.27.49.13.27	Diaphragm Pipe Couplings	4	
23.27.49.13.29	Roller Chain Pipe Couplings	4	
23.27.49.13.31	Schmidt Pipe Couplings	4	
23.27.49.13.33	Shear Pipe Couplings	4	
23.27.49.13.35	Sliding Block Pipe Couplings	4	
23.27.49.13.37	Steel Grid Pipe Couplings	4	
23.27.49.13.39	Spider Pipe Couplings	4	
23.27.49.13.41	Flexible Disc Pipe Couplings	4	
23.27.51.00	Pipe Elbows	2	
23.27.51.11	45 Degree Pipe Elbows	3	
23.27.51.13	90 Degree Pipe Elbows	3	
23.27.51.15	Reducing Pipe Elbows	3	
23.27.53.00	Pipe Caps	2	
23.27.53.11	Threaded Pipe Caps	3	
23.27.53.13	Tapered Pipe Caps	3	
23.27.53.15	Anti-roll Pipe Caps	3	
23.27.53.17	Knurled Pipe Caps	3	
23.27.53.19	Slotted Head Pipe Caps	3	
23.27.53.21	Retaining Ring Pipe Caps	3	
23.27.53.23	Tear Tab Pipe Caps	3	
23.27.53.25	Hanger Tip Pipe Caps	3	
23.27.53.27	Pull Tab Pipe Caps	3	
23.27.53.29	Vented Pipe Caps	3	
23.27.55.00	Liquid Treatment Components	2	
23.27.55.11	Liquid Filters	3	
23.27.55.11.11	Water Filters	4	
23.27.55.13	Liquid Sterilizers	3	
23.27.55.15	Liquid Salinators	3	
23.27.55.17	Liquid Chlorinators	3	
23.27.55.19	Liquid Ionizers	3	
23.27.55.21	Liquid Deionizers	3	
23.27.55.23	Liquid Deaerators	3	
23.27.55.23.11	Centrifugal Liquid Deaerators	4	
23.27.55.23.13	Spray Type Liquid Deaerators	4	
23.27.55.23.15	Tray Type Liquid Deaerators	4	
23.27.55.25	Liquid Disinfecting Ultraviolet Lighting	3	
23.27.55.27	Liquid Softeners	3	
23.27.55.27.11	Water Softeners	4	
23.27.55.29	Liquid Strainers	3	
23.27.55.29.11	Basket Strainers	4	
23.27.55.29.13	Conical Strainers	4	
23.27.55.29.15	Tee Strainers	4	
23.27.55.29.17	Y Strainers	4	
23.27.55.29.19	Reverse Osmosis Units	4	
23.27.55.29.21	Solid Separators	4	
23.27.55.31	Liquid Chemical Feeders	3	
23.27.55.31.11	Liquid Chemical Feeders	4	
23.27.55.31.13	Solid Chemical Feeders	4	
23.27.55.31.15	Gas Chemical Feeders	4	
23.27.55.33	Liquid Treatment Package Units	3	
23.27.55.33.11	Water Treatment Package Units	4	
23.27.55.35	Liquid Separators	3	
23.27.55.35.11	Centrifuge Liquid Separators	4	
23.27.55.35.13	Demister Pad Liquid Separators	4	
23.27.55.35.15	Electrical Cyclone Liquid Separators	4	
23.27.55.35.17	Hydro Cyclone Liquid Separators	4	
23.27.55.35.19	Mechanical Liquid Separators	4	
23.27.55.35.21	Mist Eliminator Liquid Separators	4	
23.27.55.35.23	Tangential Liquid Separators	4	
23.27.55.35.25	Magnetic Electronic Water Treatment	4	
23.27.55.35.27	Oil Water Curtain Separators	4	
23.27.57.00	Gas Treatment Components	2	
23.27.57.11	Vapor Traps	3	
23.27.57.13	Extractors	3	
23.27.57.13.11	Extractors for Process Air	4	
23.27.57.15	Air Injectors	3	
23.27.57.17	Air Ejectors	3	
23.27.57.19	Air Scrubbers	3	
23.27.57.19.11	Dual Throat Air Scrubbers	4	
23.27.57.19.13	Multiple Venture Air Scrubbers	4	
23.27.57.19.15	Packed Bed Air Scrubbers	4	
23.27.57.21	Supply Gas Treatment	3	
23.27.57.21.11	Steam Treatment	4	
23.27.57.21.13	Fuel Gas Treatment	4	
23.27.57.21.13.11	Gas Filters	5	
23.27.57.23	Electronic Air Purifiers	3	
23.27.57.25	Mechanically Aided Air Scrubbers	3	
23.27.57.27	Air Filters	3	
23.27.57.27.11	Air Filter Components?	4	
23.27.57.27.11.11	Air Filter Media	5	
23.27.57.27.11.13	Control Air Filter Assemblies	5	
23.27.57.27.13	High Efficiency Air Filters	4	
23.27.57.27.15	ULPA Filters	4	
23.27.57.27.17	HEPA Filters	4	
23.27.57.27.19	Bag Filters	4	
23.27.57.27.21	Air Filter Housings	4	
23.27.57.27.23	Air Charcoal Filters	4	
23.27.57.27.25	Roll Type Filters	4	
23.27.57.29	Dust Collectors	3	
23.27.57.31	Electronic Air Cleaners	3	
23.27.57.33	Air Fresheners	3	
23.27.57.35	Air Treatment Components?	3	
23.27.57.35.11	Air Deodorization Products	4	
23.27.57.35.13	Moisture Absorbents	4	
23.27.59.00	Recycling Equipment	2	
23.27.59.11	Recycling Balers	3	
23.27.59.11.11	Recycling Cardboard Balers	4	
23.27.59.11.13	Recycling Paper Balers	4	
23.27.59.11.15	Recycling Plastic Balers	4	
23.27.59.11.17	Recycling Wood Balers	4	
23.27.59.13	Recycling Bins	3	
23.27.59.15	Recycling Compactors	3	
23.27.59.15.11	Cardboard Compactors	4	
23.27.59.15.13	Metal Compactors	4	
23.27.59.15.15	Paper Compactors	4	
23.27.59.15.17	Plastic Compactors	4	
23.27.59.15.19	Trash Compactors	4	
23.27.59.15.21	Wood Compactors	4	
23.27.61.00	Incinerators	2	
23.27.61.11	Trash Incinerators	3	
23.27.61.13	Document Incinerators	3	
23.27.63.00	Mechanical Insulation and Linings	2	
23.27.63.11	Pipe Insulation	3	
23.27.63.13	Equipment Insulation Blankets	3	
23.27.65.00	Equipment Acoustic Insulation	2	
23.27.65.11	Sound Dampening Equipment Mounts	3	
23.27.67.00	Corrosion Proofing Equipment	2	
23.27.67.11	Zinc Bars	3	
23.27.67.13	Zinc Tapes	3	
23.27.69.00	Antivibration Mountings	2	
23.27.69.11	Vibration Equipment Mounts	3	
23.27.71.00	Building Maintenance Equipment	2	
23.27.71.11	Window Washing Systems	3	
23.27.71.13	Building Maintenance Cradles and Platforms	3	
23.27.71.15	Roof Trolley Systems	3	
23.27.71.17	Traveling Ladder Systems	3	
23.27.71.19	Ancillary Building Maintenance Items	3	
23.27.71.19.11	Building Safety Tracks	4	
23.27.71.19.13	Anchors for Building Maintenance	4	
23.27.71.21	Fall Arrest Systems	3	
23.29.00.00	Facility and Occupant Protection Products	1	
23.29.11.00	Security Detection and Monitoring	2	
23.29.11.11	Closed Circuit Television Equipment	3	
23.29.11.11.11	Infra Red CCTV Cameras	4	
23.29.11.11.13	Visual Light Wavelength CCTV Cameras	4	
23.29.11.11.15	CCTV Camera Enclosures	4	
23.29.11.11.17	Security Camera Controllers	4	
23.29.11.11.19	Security Camera Multiplexors	4	
23.29.11.11.21	Security Camera Monitoring System Panels	4	
23.29.11.13	Security Video Imaging System Equipment	3	
23.29.11.13.11	Security Video Monitors	4	
23.29.11.13.13	Security Video Recorders	4	
23.29.11.13.13.11	Security Analog Video Recorders	5	
23.29.11.13.13.13	Security Digital Video Recorders	5	
23.29.11.15	Explosive Detectors	3	
23.29.11.15.11	Explosive Detector Sniffers	4	
23.29.11.15.11.11	Chemical Explosive Detectors	5	
23.29.11.15.11.13	Particulate Explosive Detectors	5	
23.29.11.15.13	Explosive Detector Spectral Analyzers	4	
23.29.11.17	Security Metal Detectors	3	
23.29.11.17.11	Security Weather Resistant Walk Through Metal Detectors	4	
23.29.11.17.13	Security Indoor Walk Through Metal Detectors	4	
23.29.11.17.15	Security Hand Held Metal Detectors	4	
23.29.11.19	Security X Ray Machines	3	
23.29.11.19.11	Security X Ray Conveyor Machines	4	
23.29.11.19.13	Security Personnel X Ray Machines	4	
23.29.11.21	Security Sensors	3	
23.29.11.21.11	Audio Security Sensors	4	
23.29.11.21.13	Security Ground Loop Sensors	4	
23.29.11.21.15	Infra Red Security Sensors	4	
23.29.11.21.17	Ultrasonic Security Sensors	4	
23.29.11.21.19	Security Vibration Sensors	4	
23.29.11.23	Intrusion Detection Devices	3	
23.29.11.23.11	Intrusion Detection Buried Cables	4	
23.29.11.23.13	Intrusion Detection Fiber Optic Fence Line Loops	4	
23.29.11.23.15	Intrusion Detection Microwave Alarms	4	
23.29.11.23.17	Intrusion Detection Photoelectric Sensors	4	
23.29.11.23.19	Intrusion Detection Door Monitoring Switches	4	
23.29.11.23.21	Pressure Mats	4	
23.29.11.23.23	Door Micro Switch Contacts	4	
23.29.11.23.25	Window Micro Switch Contacts	4	
23.29.11.23.27	Break Glass Detection	4	
23.29.11.23.29	Movement Vibration Detection	4	
23.29.11.23.31	Infra Red Radiation Personnel Detectors	4	
23.29.11.23.33	Microwave Personnel Detectors	4	
23.29.11.23.35	Security Autodialers	4	
23.29.11.25	Presence Detection Registration	3	
23.29.11.25.11	Personnel Clocking In and Recording Equipment	4	
23.29.11.25.13	Surveillance Mirrors	4	
23.29.11.25.15	Manual Alert Control	4	
23.29.11.25.17	Security Door Bells	4	
23.29.11.25.19	Security Buzzers	4	
23.29.11.27	Security Keypads	3	
23.29.11.27.11	Alarm Keypads	4	
23.29.11.27.13	Security Keypads	4	
23.29.11.29	Vehicle Inspection Devices	3	
23.29.11.29.11	Undercarriage Inspection Lighting	4	
23.29.13.00	Security Access Controls	2	
23.29.13.11	Personnel Biometric Readers	3	
23.29.13.11.11	Fingerprint Readers	4	
23.29.13.11.13	Hand Geometry Readers	4	
23.29.13.11.15	Iris Scanners	4	
23.29.13.11.17	Retinal Scanners	4	
23.29.13.11.19	Vein Recognition Readers	4	
23.29.13.13	Personnel Card Readers	3	
23.29.13.13.11	Personnel Contact Card Readers	4	
23.29.13.13.11.11	Mag Stripe Personnel Contact Card Readers	5	
23.29.13.13.11.13	Smart Card Personnel Contact Card Readers	5	
23.29.13.13.11.15	Weigand Personnel Contact Card Readers	5	
23.29.13.13.13	Personnel Contactless Card Readers	4	
23.29.13.13.13.11	Barcode Personnel Contactless Card Readers	5	
23.29.13.13.13.13	Near Field Proximity Personnel Contactless Card Readers	5	
23.29.13.13.13.15	Proximity Personnel Contactless Card Readers	5	
23.29.13.15	Personnel Counting Equipment	3	
23.29.13.17	Security Door Answering Controls	3	
23.29.13.19	Electronic Key Equipment	3	
23.29.13.21	Security Personnel Access Keypads	3	
23.29.13.23	Access Control Turnstiles	3	
23.29.13.23.11	Waist Height Turnstiles	4	
23.29.13.23.13	Full Height Turnstiles	4	
23.29.13.23.15	Portable Post and Railing Barriers	4	
23.29.15.00	Secure Storage Structures and Products	2	
23.29.15.11	Vaults	3	
23.29.15.11.11	Prefabricated Room Vaults	4	
23.29.15.11.13	Commercial Vaults	4	
23.29.15.11.15	Residential Vaults	4	
23.29.15.13	Safes	3	
23.29.15.13.11	Commercial Safes	4	
23.29.15.13.13	Residential Safes	4	
23.29.15.15	Lockers	3	
23.29.15.15.11	Metal Lockers	4	
23.29.15.15.13	Wood Lockers	4	
23.29.15.15.15	Plastic Laminate Clad Lockers	4	
23.29.15.15.17	Plastic Lockers	4	
23.29.15.15.19	Glass Lockers	4	
23.29.15.15.21	Wire Mesh Storage Lockers	4	
23.29.17.00	Property Storage Locks	2	
23.29.17.11	Bicycle Locks	3	
23.29.17.13	Padlocks	3	
23.29.17.13.11	Combination Padlocks	4	
23.29.17.13.13	Pin Tumbler Padlocks	4	
23.29.19.00	Chemical Biological Radiological Protection	2	
23.29.19.11	Prefabricated Mail Screening Products	3	
23.29.19.13	Biological Safety Cabinets	3	
23.29.21.00	Equipment for Security of Information	2	
23.29.21.11	Centralized Code Reading Equipment	3	
23.29.23.00	Fireproofing Components	2	
23.29.23.11	Fireproofing Gaskets	3	
23.29.23.13	Fireproofing Fillers for Threaded Couplings	3	
23.29.23.15	Fireproof Pipe Sleeves	3	
23.29.23.17	Smoke Seals for Ductwork	3	
23.29.25.00	Fire Fighting Equipment	2	
23.29.25.11	Fire Fighting Terminals	3	
23.29.25.11.11	Fire Fighting Terminal Components	4	
23.29.25.11.13	Water Fire Fighting Terminals	4	
23.29.25.11.15	Gaseous Fire Fighting Terminals	4	
23.29.25.11.17	Foam Fire Fighting Terminals	4	
23.29.25.11.19	Powder Fire Fighting Terminals	4	
23.29.25.11.21	Fire Fighting Media 	4	
23.29.25.11.23	Fire Fighting Gas Terminals	4	
23.29.25.13	Fire Hydrants	3	
23.29.25.13.11	Dry Barrel Fire Hydrants	4	
23.29.25.13.13	Wet Barrel Fire Hydrants	4	
23.29.25.15	Fire Hose Equipment	3	
23.29.25.15.11	Fire Hoses	4	
23.29.25.15.13	Fire Hose Outlets	4	
23.29.25.15.15	Cabinets for Fire Hoses	4	
23.29.25.15.17	Fire Hose Reels	4	
23.29.25.15.19	Fire Hose Connectors	4	
23.29.25.15.19.11	Fire Fighting Standpipes	5	
23.29.25.15.19.13	Fire Fighting Pumper Connections	5	
23.29.25.17	Fire Nozzles	3	
23.29.25.17.11	Fire Fog Nozzles	4	
23.29.25.17.13	Fire Stream Nozzles	4	
23.29.25.17.15	Fire Electrical Rated Nozzles	4	
23.29.25.19	Fire Extinguishers	3	
23.29.25.19.11	Stored Pressure Fire Extinguishers	4	
23.29.25.19.11.11	Stored Pressure Fire Extinguishers With Gauge	5	
23.29.25.19.13	Non Stainless Steel Fire Extinguishers	4	
23.29.25.19.15	Non Rechargeable Fire Extinguishers	4	
23.29.25.19.17	Gas Cart Fire Extinguishers	4	
23.29.25.19.17.11	Gas Cart Fire Extinguishers With Gauge	5	
23.29.25.19.19	Foam Fire Extinguishers	4	
23.29.27.00	Fire Ventilation Equipment	2	
23.29.27.11	Fire Fighting Smoke Extractors	3	
23.29.29.00	Fire Detection Devices	2	
23.29.29.11	Fire Alarm Pull Stations	3	
23.29.29.11.11	Addressable Fire Alarm Pull Stations	4	
23.29.29.11.13	Non Addressable Fire Alarm Pull Stations	4	
23.29.29.13	Fire Detectors	3	
23.29.29.13.11	Smoke Detectors	4	
23.29.29.13.11.11	Spot Type Photoelectric Smoke Detectors	5	
23.29.29.13.11.13	Spot Type Ionization Smoke Detectors	5	
23.29.29.13.11.15	Spot Type Duct Photoelectric Smoke Detectors	5	
23.29.29.13.11.17	Spot Type Duct Ionization Smoke Detectors	5	
23.29.29.13.11.19	Beam Type Smoke Detectors	5	
23.29.29.13.13	Heat Detectors	4	
23.29.29.13.13.11	Fixed Temperature Heat Detectors	5	
23.29.29.13.13.13	Rate of Rise Heat Detectors	5	
23.29.29.13.15	Flame Detectors	4	
23.29.29.13.17	Spark and Ember Detectors	4	
23.29.29.13.19	Radiant Energy Detectors	4	
23.29.29.15	Fire Switches	3	
23.29.29.15.11	Pressure Fire Alarm Water Flow Switches	4	
23.29.29.15.13	Paddle Fire Alarm Water Flow Switches	4	
23.29.29.15.15	Fire Tamper Switches	4	
23.29.31.00	Fire Notification Appliances	2	
23.29.31.11	Fire Alarm Annunicator Panels	3	
23.29.31.11.11	Audible Fire Alarm Annunicator Panels	4	
23.29.31.11.13	Visible Fire Alarm Annunicator Panels	4	
23.29.31.11.15	Combination Fire Alarm Annunicator Panels	4	
23.29.31.13	Fire Alarm Control Panels	3	
23.29.31.13.11	Main Fire Alarm Control Panels	4	
23.29.31.13.13	Secondary Fire Alarm Control Panels	4	
23.29.31.13.15	Fire Alarm Audio Control Panels	4	
23.29.31.13.17	Fire Alarm Smoke Control Panels	4	
23.29.31.15	Audible Fire Notification Devices	3	
23.29.31.15.11	Audible Fire Notification Devices Bell	4	
23.29.31.15.13	Audible Fire Notification Devices Horn	4	
23.29.31.15.15	Audible Fire Notification Devices Chime	4	
23.29.31.15.17	Audible Fire Notification Devices Speaker	4	
23.29.31.17	Visible Fire Notification Devices	3	
23.29.31.17.11	Visible Fire Notification Device Lights	4	
23.29.31.19	Combination Audible and Visible Fire Notification Devices	3	
23.29.31.21	Fire Alarm Communicators	3	
23.29.31.23	Fire Alarm Central Stations	3	
23.29.31.23.11	Fire Alarm Central Station Transmitters	4	
23.29.31.23.13	Fire Alarm Central Station Receivers	4	
23.29.31.23.15	Fire Alarm Central Station Combination Transmitter and Receivers	4	
23.29.31.25	Fire Alarm Event Recorders	3	
23.29.31.27	Fire Alarm Event Printers	3	
23.29.31.29	Fire Alarm Remote Controllers	3	
23.29.31.31	Fire Alarm Remote Amplifiers	3	
23.29.31.33	Fire Pump Controllers	3	
23.29.31.35	Jockey Pump Controllers	3	
23.29.33.00	Fire Suppression System Components	2	
23.29.33.11	Water Based Suppression Equipment	3	
23.29.33.11.11	Pendant Sprinkler Heads	4	
23.29.33.11.11.11	Wet Pendant Sprinkler Heads	5	
23.29.33.11.11.13	Dry Pendant Sprinkler Heads	5	
23.29.33.11.11.15	Open Pendant Sprinkler Heads	5	
23.29.33.11.13	Upright Sprinkler Heads	4	
23.29.33.11.13.11	Wet Upright Sprinkler Heads	5	
23.29.33.11.13.13	Dry Upright Sprinkler Heads	5	
23.29.33.11.13.15	Open Upright Sprinkler Heads	5	
23.29.33.11.15	Side Wall Sprinkler Heads	4	
23.29.33.11.15.11	Wet Side Wall Sprinkler Heads	5	
23.29.33.11.15.13	Dry Side Wall Sprinkler Heads	5	
23.29.33.11.17	Dry Pipe Valves	4	
23.29.33.11.19	Water Mist Systems	4	
23.29.33.13	Non Water Based Suppression Equipment	3	
23.29.33.13.11	Clean Agent Gaseous Suppression Equipment	4	
23.29.33.13.13	Carbon Dioxide Suppression Equipment	4	
23.29.33.13.15	Halon Suppression Equipment	4	
23.29.33.13.17	Wet Chemical Fire Suppression Equipment	4	
23.29.33.13.19	Dry Chemical Fire Suppression Equipment	4	
23.29.33.13.21	Foam Fire Suppression Equipment	4	
23.29.33.15	Fire Blankets	3	
23.29.35.00	Fire Rescue Component	2	
23.29.35.11	Evacuation Chairs	3	
23.29.35.13	Evacuation Slides	3	
23.29.37.00	Occupational Safety and Health Equipment	2	
23.29.37.11	Emergency Drench Hoses	3	
23.29.37.13	Emergency Eye Wash Stations	3	
23.29.37.13.11	Counter Top Eye Wash Stations	4	
23.29.37.13.13	Floor Mounted Eye Wash Stations	4	
23.29.37.13.15	Combination Emergency Eye Wash Stations	4	
23.29.37.13.17	Dedicated Emergency Eye Wash Stations	4	
23.29.37.15	Emergency Showers	3	
23.29.37.15.11	Combination Emergency Showers	4	
23.29.37.15.13	Dedicated Emergency Showers	4	
23.29.39.00	Environmental Safety Equipment	2	
23.29.39.11	Environmental Spill Kits	3	
23.29.39.13	Pollution Monitoring and Control	3	
23.29.39.13.11	Air Pollution Monitoring Systems	4	
23.29.39.13.13	Water Pollution Monitoring Systems	4	
23.29.39.15	Built In Failure Detection	3	
23.29.39.15.11	Infiltration Detection	4	
23.29.39.15.13	Service Leak Detection	4	
23.29.39.15.13.11	Gas Leak Detection Agents	5	
23.29.39.15.13.13	Water Leak Detection	5	
23.31.00.00	Plumbing Specific Products and Equipment	1	
23.31.11.00	Faucets	2	
23.31.11.11	Ball Faucets	3	
23.31.11.11.11	Sink Ball Faucets	4	
23.31.11.11.13	Bathtub Ball Faucets	4	
23.31.11.11.15	Shower Ball Faucets	4	
23.31.11.13	Compression Faucets	3	
23.31.11.13.11	Sink Compression Faucets	4	
23.31.11.13.13	Bathtub Compression Faucets	4	
23.31.11.13.15	Shower Compression Faucets	4	
23.31.11.15	Cartridge Faucets	3	
23.31.11.15.11	Sink Cartridge Faucets	4	
23.31.11.15.13	Bathtub Cartridge Faucets	4	
23.31.11.15.15	Shower Cartridge Faucets	4	
23.31.11.17	Disc Faucets	3	
23.31.11.17.11	Sink Disc Faucets	4	
23.31.11.17.13	Bathtub Disc Faucets	4	
23.31.11.17.15	Shower Disc Faucets	4	
23.31.11.19	Faucet Mixing Valves	3	
23.31.11.19.11	Thermostatically Controlled Faucet Mixing Valves	4	
23.31.11.19.13	Pressure Sensitive Faucet Mixing Valves	4	
23.31.11.19.15	Pressure Balanced Faucet Mixing Valves	4	
23.31.13.00	Sinks	2	
23.31.13.11	Single Sinks	3	
23.31.13.13	Dual Sinks	3	
23.31.13.15	Multiple Sinks	3	
23.31.13.17	Sink Components	3	
23.31.13.17.11	Sink Splashbacks	4	
23.31.13.17.13	Sink Drains	4	
23.31.13.19	Specialty Sinks	3	
23.31.13.19.11	Sacristy	4	
23.31.13.19.13	Darkroom Sinks	4	
23.31.13.19.15	Hairdressing Sinks	4	
23.31.13.19.17	Mop Sinks	4	
23.31.13.19.19	Service Sinks	4	
23.31.15.00	Bathtubs	2	
23.31.15.11	Bath Shower Units	3	
23.31.15.13	Sitz Baths	3	
23.31.15.15	Jacuzzi Baths	3	
23.31.15.17	Bathtub Components	3	
23.31.15.17.11	Bathtub Enclosures	4	
23.31.15.17.13	Bathtub Splashbacks	4	
23.31.15.17.15	Bathtub Panels	4	
23.31.15.17.17	Bathtub Seats	4	
23.31.15.17.19	Bathtub Screens	4	
23.31.15.17.21	Bathtub Grab Bars	4	
23.31.15.17.23	Bathtub Drains	4	
23.31.17.00	Showers	2	
23.31.17.11	Shower Compartments	3	
23.31.17.13	Shower Receptors	3	
23.31.17.15	Shower Enclosure Bases	3	
23.31.17.17	Shower Enclosures	3	
23.31.17.19	Shower Head Fixtures	3	
23.31.17.21	Shower Splashbacks	3	
23.31.17.23	Shower Seats	3	
23.31.17.25	Shower Screens	3	
23.31.17.27	Shower Curtains	3	
23.31.17.29	Shower Drains	3	
23.31.17.31	Shower Rods	3	
23.31.19.00	Toilets	2	
23.31.19.11	Combination Toilets	3	
23.31.19.11.11	Detention Combination Toilets	4	
23.31.19.13	Incinerating Toilets	3	
23.31.19.15	Tankless Toilets	3	
23.31.19.15.11	Floor Mounted Tankless Toilets	4	
23.31.19.15.13	Wall Mounted Tankless Toilets	4	
23.31.19.17	Toilets With Tank	3	
23.31.19.17.11	Floor Mounted Toilets With Tank	4	
23.31.19.17.13	Wall Mounted Toilets With Tank	4	
23.31.19.19	Water Closets?	3	
23.31.19.19.11	Water Operated Water Closets	4	
23.31.19.19.13	Chemical Biological Sanitary Disposal Units	4	
23.31.19.19.15	Sanitary Macerators	4	
23.31.19.19.17	Water Closet Seats	4	
23.31.19.19.19	Water Closet Tanks	4	
23.31.19.19.21	Sanitary Disposal Connectors	4	
23.31.21.00	Urinals	2	
23.31.21.11	Incinerating Urinals	3	
23.31.21.13	Water Flush Urinals	3	
23.31.21.13.11	Floor Water Flush Urinals	4	
23.31.21.13.13	Wall Mounted Water Flush Urinals	4	
23.31.21.15	Waterless Urinals	3	
23.31.21.15.11	Floor Waterless Urinals	4	
23.31.21.15.13	Wall Mounted Waterless Urinals	4	
23.31.23.00	Bidets	2	
23.31.25.00	Toilet and Bath Specialties	2	
23.31.25.11	Restroom Partitions	3	
23.31.25.11.11	Toilet Partitions	4	
23.31.25.11.13	Toilet Door Partitions	4	
23.31.25.11.15	Urinal Partitions	4	
23.31.25.11.17	Shower Partitions	4	
23.31.25.13	Bathroom Cabinets	3	
23.31.25.15	Hand Dryers	3	
23.31.25.17	Hair Dryers	3	
23.31.25.19	Restroom Paper Towel Accessories	3	
23.31.25.19.11	Paper Towel Dispensers	4	
23.31.25.19.13	Paper Towel Dispenser With Disposal Units	4	
23.31.25.21	Toilet Paper Dispensers	3	
23.31.25.23	Feminine Hygiene Components	3	
23.31.25.23.11	Sanitary Napkin Dispensers	4	
23.31.25.23.13	Sanitary Napkin Dispenser With Disposal Units	4	
23.31.25.23.15	Tampon Dispensers	4	
23.31.25.23.17	Tampon Dispenser With Disposal Units	4	
23.31.25.23.19	Combination Sanitary Napkin and Tampon Dispensers	4	
23.31.25.23.21	Combination Sanitary Napkin and Tampon Dispenser With Disposal Units	4	
23.31.25.25	Towel Bars	3	
23.31.25.25.11	Electric Heated Towel Bars	4	
23.31.25.25.13	Water Heated Towel Bars	4	
23.31.25.27	Robe Hooks	3	
23.31.25.29	Restroom Hand Soap Components	3	
23.31.25.29.11	Hand Soap Holders	4	
23.31.25.29.13	Hand Soap Dispensers	4	
23.31.25.31	Diaper Changing Units	3	
23.31.25.33	Bathroom Deodorizers	3	
23.31.27.00	Floor Drains	2	
23.31.27.11	Floor Drain Plugs	3	
23.31.27.13	Floor Drain Plug Chains	3	
23.31.27.15	Floor Drain Covers	3	
23.31.29.00	Hot Water Heaters	2	
23.31.29.11	Instantaneous Hot Water Heaters	3	
23.31.29.11.11	Electric Instantaneous Hot Water Heaters	4	
23.31.29.11.13	Gas Instantaneous Hot Water Heaters	4	
23.31.29.13	Hot Water Tank Heaters	3	
23.31.29.13.11	Hot Water Tank Electric Heaters	4	
23.31.29.13.13	Hot Water Tank Gas Heaters	4	
23.31.29.13.15	Hot Water Tank Steam Heaters	4	
23.31.29.13.17	Hot Water Tank Fuel Oil Heaters	4	
23.31.31.00	Drinking Fountains	2	
23.31.31.11	Drinking Fountain With Coolers	3	
23.31.31.13	Drinking Fountains With Direct Expansion Cooling	3	
23.31.33.00	Complete Sanitary Suites	2	
23.31.33.11	Complete Bathroom Suites	3	
23.31.35.00	Plumbing Tubing	2	
23.31.35.11	Tubing Reducers	3	
23.31.35.13	Tubing Couplings	3	
23.31.35.15	Tubing Elbows	3	
23.31.35.17	Tubing Plugs	3	
23.31.35.19	Tubing Tees	3	
23.33.00.00	HVAC Specific Products and Equipment	1	
23.33.11.00	Commercial Boilers	2	
23.33.11.11	Boiler Controls	3	
23.33.11.11.11	Boiler Control Panels	4	
23.33.11.11.13	Boiler Burner Controls	4	
23.33.11.13	Condensing Boilers	3	
23.33.11.15	Fire Tube Boilers	3	
23.33.11.15.11	High Pressure Steam Fire Tube Boilers	4	
23.33.11.15.13	High Temperature Hot Water Fire Tube Boilers	4	
23.33.11.15.15	Low Pressure Steam Fire Tube Boilers	4	
23.33.11.15.17	Low Temperature Hot Water Fire Tube Boilers	4	
23.33.11.17	Flexible Tube Boilers	3	
23.33.11.17.11	High Pressure Steam Flexible Tube Boilers	4	
23.33.11.17.13	High Temperature Hot Water Flexible Tube Boilers	4	
23.33.11.17.15	Low Pressure Steam Flexible Tube Boilers	4	
23.33.11.17.17	Low Temperature Hot Water Flexible Tube Boilers	4	
23.33.11.19	Sectionalized Cast Iron Boilers	3	
23.33.11.19.11	Low Pressure Steam Sectionalized Cast Iron Boilers	4	
23.33.11.19.13	Low Temperature Hot Water Sectionalized Cast Iron Boilers	4	
23.33.11.21	Water Tube Boilers	3	
23.33.11.21.11	High Pressure Steam Water Tube Boilers	4	
23.33.11.21.13	High Temperature Hot Water Water Tube Boilers	4	
23.33.11.21.15	Low Pressure Steam Water Tube Boilers	4	
23.33.11.21.17	Low Temperature Hot Water Water Tube Boilers	4	
23.33.11.22	Electric Boilers	3	
23.33.11.23	Boiler Components?	3	
23.33.11.23.11	Boiler Joint Fillers and Sealants	4	
23.33.11.23.13	Boiler Fuel Burners	4	
23.33.11.23.15	Boiler Fuel Oil Filters	4	
23.33.11.23.17	Boiler Nozzles	4	
23.33.11.23.19	Boiler Induction Blowers	4	
23.33.11.23.21	Boiler Fuel Gas Heat Recovery Devices	4	
23.33.11.23.23	Boiler Draft Fans	4	
23.33.13.00	Furnaces	2	
23.33.13.11	Furnace Controls	3	
23.33.13.11.11	Furnace Control Panels	4	
23.33.13.11.13	Furnace Burner Controls	4	
23.33.13.13	Coal Fired Furnaces	3	
23.33.13.15	Electric Resistance Furnaces	3	
23.33.13.17	Natural Gas Fired Furnaces	3	
23.33.13.19	Gasoline Fired Furnaces	3	
23.33.13.21	Fuel Oil Fired Furnaces	3	
23.33.13.23	Oil Fired Furnaces	3	
23.33.13.25	Propane Fired Furnaces	3	
23.33.13.27	Furnace Components	3	
23.33.13.27.11	Furnace Joint Fillers and Sealants	4	
23.33.13.27.13	Furnace Fuel Burners	4	
23.33.13.27.15	Furnace Fuel Oil Filters	4	
23.33.13.27.17	Furnace Nozzles	4	
23.33.13.27.19	Furnace Fuel Gas Heat Recovery Devices	4	
23.33.15.00	HVAC Heating Units	2	
23.33.15.11	Propane HVAC Heaters	3	
23.33.15.11.11	Indoor Propane HVAC Heaters	4	
23.33.15.11.13	Outdoor Propane HVAC Heaters	4	
23.33.15.13	Heating Stoves	3	
23.33.15.13.11	Cast Iron Heating Stoves	4	
23.33.15.13.13	Stone Heating Stoves	4	
23.33.15.13.15	Welded Steel Heating Stoves	4	
23.33.15.13.17	Heating Stove Components?	4	
23.33.15.13.17.11	Heating Stove Fenders	5	
23.33.15.13.17.13	Heating Stove Hoods	5	
23.33.15.13.17.15	Heating Stove Pipes	5	
23.33.15.15	Specialized Surface Heating Products	3	
23.33.15.15.11	Heating Sheets	4	
23.33.15.15.11.11	Heating Sheets for Walls	5	
23.33.15.15.11.13	Heating Sheets for Ceilings	5	
23.33.15.15.11.15	Embedded Electric Heating Sheets	5	
23.33.15.15.11.17	Heating Sheets for Glazing	5	
23.33.15.15.13	Heating Cables	4	
23.33.15.15.15	Pipe Heat Tape	4	
23.33.15.15.17	Cable Heat Trace	4	
23.33.15.15.19	Heated Ceiling Panels	4	
23.33.15.15.21	Pipe Heat Tracing	4	
23.33.15.17	Fuel Fired HVAC Heaters	3	
23.33.15.17.11	Fuel Fired HVAC Duct Heaters	4	
23.33.15.17.13	Fuel Fired HVAC Radiant Heaters	4	
23.33.15.17.15	Fuel Fired HVAC Unit Heaters	4	
23.33.15.17.17	Fuel Fired HVAC Air Heaters	4	
23.33.15.19	Forced Air Fuel Fired HVAC Heaters	3	
23.33.15.19.11	Forced Air Fuel Fired HVAC Duct Heaters	4	
23.33.15.19.13	Forced Air Fuel Fired HVAC Radiant Heaters	4	
23.33.15.19.15	Forced Air Fuel Fired HVAC Unit Heaters	4	
23.33.15.19.17	Forced Air Fuel Fired HVAC Air Heaters	4	
23.33.15.21	Hydronic HVAC Heaters	3	
23.33.15.21.11	Cast Iron Radiators	4	
23.33.15.21.13	Finned Tube Radiators	4	
23.33.15.21.15	Plate Radiators	4	
23.33.15.21.17	Radiation Heating Panels	4	
23.33.15.23	Forced Air Hydronic HVAC Heaters	3	
23.33.15.23.11	Forced Air Cast Iron Radiators	4	
23.33.15.23.13	Forced Air Finned Tube Radiators	4	
23.33.15.23.15	Forced Air Plate Radiators	4	
23.33.15.23.17	Forced Air Radiation Heating Panels	4	
23.33.15.25	Electric HVAC Heaters	3	
23.33.15.25.11	Halogen Electric HVAC Heaters	4	
23.33.15.25.13	Infrared Plate HVAC Heaters	4	
23.33.15.25.15	Ultraviolet HVAC Heaters	4	
23.33.15.25.17	Electric HVAC Resitive Unit Heaters	4	
23.33.15.27	Forced Air Electric HVAC Heaters	3	
23.33.15.27.11	Forced Air Halogen Electric HVAC Heaters	4	
23.33.15.27.13	Forced Air Infrared Plate HVAC Heaters	4	
23.33.15.27.15	Forced Air Ultraviolet HVAC Heaters	4	
23.33.15.27.17	Forced Air Electric HVAC Resitive Unit Heaters	4	
23.33.15.29	HVAC Steam Hot Water Converters	3	
23.33.17.00	Heat Pumps	2	
23.33.17.11	Packaged Heat Pumps	3	
23.33.17.11.11	Air Source Packaged Heat Pumps	4	
23.33.17.11.13	Water Source Packaged Heat Pumps	4	
23.33.17.13	Split System Heat Pumps	3	
23.33.17.13.11	Air Source Split System Heat Pumps	4	
23.33.17.13.13	Water Source Split System Heat Pumps	4	
23.33.19.00	Cooling and Freeze Components	2	
23.33.19.11	Cooling Freeze Plant Accessories	3	
23.33.19.11.11	Refrigerant Liquid	4	
23.33.21.00	Chillers	2	
23.33.21.11	Absorption Chillers	3	
23.33.21.11.11	Direct Fired Absorption Chillers	4	
23.33.21.11.13	Steam Absorption Chillers	4	
23.33.21.13	Chillers	3	
23.33.21.13.11	Central Package Unit Chillers	4	
23.33.21.13.13	Centrifugal Chillers	4	
23.33.21.13.13.11	Packaged Centrifugal Chillers	5	
23.33.21.13.13.13	Split System Centrifugal Chillers	5	
23.33.21.13.15	Reciprocating Chillers	4	
23.33.21.13.15.11	Packaged Reciprocating Chillers	5	
23.33.21.13.15.13	Split System Reciprocating Chillers	5	
23.33.21.13.17	Rotary Chillers	4	
23.33.21.13.17.11	Packaged Rotary Chillers	5	
23.33.21.13.17.13	Split System Rotary Chillers	5	
23.33.21.13.19	Rotary Screw Chillers	4	
23.33.21.13.19.11	Packaged Rotary Screw Chillers	5	
23.33.21.13.19.13	Split System Rotary Screw Chillers	5	
23.33.21.13.21	Screw Chillers	4	
23.33.21.13.21.11	Packaged Screw Chillers	5	
23.33.21.13.21.13	Split System Screw Chillers	5	
23.33.21.13.23	Scroll Chillers	4	
23.33.21.13.23.11	Packaged Scroll Chillers	5	
23.33.21.13.23.13	Split System Scroll Chillers	5	
23.33.23.00	Cooling Towers	2	
23.33.23.11	Mechanical Draft Cooling Towers	3	
23.33.23.13	Natural Draft Cooling Towers	3	
23.33.23.15	Cooling Ponds	3	
23.33.25.00	Air Handling Units	2	
23.33.25.11	Built Up Air Handling Units	3	
23.33.25.11.11	Built Up Indoor Air Handling Units	4	
23.33.25.11.13	Built Up Rooftop Air Handling Units	4	
23.33.25.13	Customized Air Handling Units	3	
23.33.25.13.11	Customized Indoor Air Handling Units	4	
23.33.25.13.13	Customized Rooftop Air Handling Units	4	
23.33.25.15	Heating and Ventilating Units	3	
23.33.25.17	Modular Air Handling Units	3	
23.33.25.17.11	Modular Indoor Air Handling Units	4	
23.33.25.17.13	Modular Rooftop Air Handling Units	4	
23.33.25.19	Pre Fabricated Air Handling Units	3	
23.33.27.00	Air Humidity Control Equipment	2	
23.33.27.11	Air Washers	3	
23.33.27.11.11	Convection Air Washers	4	
23.33.27.11.13	Evaporative Air Washers	4	
23.33.27.13	Dehumidifiers	3	
23.33.27.13.11	Dehumidifiers	4	
23.33.27.13.11.11	Swimming Pool Dehumidification Units	5	
23.33.27.13.13	Permanently Installed Dehumidifiers	4	
23.33.27.13.15	Portable Dehumidifiers	4	
23.33.27.15	Air Humidifiers	3	
23.33.27.17	Vaporizers	3	
23.33.29.00	HVAC Dampers	2	
23.33.29.11	3 Way Diverter Dampers	3	
23.33.29.13	Backdraft Dampers	3	
23.33.29.13.11	Opposed Blade Backdraft Dampers	4	
23.33.29.13.11.11	Spring Loaded Opposed Blade Backdraft Dampers	5	
23.33.29.13.11.13	Counter Weight Balanced Opposed Blade Backdraft Dampers	5	
23.33.29.13.13	Parallel Backdraft Dampers	4	
23.33.29.13.13.11	Spring Loaded Parallel Backdraft Dampers	5	
23.33.29.13.13.13	Counter Weight Balanced Parallel Backdraft Dampers	5	
23.33.29.15	Bi Plane Dampers	3	
23.33.29.17	Butterfly Dampers	3	
23.33.29.17.11	Automatically Control Butterfly Dampers	4	
23.33.29.17.13	Manual Butterfly Dampers	4	
23.33.29.19	Dampers	3	
23.33.29.19.11	Automatically Control Dampers	4	
23.33.29.19.13	Manual Dampers	4	
23.33.29.21	Diffuser Firestop Flaps	3	
23.33.29.23	Fire Dampers	3	
23.33.29.23.11	Manual Fire Dampers	4	
23.33.29.23.13	Automatic Fire Dampers	4	
23.33.29.25	Smoke Dampers	3	
23.33.29.25.11	Manual Smoke Dampers	4	
23.33.29.25.13	Automatic Smoke Dampers	4	
23.33.29.27	Non Return Dampers	3	
23.33.29.29	Guillotine Dampers	3	
23.33.29.31	Louvre Dampers	3	
23.33.29.31.11	Louvre Dampers with Opposed Blade Motion	4	
23.33.29.33	Movable Blade Wall Louvers	3	
23.33.29.33.11	Double Panel Wall Louvers	4	
23.33.29.35	Static Pressure Regulating Dampers	3	
23.33.29.37	Volume Control Dampers	3	
23.33.29.37.11	Opposed Blade Volume Control Dampers	4	
23.33.29.37.11.11	Manual Opposed Blade Volume Control Dampers	5	
23.33.29.37.11.13	Automatic Opposed Blade Volume Control Dampers	5	
23.33.29.37.13	Parallel Volume Control Dampers	4	
23.33.29.37.13.11	Manual Parallel Volume Control Dampers	5	
23.33.29.37.13.13	Automatic Parallel Volume Control Dampers	5	
23.33.29.39	Fire Shutters for Air Ductwork	3	
23.33.31.00	Air Circulators	2	
23.33.31.11	Air Curtains	3	
23.33.31.11.11	Heated Air Curtains	4	
23.33.31.11.13	Non Heated Air Curtains	4	
23.33.31.13	Blowers	3	
23.33.31.13.11	Permanently Installed Blowers	4	
23.33.31.13.13	Portable Blowers	4	
23.33.31.15	Exhaust Hoods	3	
23.33.31.15.11	Canopy Exhaust Hoods	4	
23.33.31.15.13	Chemical Fume Hoods	4	
23.33.31.15.15	Perchloric Acid Fume Hoods	4	
23.33.31.15.17	Radio Isotope Fume Hoods	4	
23.33.31.15.19	Snorkel Exhaust Hoods	4	
23.33.31.15.21	Grease Exhaust Hoods	4	
23.33.31.17	Exhaust Hood Fire Suppression System	3	
23.33.31.17.11	Chemical Exhaust Hood Fire Suppression Systems	4	
23.33.31.17.13	Gas Exhaust Hood Fire Suppression Systems	4	
23.33.31.19	Fans	3	
23.33.31.19.11	Axial Fans	4	
23.33.31.19.11.11	Axial Plug Fans	5	
23.33.31.19.11.13	Axial Vane Fans	5	
23.33.31.19.11.15	Ceiling Fans	5	
23.33.31.19.11.17	Propeller Fans	5	
23.33.31.19.11.19	Tube Axial Fans	5	
23.33.31.19.11.21	Variable Pitch Axial Vane Fans	5	
23.33.31.19.13	Centrifugal Fans	4	
23.33.31.19.13.11	Centrifugal Plug Fans	5	
23.33.31.19.13.13	Double Inlet Centrifugal Fans	5	
23.33.31.19.13.15	Single Inlet Centrifugal Fans	5	
23.33.31.21	Power Ventilators	3	
23.33.31.21.11	Centrifugal Power Ventilators	4	
23.33.31.21.11.11	Down Blast Centrifugal Power Ventilators	5	
23.33.31.21.11.13	Up Blast Centrifugal Power Ventilators	5	
23.33.31.21.13	Propeller Power Ventilators	4	
23.33.31.21.13.11	Down Blast Propeller Power Ventilators	5	
23.33.31.21.13.13	Up Blast Propeller Power Ventilators	5	
23.33.33.00	HVAC Fan Coil Units	2	
23.33.33.11	Fan Coil Units	3	
23.33.33.11.11	Fan Coil Cooling Units	4	
23.33.33.11.11.11	2 Pipe Fan Coil Cooling Units	5	
23.33.33.11.11.13	4 Pipe Fan Coil Cooling Units	5	
23.33.33.11.13	Fan Coil Heating Units	4	
23.33.33.11.13.11	4 Pipe Fan Coil Heating Units	5	
23.33.33.11.13.13	2 Pipe Fan Coil Heating Units	5	
23.33.33.11.15	Fan Coil Heating and Cooling Units	4	
23.33.33.11.15.11	2 Pipe Fan Coil Heating and Cooling Units	5	
23.33.33.11.15.13	4 Pipe Fan Coil Heating and Cooling Units	5	
23.33.35.00	HVAC Coils	2	
23.33.35.11	HVAC Coils	3	
23.33.35.11.11	HVAC Glycol Coils	4	
23.33.35.11.13	HVAC Steam Coils	4	
23.33.35.11.15	HVAC Water Coils	4	
23.33.37.00	Refrigerant Condensing Units	2	
23.33.37.11	Packaged Refrigerant Coils and Fan Units	3	
23.33.37.13	Refrigerant Condensing Coils	3	
23.33.37.15	Refrigerant Evaporators	3	
23.33.39.00	Air Conditioning Equipment	2	
23.33.39.11	Air Conditioners	3	
23.33.39.11.11	Room Air Conditioners	4	
23.33.39.13	High Pressure Air Conditioning Units	3	
23.33.39.15	Make Up Air Units	3	
23.33.39.15.11	Make Up Air Units With Heat	4	
23.33.39.15.13	Make Up Air Units Without Heat	4	
23.33.39.17	Packaged Air Conditioners	3	
23.33.39.17.11	Dual Pack Packaged Air Conditioners	4	
23.33.39.17.11.11	Air Cooled Dual Pack Packaged Air Conditioners	5	
23.33.39.17.11.13	Water Cooled Dual Pack Packaged Air Conditioners	5	
23.33.39.17.13	Single Pack Packaged Air Conditioners	4	
23.33.39.17.13.11	Air Cooled Single Pack Packaged Air Conditioners	5	
23.33.39.17.13.13	Water Cooled Single Pack Packaged Air Conditioners	5	
23.33.39.17.13.15	Unitary Air Conditioning Equipment	5	
23.33.39.19	Packaged Terminal Air Conditioning Units	3	
23.33.39.19.11	Fixed Packaged Terminal Air Conditioners	4	
23.33.39.19.11.11	Air Cooled Fixed Packaged Terminal Air Conditioners	5	
23.33.39.19.11.13	Water Cooled Fixed Packaged Terminal Air Conditioners	5	
23.33.39.19.13	Portable Packaged Terminal Air Conditioners	4	
23.33.39.19.13.11	Air Cooled Portable Packaged Terminal Air Conditioners	5	
23.33.39.19.13.13	Water Cooled Portable Packaged Terminal Air Conditioners	5	
23.33.39.19.15	Window Packaged Terminal Air Conditioners	4	
23.33.39.19.15.11	Air Cooled Window Packaged Terminal Air Conditioners	5	
23.33.39.19.15.13	Water Cooled Window Packaged Terminal Air Conditioners	5	
23.33.39.21	Split System Air Conditioning Units	3	
23.33.41.00	HVAC Air Terminals	2	
23.33.41.11	Fan Powered Terminal Air Units	3	
23.33.41.11.11	Mixing Fan Powered Terminal Air Units	4	
23.33.41.11.11.11	Single Duct Mixing Fan Powered Terminal Air Units	5	
23.33.41.11.11.13	Dual Duct Mixing Fan Powered Terminal Air Units	5	
23.33.41.11.13	Non Mixing Fan Powered Terminal Air Units	4	
23.33.41.11.13.11	Single Duct Mixing Fan Powered Terminal Air Units	5	
23.33.41.11.13.13	Dual Duct Mixing Fan Powered Terminal Air Units	5	
23.33.41.13	Induction Terminal Air Units	3	
23.33.41.13.11	Constant Volume Air Induction Terminal Air Units	4	
23.33.41.13.11.11	Single Duct Constant Volume Air Induction Terminal Air Units	5	
23.33.41.13.11.13	Dual Duct Constant Volume Air Induction Terminal Air Units	5	
23.33.41.13.13	Variable Air Volume Induction Terminal Air Units	4	
23.33.41.13.13.11	Single Duct Variable Air Volume Induction Terminal Air Units	5	
23.33.41.13.13.13	Dual Duct Variable Air Volume Induction Terminal Air Units	5	
23.33.41.15	HVAC Mixing Boxes	3	
23.33.41.17	Terminal Air Units	3	
23.33.41.17.11	Constant Volume Air Terminal Units	4	
23.33.41.17.11.11	Dual Duct Constant Volume Air Terminal Units	5	
23.33.41.17.11.13	Single Duct Constant Volume Air Terminal Units	5	
23.33.41.17.13	Variable Air Volume Terminal Units	4	
23.33.41.17.13.11	Dual Duct Variable Air Volume Terminal Units	5	
23.33.41.17.13.13	Single Duct Variable Air Volume Terminal Units	5	
23.33.41.19	Exhaust Terminals	3	
23.33.43.00	HVAC Condenser Units	2	
23.33.43.11	Air Cooled Condenser Units	3	
23.33.43.11.11	Indoor Air Cooled Condenser Units	4	
23.33.43.11.13	Outdoor Air Cooled Condenser Units	4	
23.33.43.13	Evaporative Condenser Units	3	
23.33.43.15	Refrigeration Condenser Units	3	
23.33.43.15.11	Air Cooled Refrigeration Condenser Units	4	
23.33.43.15.13	Water Cooled Refrigeration Condenser Units	4	
23.33.43.17	Water Cooled Condenser Units	3	
23.33.43.17.11	Indoor Water Cooled Condenser Units	4	
23.33.45.00	HVAC Coolers	2	
23.33.45.11	HVAC Dry Coolers	3	
23.33.45.13	HVAC Evaporative Coolers	3	
23.33.47.00	Air Dryers	2	
23.33.47.11	Refrigerated Air Dryers	3	
23.33.47.13	Regenerative Desiccant Air Dryers	3	
23.33.49.00	HVAC Ductwork	2	
23.33.49.11	Ventilation Diffusers	3	
23.33.49.11.11	Ceiling Ventilation Diffusers	4	
23.33.49.11.11.11	Ceiling Linear Ventilation Diffusers	5	
23.33.49.11.13	Wall Ventilation Diffusers	4	
23.33.49.11.15	Floor Ventilation Diffusers	4	
23.33.49.13	Ventilation Ducts	3	
23.33.49.13.11	Round Ventilation Ducts	4	
23.33.49.13.11.11	Flexible Ventilation Ducts	5	
23.33.49.13.13	Square Ventilation Ducts	4	
23.33.49.15	Duct Access Panels	3	
23.33.49.17	Duct Insulation	3	
23.33.49.17.11	Duct Covering Insulation	4	
23.33.49.17.13	Duct Liner Insulation	4	
23.33.49.19	Ductwork Distribution Collectors	3	
23.33.49.21	Ductwork Expansion Vessels	3	
23.33.49.21.11	Air Outlets and Inlets	4	
23.33.49.21.13	Ductwork Guide Vanes	4	
23.33.49.21.15	Ductwork Air Mixers	4	
23.33.49.21.17	Ductwork Sound Attenuators	4	
23.33.49.23	Grilles	3	
23.33.49.23.11	Exhaust Air Grilles	4	
23.33.49.23.13	Return Air Grilles	4	
23.33.49.23.15	Supply Air Grilles	4	
23.33.49.23.17	Transfer Air Grilles	4	
23.33.49.25	Ventilation Registers	3	
23.33.49.25.11	Exhaust Air Ventilation Registers	4	
23.33.49.25.13	Return Air Ventilation Registers	4	
23.33.49.25.15	Supply Air Ventilation Registers	4	
23.33.49.27	Ventilators	3	
23.33.49.27.11	Gravity Ventilators	4	
23.33.49.27.13	Intake and Relief Ventilators	4	
23.33.49.27.15	Relief Ventilators	4	
23.33.49.27.17	Intake Ventilators	4	
23.33.49.29	Air Ductwork Accessories	3	
23.33.49.29.11	Access Fittings for Air Ductwork	4	
23.33.49.29.13	Couplings for Air Ductwork	4	
23.33.49.29.15	Hangers for Air Ductwork	4	
23.33.49.29.17	Supports for Air Ductwork	4	
23.33.49.29.19	Mechanical Fasteners for Air Ductwork	4	
23.33.51.00	HVAC Specialized Equipment	2	
23.33.51.11	Refrigerant Monitors	3	
23.33.51.13	Refrigerant Purge Units	3	
23.33.51.15	Ultraviolet Disinfection Lighting	3	
23.33.53.00	Solar Water Heating Equipment	2	
23.33.53.11	Solar Water Heating Packaged Units	3	
23.33.53.13	Solar Water Heating Collector Components?	3	
23.33.53.13.11	Solar Water Heating Absorber Plates	4	
23.33.53.13.13	Solar Water Heating Absorber Tubing	4	
23.33.53.13.15	Solar Water Heating Coatings and Surface Treatment	4	
23.33.53.13.17	Solar Water Heating Collector Insulation	4	
23.33.53.13.19	Solar Water Heating Glazing	4	
23.33.53.13.21	Solar Water Heating Housing and Framing	4	
23.33.53.13.23	Solar Water Heating Reflectors	4	
23.33.53.15	Solar Water Heating Collector Units	3	
23.33.53.15.11	Solar Water Heating Flat Plate Collectors	4	
23.33.53.15.13	Solar Water Heating Concentrating Collectors	4	
23.33.53.15.15	Solar Water Heating Vacuum Tube Collectors	4	
23.33.55.00	Energy HVAC Recovery Equipment	2	
23.33.55.11	Heat Pipes	3	
23.33.55.13	Heat Wheels	3	
23.35.00.00	Electrical and Lighting Specific Products and Equipment	1	
23.35.11.00	Electrical Generators	2	
23.35.11.11	Single Unit Electrical Generators	3	
23.35.11.11.11	Engine Electrical Generators	4	
23.35.11.11.13	Motor Electrical Generators	4	
23.35.11.12	Single Unit Electrical Generator Engines	3	
23.35.11.12.11	Electrical Generation Diesel Engines	4	
23.35.11.12.13	Electrical Generation Gas Engines	4	
23.35.11.12.15	Electrical Generation Natural Gas Engines	4	
23.35.11.12.15.11	Electrical Generation Natural Gas Turbines	5	
23.35.11.12.17	Electrical Generation Steam Turbines	4	
23.35.11.13	Motor Generator Sets	3	
23.35.11.13.11	Alternating Current Frequency Converters	4	
23.35.11.13.13	Alternating Current Generator Sets	4	
23.35.11.13.15	Direct Current Generator Sets	4	
23.35.11.13.17	Multiple Frequency Electrical Generator Sets	4	
23.35.11.13.19	Multiple Voltage Electrical Generator Sets	4	
23.35.11.15	Engine Generator Sets	3	
23.35.11.15.11	Diesel Generator Sets	4	
23.35.11.15.13	Gas Generator Sets	4	
23.35.11.15.15	Natural Gas Generator Sets	4	
23.35.11.15.17	Steam Turbine Generator Sets	4	
23.35.11.15.19	Thermal Generator Sets	4	
23.35.11.15.21	Hydro Turbine Generator Sets	4	
23.35.11.15.23	Wind Generator Sets	4	
23.35.11.17	Photovoltaic Generators	3	
23.35.11.17.11	Photoelectric Cell	4	
23.35.11.17.12	Photoelectric Panel	4	
23.35.11.17.13	Photovoltaic Array	4	
23.35.11.17.15	Photovoltaic Collectors	4	
23.35.13.00	Transformers	2	
23.35.13.11	Current Transformers	3	
23.35.13.13	Instrument Transformers	3	
23.35.13.13.11	Current Instrument Transformers	4	
23.35.13.13.13	Pulse Instrument Transformers	4	
23.35.13.13.15	Voltage Instrument Transformers	4	
23.35.13.15	Electrical Network Transformers	3	
23.35.13.15.11	Electrical Network Isolation Transformers	4	
23.35.13.15.11.11	Electrical Network Dry Isolation Transformers	5	
23.35.13.15.11.13	Electrical Network Oil Filled Isolation Transformers	5	
23.35.13.15.13	Electrical Network Step Down Transformers	4	
23.35.13.15.13.11	Electrical Network Dry Step Down Transformers	5	
23.35.13.15.13.13	Electrical Network Oil Filled Step Down Transformers	5	
23.35.13.15.15	Electrical Network Step Up Transformers	4	
23.35.13.15.15.11	Electrical Network Dry Step Up Transformers	5	
23.35.13.15.15.13	Electrical Network Oil Filled Step Up Transformers	5	
23.35.13.17	Power Transformers	3	
23.35.13.17.11	Power Harmonic Mitigation Transformers	4	
23.35.13.17.11.11	Power Dry Harmonic Mitigation Transformers	5	
23.35.13.17.11.13	Power Oil Filled Harmonic Mitigation Transformers	5	
23.35.13.17.13	Power Isolation Transformers	4	
23.35.13.17.13.11	Power Dry Isolation Transformers	5	
23.35.13.17.13.13	Power Oil Filled Isolation Transformers	5	
23.35.13.17.15	Power Step Down Transformers	4	
23.35.13.17.15.11	Power Dry Step Down Transformers	5	
23.35.13.17.15.13	Power Oil Filled Step Down Transformers	5	
23.35.13.17.17	Power Step Up Transformers	4	
23.35.13.17.17.11	Power Dry Step Up Transformers	5	
23.35.13.17.17.13	Power Oil Filled Step Up Transformers	5	
23.35.13.19	Transformer Accessories	3	
23.35.13.19.11	Transformer Commutators	4	
23.35.13.19.13	Transformer Ballasts	4	
23.35.15.00	Electric Motors	2	
23.35.15.11	Alternating Current (AC) Motors	3	
23.35.15.11.11	Single Phase AC Motors	4	
23.35.15.11.11.11	Multi Speed Single Phase AC Motors	5	
23.35.15.11.11.13	Single Speed Single Phase AC Motors	5	
23.35.15.11.11.15	Synchronous Single Phase AC Motors	5	
23.35.15.11.13	Three Phase AC Motors	4	
23.35.15.11.13.11	Multi Speed Three Phase AC Motors	5	
23.35.15.11.13.13	Single Speed Three Phase AC Motors	5	
23.35.15.11.13.15	Synchronous Three Phase AC Motors	5	
23.35.15.13	Direct Current (DC) Motors	3	
23.35.15.13.11	Brushless DC Motors	4	
23.35.15.13.13	Compound Wound DC Motors	4	
23.35.15.13.15	Coreless DC Motors	4	
23.35.15.13.17	Limited Angle Torque DC Motors	4	
23.35.15.13.19	Linear DC Motors	4	
23.35.15.13.21	Permanent Magnetic DC Motors	4	
23.35.15.13.23	Series Wound DC Motors	4	
23.35.15.13.25	Shunt Wound DC Motors	4	
23.35.15.13.27	Step DC Motors	4	
23.35.15.15	DC Servo Motors	3	
23.35.15.17	Dynamotors	3	
23.35.15.19	Hydraulic Driven Motors	3	
23.35.15.21	Pneumatic Driven Motors	3	
23.35.15.23	Steam Driven Motors	3	
23.35.17.00	Variable Speed Drives	2	
23.35.17.11	Direct Current Electronic Speed Controller Drives	3	
23.35.17.13	Slip Controlled Drives	3	
23.35.17.15	Variable Frequency Drives	3	
23.35.17.15.11	Pulse Width Variable Frequency Drives	4	
23.35.17.15.13	Current Source Input Variable Frequency Drives	4	
23.35.17.15.15	Variable Voltage Input Variable Frequency Drives	4	
23.35.19.00	Batteries	2	
23.35.19.11	Battery Racks	3	
23.35.19.13	Non Rechargeable Batteries	3	
23.35.19.13.11	Alkaline Batteries	4	
23.35.19.13.13	Dry Cell Batteries	4	
23.35.19.13.15	Lithium Batteries	4	
23.35.19.13.17	Silver Oxide Batteries	4	
23.35.19.13.19	Zinc Air Batteries	4	
23.35.19.13.21	Zinc Coal Batteries	4	
23.35.19.15	Rechargeable Batteries	3	
23.35.19.15.11	Alkaline Batteries	4	
23.35.19.15.13	Lead Acid Batteries	4	
23.35.19.15.13.11	Sealed Lead Acid Batteries	5	
23.35.19.15.13.13	Wet Cell Lead Acid Batteries	5	
23.35.19.15.15	Lithium Batteries	4	
23.35.19.15.17	Manganese Batteries	4	
23.35.19.15.19	Mercuric Oxide Batteries	4	
23.35.19.15.21	Nickel Cadmium Batteries	4	
23.35.19.15.23	Nickel Hydrogen Batteries	4	
23.35.19.15.25	Nickel Iron Batteries	4	
23.35.19.15.27	Nickel Metal Hydride Batteries	4	
23.35.19.15.29	Nickel Sodium Chloride Batteries	4	
23.35.19.15.31	Silver Oxide Batteries 	4	
23.35.21.00	Battery Chargers	2	
23.35.23.00	Power Conditioning Equipment	2	
23.35.23.11	Harmonic Control Devices	3	
23.35.23.11.11	Electric Interference Suppressor Filters	4	
23.35.23.11.13	Harmonic Filters	4	
23.35.23.13	Power Converters	3	
23.35.23.13.11	Rotary Converters	4	
23.35.23.15	Static Power Converters	3	
23.35.23.15.11	Static Rectifiers	4	
23.35.23.15.13	Ondulators	4	
23.35.23.15.15	Combined Converter Sets	4	
23.35.23.15.17	Direct Current (DC) Drive Controllers	4	
23.35.23.15.19	Slip Controllers	4	
23.35.23.15.21	Static Frequency Converters	4	
23.35.23.15.23	Static Uninterruptible Power Supplies	4	
23.35.23.15.25	Variable Frequency Controllers	4	
23.35.23.15.27	Frequency Changers	4	
23.35.23.15.29	Rotary Uninterruptible Power Units	4	
23.35.23.17	Power Inverters	3	
23.35.23.17.11	Commutator Inverters	4	
23.35.23.17.13	Solid State Inverters	4	
23.35.23.19	Powerfactor Correction Devices	3	
23.35.23.19.11	Capacitive and Inductive Power Correction Devices	4	
23.35.23.19.13	Capacitive Power Correction Devices	4	
23.35.23.19.15	Inductive Power Correction Devices	4	
23.35.23.19.17	Capacitors	4	
23.35.23.19.19	Power Factor Controls (Cosines Phi)	4	
23.35.23.21	Uninterrupted Power Supply (UPS) Units	3	
23.35.23.21.11	Uninterruptible Power Supply Component Systems	4	
23.35.23.21.13	Uninterruptible Power Supply Packaged Units	4	
23.35.25.00	Electrical Instrumentation and Controls	2	
23.35.25.11	Electrical Meters	3	
23.35.25.11.11	Power Meters	4	
23.35.25.11.13	Voltage Meters	4	
23.35.25.11.15	Resistance Meters	4	
23.35.25.11.17	Frequency Meters	4	
23.35.25.11.19	Multi Meters	4	
23.35.25.11.21	Current Meters	4	
23.35.25.11.23	Amp Hour Meters	4	
23.35.25.11.25	Power Factor Meters	4	
23.35.25.11.27	Kilowatt Hour Meters	4	
23.35.25.11.27.11	Electromechanical Remote Kilowatt Hour Meters	5	
23.35.25.11.27.13	Electromechancial Kilowatt Hour Meters	5	
23.35.25.11.27.15	Solid State Remote Kilowatt Hour Meters	5	
23.35.25.11.27.17	Solid State Kilowatt Hour Meters	5	
23.35.25.11.29	Multiple Tariff Meters	4	
23.35.25.13	Electrical Energy Recording Devices	3	
23.35.25.13.11	Watt Hour Recorders	4	
23.35.25.15	Electrical Network Protection Modules	3	
23.35.25.17	Electrical Power Protection Modules	3	
23.35.25.19	Motor Starters	3	
23.35.25.21	Programmable Logic Controllers	3	
23.35.25.23	Electrical Control Panels	3	
23.35.25.25	Electrical Line Supervisor Sets	3	
23.35.27.00	Electrical Terminals	2	
23.35.27.11	Electrical Receptacles	3	
23.35.27.11.11	Electrical Receptacle Terminal Units	4	
23.35.27.11.13	Ground Fault Receptacles	4	
23.35.27.11.15	Electrical Extension Cords	4	
23.35.27.11.17	Electrical Receptacle Accessories	4	
23.35.27.11.17.11	Electrical Telltale Lamps	5	
23.35.27.11.17.13	Electrical Receptacle Protectors	5	
23.35.27.11.17.15	Electrical Receptacle Adapters	5	
23.35.27.13	Electrical Plug Connectors	3	
23.35.29.00	Circuit Breakers	2	
23.35.29.11	Air Circuit Breakers	3	
23.35.29.11.11	Network Distribution Air Circuit Breakers	4	
23.35.29.11.13	Power Distribution Air Circuit Breakers	4	
23.35.29.13	Gas Circuit Breakers	3	
23.35.29.13.11	Network Distribution Gas Circuit Breakers	4	
23.35.29.13.13	Power Distribution Gas Circuit Breakers	4	
23.35.29.15	Ground Fault Circuit Breakers	3	
23.35.29.17	Molded Case Circuit Breakers	3	
23.35.29.17.11	Shunt Molded Case Circuit Breakers	4	
23.35.29.19	Oil Circuit Breakers	3	
23.35.29.19.11	Network Distribution Oil Circuit Breakers	4	
23.35.29.19.13	Power Distribution Oil Circuit Breakers	4	
23.35.29.21	Vacuum Circuit Breakers	3	
23.35.29.21.11	Network Distribution Vacuum Circuit Breakers	4	
23.35.29.21.13	Power Distribution Vacuum Circuit Breakers	4	
23.35.29.23	Ground Fault Circuit Interrupters	3	
23.35.29.25	Network Protectors	3	
23.35.29.27	Electrical Disconnects	3	
23.35.29.27.11	Air Disconnects	4	
23.35.29.27.13	Vacuum Disconnects	4	
23.35.29.27.15	Gas Disconnects	4	
23.35.29.29	Fuses	3	
23.35.29.29.11	Fuse Panels	4	
23.35.29.29.13	Fuse Holders	4	
23.35.31.00	Electrical Power Distribution Devices	2	
23.35.31.11	Power Supply Devices	3	
23.35.31.13	Distribution Panel Boards	3	
23.35.31.15	Electrical Distribution Control Panels	3	
23.35.31.17	Electrical Panel Boards	3	
23.35.31.19	Electrical Panel Meter Sockets	3	
23.35.31.21	Load Centers	3	
23.35.31.23	Motor Control Centers	3	
23.35.31.25	Power Control and Monitoring Assemblies	3	
23.35.31.27	Power Distribution Units	3	
23.35.31.27.11	Multiple Section Power Distribution Units	4	
23.35.31.27.13	Stand Alone Power Distribution Units	4	
23.35.31.29	Switchboards	3	
23.35.31.29.11	Distribution Switchboards	4	
23.35.31.29.13	Paralleling Switchboards	4	
23.35.31.31	Switchgear	3	
23.35.31.31.11	Distribution Switchgear	4	
23.35.31.31.11.11	Electronic Controlled Distribution Switchgear	5	
23.35.31.31.11.13	Mechanically Controlled Distribution Switchgear	5	
23.35.31.31.11.15	Remote Controlled Distribution Switchgear	5	
23.35.31.31.11.17	Time Controlled Distribution Switchgear	5	
23.35.31.31.13	Paralleling Switchgear	4	
23.35.31.31.13.11	Electronic Controlled Paralleling Switchgear	5	
23.35.31.31.13.13	Mechanically Controlled Paralleling Switchgear	5	
23.35.31.31.13.15	Remote Controlled Paralleling Switchgear	5	
23.35.31.31.13.17	Time Controlled Paralleling Switchgear	5	
23.35.31.33	Electrical Busbars	3	
23.35.31.33.11	Aluminum Electrical Busbars	4	
23.35.31.33.13	Copper Electrical Busbars	4	
23.35.31.35	Electrical Feeders	3	
23.35.33.00	Electrical Ducting Wireways Components	2	
23.35.33.11	Electrical Service Penetrations	3	
23.35.33.13	Electrical Conductor Components	3	
23.35.33.13.11	Electrical Conductor Rails	4	
23.35.33.13.13	Electrical Conductor Couplings	4	
23.35.33.13.15	Electrical Conductor Insulation	4	
23.35.33.13.17	Electrical Support Wires	4	
23.35.33.13.19	Conductor Mechanical Fasteners	4	
23.35.33.15	Electrical Junction Boxes	3	
23.35.33.15.11	Electrical Ceiling Junction Boxes	4	
23.35.33.15.13	Electrical Wall Junction Boxes	4	
23.35.33.17	Electrical Conduits	3	
23.35.33.17.11	Electrical Cable Reels	4	
23.35.33.17.13	Mechanical Fasteners for Conduits 	4	
23.35.33.17.15	Mechanical Fasteners for Trunking	4	
23.35.33.19	Electrical Cable Trays	3	
23.35.33.21	Electrical Bus Ducts	3	
23.35.33.21.11	Aluminum Electrical Bus Ducts	4	
23.35.33.21.13	Copper Electrical Bus Ducts	4	
23.35.33.23	Electrical Racks	3	
23.35.33.23.11	Horizontal Electrical Racks	4	
23.35.33.23.13	Vertical Electrical Racks	4	
23.35.33.25	Electrical Wireways 	3	
23.35.33.25.11	Underfloor Electrical Wireways	4	
23.35.33.25.13	Vertical Electrical Wire Raceways	4	
23.35.33.25.15	Horizontal Electrical Wire Raceways	4	
23.35.33.25.17	Ceiling Grid Electrical Systems	4	
23.35.33.25.17.11	Ceiling Grid Electrical Wire Tracks	5	
23.35.33.25.17.13	Ceiling Grid Electrical Wire Track Connectors	5	
23.35.35.00	Electrical Contactors	2	
23.35.37.00	Electrical Switches	2	
23.35.37.11	Automatic Transfer Switches	3	
23.35.37.11.11	Normal Power Seeking Automatic Transfer Switches	4	
23.35.37.11.13	Power Seeking Automatic Transfer Switches	4	
23.35.37.13	Manual Transfer Switches	3	
23.35.37.15	Barrel Switches	3	
23.35.37.15.11	Barrel Key Switches	4	
23.35.37.17	Dimmer Control Switches	3	
23.35.37.17.11	Lighting Dimmer Rheostats	4	
23.35.37.17.12	Ganged Lighting Dimmers	4	
23.35.37.17.13	Dimmers	4	
23.35.37.19	Disconnect Switches	3	
23.35.37.19.11	Fused Disconnect Switches	4	
23.35.37.19.13	Non Fused Disconnect Switches	4	
23.35.37.21	Drum Switches	3	
23.35.37.23	Flow Switches	3	
23.35.37.25	Key Lock Switches	3	
23.35.37.27	Limit Switches	3	
23.35.37.27.11	Level Switches	4	
23.35.37.27.13	Reed Switches	4	
23.35.37.29	Modular Wiring System Switches	3	
23.35.37.31	Photocell Switches	3	
23.35.37.33	Pressure Switches	3	
23.35.37.33.11	Differential Pressure Switches	4	
23.35.37.35	Rocker Switches	3	
23.35.37.35.11	Mercury Switches	4	
23.35.37.37	Time Switches	3	
23.35.37.39	Foot Switches	3	
23.35.37.41	Joysticks	3	
23.35.37.43	Programmable Logic Control Switches	3	
23.35.37.45	Proximity Switches	3	
23.35.37.47	Pull Chain Switches	3	
23.35.37.49	Push Button Switches	3	
23.35.37.51	Radio Frequency Switches	3	
23.35.37.53	Rotary Switches	3	
23.35.37.55	Slide Switches	3	
23.35.37.57	Snap Switches	3	
23.35.37.59	Speed Switches	3	
23.35.37.61	Tamper Switches	3	
23.35.37.63	Temperature Switches	3	
23.35.37.65	Vacuum Switches	3	
23.35.39.00	Electric Power Protection Devices	2	
23.35.39.11	Electrical Grounding Device	3	
23.35.39.13	Earth Connection Electrodes	3	
23.35.39.13.11	Electrical Ground Plates	4	
23.35.39.13.13	Electrical Ground Rods	4	
23.35.39.15	Lightning Protection	3	
23.35.39.15.11	Lightning Arresters	4	
23.35.39.15.13	Lightning Rods	4	
23.35.39.17	Surge Protection Devices	3	
23.35.41.00	Electrical Isolation Equipment	2	
23.35.41.11	Electronic Chokes	3	
23.35.41.13	Signal Converters	3	
23.35.43.00	Electrical Relays	2	
23.35.43.11	Auxiliary Protective Relays	3	
23.35.43.13	Control Relays	3	
23.35.43.15	Current Differential Relays	3	
23.35.43.15.11	Current Differential Solid State Relays	4	
23.35.43.17	General Purpose Relays	3	
23.35.43.19	Ground Fault Relays	3	
23.35.43.19.11	Ground Fault Solid State Relays	4	
23.35.43.21	Load Shedding Relays	3	
23.35.43.23	Lockout Relays	3	
23.35.43.23.11	Automatic Reset Lockout Relays	4	
23.35.43.23.13	Manual Reset Lockout Relays	4	
23.35.43.25	Mercury Relays	3	
23.35.43.27	Over Current Relays	3	
23.35.43.27.11	"Overcurrent Directional, Induction Disc Relays"	4	
23.35.43.27.13	Over Current Induction Disc Relays	4	
23.35.43.27.15	Over Current Thermal Relays	4	
23.35.43.27.17	Over Current Solid State Relays	4	
23.35.43.29	Overload Relays	3	
23.35.43.29.11	Overload Solid State Relays	4	
23.35.43.31	Phase Failure Relays	3	
23.35.43.31.11	Phase Failure Solid State Relays	4	
23.35.43.33	Power Relays	3	
23.35.43.35	Time Relays	3	
23.35.43.35.11	Reverse Current Time Relays	4	
23.35.43.35.11.11	Reverse Current Solid State Time Relays	5	
23.35.43.35.13	Reverse Power Time Relays	4	
23.35.43.35.13.11	Reverse Power Solid State Time Relays	5	
23.35.43.35.15	Power Factor Time Relays	4	
23.35.43.35.15.11	Power Factor Solid State Time Relays	5	
23.35.43.37	Voltage Relays	3	
23.35.43.37.11	Under Voltage Relays	4	
23.35.43.37.11.11	Under Voltage Solid State Relays	5	
23.35.43.37.13	Over Voltage Relays	4	
23.35.43.37.13.11	Over Voltage Solid State Relays	5	
23.35.43.37.15	Over Under Voltage Relays	4	
23.35.43.37.15.11	Over Under Voltage Solid State Relays	5	
23.35.45.00	Non Electrical Lighting 	2	
23.35.45.11	Lanterns	3	
23.35.45.11.11	Alcohol Lanterns	4	
23.35.45.11.13	Butane Lanterns	4	
23.35.45.11.15	Kerosene Lanterns	4	
23.35.45.11.17	Natural Gas Lanterns	4	
23.35.45.11.19	Propane Lanterns	4	
23.35.45.13	Torches	3	
23.35.45.13.11	Alcohol Torches	4	
23.35.45.13.13	Butane Torches	4	
23.35.45.13.15	Kerosene Torches	4	
23.35.45.13.17	Natural Gas Torches	4	
23.35.45.13.19	Propane Torches	4	
23.35.45.15	Lamps	3	
23.35.45.15.11	Alcohol Lamps	4	
23.35.45.15.13	Butane Lamps	4	
23.35.45.15.15	Kerosene Lamps	4	
23.35.45.15.17	Natural Gas Lamps	4	
23.35.45.15.19	Propane Lamps	4	
23.35.45.17	Solar Tubes	3	
23.35.45.19	Strobe Light Fixtures	3	
23.35.47.00	Electrical Lighting	2	
23.35.47.11	Lighting Fixtures	3	
23.35.47.11.11	Non Weather Rated Lighting Fixtures	4	
23.35.47.11.11.11	Non Weather Rated Fluorescent Lighting Fixtures	5	
23.35.47.11.11.13	Non Weather Rated Halogen Lighting Fixtures	5	
23.35.47.11.11.15	Non Weather Rated High Intensity Discharge Lighting Fixtures	5	
23.35.47.11.11.17	Non Weather Rated Incandescent Lighting Fixtures	5	
23.35.47.11.11.19	Non Weather Rated Light Emitting Diode Lighting Fixtures	5	
23.35.47.11.13	Submersible Lighting Fixtures	4	
23.35.47.11.13.11	Submersible Fluorescent Lighting Fixtures	5	
23.35.47.11.13.13	Submersible Halogen Lighting Fixtures	5	
23.35.47.11.13.15	Submersible High Intensity Discharge Lighting Fixtures	5	
23.35.47.11.13.17	Submersible Incandescent Lighting Fixtures	5	
23.35.47.11.13.19	Submersible Light Emitting Diode Lighting Fixtures	5	
23.35.47.11.15	Weather Rated Lighting Fixtures	4	
23.35.47.11.15.11	Weather Rated Fluorescent Lighting Fixtures	5	
23.35.47.11.15.13	Weather Rated Halogen Lighting Fixtures	5	
23.35.47.11.15.15	Weather Rated High Intensity Discharge Lighting Fixtures	5	
23.35.47.11.15.17	Weather Rated Incandescent Lighting Fixtures	5	
23.35.47.11.15.19	Weather Rated Light Emitting Diode Lighting Fixtures	5	
23.35.47.11.17	Chandelier	4	
23.35.47.11.18	Explosion Proof Lighting Fixtures	4	
23.35.47.11.18.11	Explosion Proof Fluorescent Lighting Fixtures	5	
23.35.47.11.18.13	Explosion Proof Halogen Lighting Fixtures	5	
23.35.47.11.18.15	Explosion Proof High Intensity Discharge Lighting Fixtures	5	
23.35.47.11.18.17	Explosion Proof Incandescent Lighting Fixtures	5	
23.35.47.11.18.19	Explosion Proof Light Emitting Diode Lighting Fixtures	5	
23.35.47.11.19	Hazardous Lighting Fixtures	4	
23.35.47.11.19.11	Hazardous Fluorescent Lighting Fixtures	5	
23.35.47.11.19.13	Hazardous Halogen Lighting Fixtures	5	
23.35.47.11.19.15	Hazardous High Intensity Discharge Lighting Fixtures	5	
23.35.47.11.19.17	Hazardous Incandescent Lighting Fixtures	5	
23.35.47.11.19.19	Hazardous Light Emitting Diode Lighting Fixtures	5	
23.35.47.11.20	Security Lighting Fixtures	4	
23.35.47.11.21	Specialized Lighting Fixtures	4	
23.35.47.11.21.11	Lighting Bollards	5	
23.35.47.11.21.13	Lighting Poles	5	
23.35.47.11.21.15	Lighting Posts	5	
23.35.47.11.21.17	Buried Uplights	5	
23.35.47.11.21.19	Floodlight Fixtures	5	
23.35.47.11.21.21	Spotlight Fixtures	5	
23.35.47.11.21.21.11	Focus Spotlight Fixture	6	
23.35.47.11.21.21.13	Follow Spotlight Fixture	6	
23.35.47.11.21.21.15	Spotlight Bank Fixture	6	
23.35.47.11.21.21.17	Pin Spotlight Fixture	6	
23.35.47.11.21.23	Street and Roadway Lighting Fixtures	5	
23.35.47.11.21.25	Aircraft Paving Lighting Fixtures	5	
23.35.47.13	Emergency Lighting	3	
23.35.47.13.11	Hard Wired Emergency Lighting	4	
23.35.47.13.13	Emergency Lighting With Battery Backup	4	
23.35.47.13.15	Passive Emergency Lighting Strips	4	
23.35.47.13.17	Emergency Lighting Strobe	4	
23.35.47.15	Exit Illuminated Signs	3	
23.35.47.15.11	Battery Backup Exit Illuminated Signs	4	
23.35.47.15.13	Hard Wired Backup Exit Illuminated Signs	4	
23.35.47.15.15	Self Illuminated Exit Illuminated Signs	4	
23.35.47.17	Fiber Optic Lighting	3	
23.35.47.19	Communication Lighting Specialties	3	
23.35.47.19.11	Illuminated Signs Boards	4	
23.35.47.21	Accessories for Lighting	3	
23.35.47.21.11	Lampholders	4	
23.35.47.21.13	Lighting Diffusers	4	
23.35.47.21.15	Lighting Ballasts	4	
23.35.47.21.17	Lighting Tracks	4	
23.35.47.21.19	Lampshades	4	
23.35.47.23	Lamps	3	
23.35.47.23.11	Halogen Lamps	4	
23.35.47.23.13	Incandescent Lamps	4	
23.35.47.23.15	Discharge Lamps	4	
23.35.47.23.15.11	Fluorescent Lamps	5	
23.35.47.23.15.13	Compact Fluorescent Lamps	5	
23.35.47.23.15.15	Sodium Vapor Lamps	5	
23.35.47.23.15.17	High Pressure Discharge Lamps	5	
23.35.47.23.17	Light Emitting Diode Lamps	4	
23.37.00.00	Information and Communication Specific Products and Equipment	1	
23.37.11.00	Information Technology and Telecommunications Ducting Wireways Components	2	
23.37.11.11	Communication Service Penetrations	3	
23.37.11.13	Communication Cable Trays	3	
23.37.11.15	Communication Racks	3	
23.37.11.15.11	Information Technology Racks	4	
23.37.11.15.13	Telephone Racks	4	
23.37.11.15.15	Fiber Optic Equipment	4	
23.37.11.15.15.11	Fiber Optic Cabinets	5	
23.37.11.15.15.13	Fiber Adapter Panels	5	
23.37.11.17	Communication Wireways 	3	
23.37.11.17.11	Information Technology Wireways	4	
23.37.11.17.11.11	Underfloor Information Technology Wireways	5	
23.37.11.17.11.13	Vertical Information Technology Wire Raceways	5	
23.37.11.17.11.15	Horizontal Information Technology Wire Raceways	5	
23.37.11.17.13	Telecommunications Wireways	4	
23.37.11.17.13.11	Underfloor Telecommunications Wireways	5	
23.37.11.17.13.13	Vertical Telecommunications Wire Raceways	5	
23.37.11.17.13.15	Horizontal Telecommunications Wire Raceways	5	
23.37.11.17.15	Complete Visual Signaling	4	
23.37.11.17.15.11	Mechanical Signal Equipment	5	
23.37.13.00	Information Technology Equipment	2	
23.37.13.11	Personal Computer Equipment 	3	
23.37.13.11.11	Desktop Personal Computers	4	
23.37.13.11.13	Laptop Personal Computers	4	
23.37.13.11.15	Tablet Personal Computers	4	
23.37.13.11.17	Tower Stack Personal Computers	4	
23.37.13.11.19	Workstation Personal Computers	4	
23.37.13.11.21	Personal Digital Assistants	4	
23.37.13.11.23	Internal Computing Components 	4	
23.37.13.11.23.11	Computer Processing Units	5	
23.37.13.11.23.13	Computer Controller Cards	5	
23.37.13.11.23.15	Computer Memory Cards	5	
23.37.13.11.23.17	Personal Computer Modem Cards	5	
23.37.13.11.23.19	Personal Computer Network Interface Cards	5	
23.37.13.11.23.21	Personal Computer Video Cards	5	
23.37.13.13	Personal Computer and Network Security Devices 	3	
23.37.13.13.11	Computer Firewalls	4	
23.37.13.13.13	Computer Intrusion Detection Devices	4	
23.37.13.13.15	Computer Intrusion Protection Devices	4	
23.37.13.15	Local Area Network Devices 	3	
23.37.13.15.11	Local Area Network Bridges	4	
23.37.13.15.13	Local Area Network Communication Hardware	4	
23.37.13.15.15	Local Area Network Disk Drives	4	
23.37.13.15.17	Local Area Network Hubs	4	
23.37.13.15.19	Local Area Network Load Balancers	4	
23.37.13.15.21	Local Area Network Routers	4	
23.37.13.15.23	Local Area Network Servers	4	
23.37.13.15.25	Local Area Network Switches	4	
23.37.13.15.27	Local Area Network Tape Drives	4	
23.37.13.15.29	Local Area Network Wireless Devices	4	
23.37.13.17	Wide Area Network Devices 	3	
23.37.13.17.11	Wide Area Network Bridges	4	
23.37.13.17.13	Wide Area Network Communication Hardware	4	
23.37.13.17.15	Wide Area Network Disk Drives	4	
23.37.13.17.17	Wide Area Network Hubs	4	
23.37.13.17.19	Wide Area Network Load Balancers	4	
23.37.13.17.21	Wide Area Network Routers	4	
23.37.13.17.23	Wide Area Network Servers	4	
23.37.13.17.25	Wide Area Network Switches	4	
23.37.13.17.27	Wide Area Network Tape Drives	4	
23.37.13.17.29	Wide Area Network Wireless Devices	4	
23.37.13.19	Computer Storage Devices 	3	
23.37.13.19.11	Computer Optic Drives	4	
23.37.13.19.11.11	Compact Disk Drives	5	
23.37.13.19.11.13	Digital Video Disc Drives	5	
23.37.13.19.11.15	Combination Compact Disk and Digital Video Disc Drives	5	
23.37.13.19.13	Hard Disk Drives	4	
23.37.13.19.15	Flash Memory Drives	4	
23.37.13.19.17	Computer Tape Drives	4	
23.37.13.21	Computer Monitors 	3	
23.37.13.21.11	Computer Liquid Crystal Display Monitors	4	
23.37.13.21.13	Computer Catho Ray Tube Monitors	4	
23.37.13.23	Computer Printers 	3	
23.37.13.23.11	Computer Laser Printers	4	
23.37.13.23.13	Computer Inkjet Printers	4	
23.37.13.23.15	Computer Plotter Printers	4	
23.37.13.25	Computer Scanners	3	
23.37.13.27	Computer Video Conferencing Equipment 	3	
23.37.15.00	Audio Visual Equipment	2	
23.37.15.11	Cameras	3	
23.37.15.11.11	Analog Cameras	4	
23.37.15.11.13	Digital Cameras	4	
23.37.15.13	Camera Recorders	3	
23.37.15.13.11	Digital Camcorders	4	
23.37.15.13.13	Film Camcorders	4	
23.37.15.15	Digital Music Players	3	
23.37.15.17	Projection Equipment	3	
23.37.15.17.11	Projection Screens	4	
23.37.15.17.13	Projection Screen Stands	4	
23.37.15.19	Video Projectors	3	
23.37.15.19.11	Video Slide Projectors	4	
23.37.15.19.13	Video Overhead Projectors	4	
23.37.15.19.15	Video Film Projectors	4	
23.37.15.19.17	Video Slide Projectors	4	
23.37.15.19.19	Video Digital Projectors	4	
23.37.15.21	Audio Visual Recorders	3	
23.37.15.21.11	Audio Recorders	4	
23.37.15.21.13	Video Recorders	4	
23.37.15.21.15	Audio Video Recorders	4	
23.37.15.23	Stereo Equipment	3	
23.37.15.23.11	Stereo Amplifiers	4	
23.37.15.23.13	Stereo Patch Panels	4	
23.37.15.23.15	Stereo Speakers	4	
23.37.15.25	Televisions	3	
23.37.15.25.11	Cathoray Tube Televisions	4	
23.37.15.25.13	Liquid Crystal Display Televisions	4	
23.37.15.25.15	Plasma Display Televisions	4	
23.37.15.25.17	Projection Screen Televisions	4	
23.37.15.25.19	Television Mounts	4	
23.37.15.27	Video Recording Equipment	3	
23.37.15.29	Audio Equipment	3	
23.37.15.29.11	Sound Reinforcement Equipment	4	
23.37.15.29.11.11	Microphones	5	
23.37.15.29.11.13	Loudspeakers	5	
23.37.15.29.11.15	Sound Amplifiers	5	
23.37.15.29.11.17	Audio Equalizers	5	
23.37.15.29.13	Headphones	4	
23.37.15.29.15	Audio Reproducing Units	4	
23.37.17.00	Audio Information Equipment	2	
23.37.17.11	Sound Devices	3	
23.37.17.13	Signal Devices 	3	
23.37.17.13.11	Bells	4	
23.37.17.13.13	Carillons	4	
23.37.17.13.15	Sirens	4	
23.37.17.13.17	Aerials	4	
23.37.17.13.19	Speakers	4	
23.37.17.15	Public Address Equipment	3	
23.37.19.00	Visual Information Systems	2	
23.37.19.11	Cathode Ray Tube (CRT) Video Monitors	3	
23.37.19.13	Liquid Crystal Display (LCD) Video Monitors	3	
23.37.19.15	Plasma Video Monitors	3	
23.37.19.17	Video Walls	3	
23.37.21.00	Audio Visual Systems	2	
23.37.21.11	Broadcasting Receiving Equipment	3	
23.37.21.13	Film Projectors	3	
23.37.21.15	Data Multi Media Projectors	3	
23.37.21.17	Video Reproduction	3	
23.37.23.00	Telecommunications Equipment	2	
23.37.23.11	Wireless Phone Equipment	3	
23.37.23.11.11	Wireless Phones	4	
23.37.23.11.13	Wireless Phone Chargers	4	
23.37.23.13	Telephones	3	
23.37.23.13.11	Single Line Telephones	4	
23.37.23.13.13	Multiple Line Telephones	4	
23.37.23.15	Telephone Equipment	3	
23.37.23.15.11	Private Branch Exchanges	4	
23.37.23.15.13	Telephone Patch Panels	4	
23.37.23.17	Intercom Equipment	3	
23.37.23.17.11	Intercoms	4	
23.37.23.17.13	Door Entry Telephones	4	
23.37.23.19	Radio Broadcast Equipment	3	
23.37.23.19.11	Radio Booths	4	
23.37.23.19.11.11	Radio Broadcast Booths	5	
23.37.23.19.11.13	Radio Recording Booths	5	
23.37.23.19.13	Radio Broadcast Transmitters	4	
23.37.23.19.15	Radio Broadcast Receivers	4	
23.37.23.19.17	Radio Communication Base Stations	4	
23.37.23.19.19	Radio Communication Call Microphones	4	
23.37.23.19.21	Radio Broadcast Transmission Towers	4	
23.37.23.21	Radio Communication Equipment	3	
23.37.23.21.11	Infra Red Radio Communication Equipment	4	
23.37.23.21.11.11	Infra Red Radio Communication Receivers	5	
23.37.23.21.11.13	Infra Red Radio Communication Transmitters	5	
23.37.23.21.11.15	Infra Red Radio Communication Transmitter Receivers	5	
23.37.23.21.13	Satellite Radio Communication Equipment	4	
23.37.23.21.13.11	Satellite Radio Communication Transmitters	5	
23.37.23.21.13.13	Satellite Radio Communication Transmitter Receivers	5	
23.37.23.21.13.15	Satellite Radio Communications Receivers	5	
23.37.23.21.15	Wireless Radio Communication Equipment	4	
23.37.23.21.15.11	Wireless Radio Communication Receivers	5	
23.37.23.21.15.13	Wireless Radio Communication Transmitters	5	
23.37.23.21.15.15	Wireless Radio Communication Transmitter Receivers	5	
23.37.23.21.17	Radio Communication Antenna Towers	4	
23.37.23.21.19	Radio Communication Transmission Towers	4	
23.37.23.23	Satellite Communication Equipment	3	
23.37.23.23.11	Satellite Communication Dishes	4	
23.37.25.00	Broadcasting Communications Equipment	2	
23.37.25.11	Broadcasting Communication Circuits	3	
23.37.25.13	Broadcasting Intercommunication Equipment	3	
23.37.25.15	Broadcasting Communication and Data Processing Equipment	3	
23.37.25.17	Broadcasting Cable Transmission and Reception Equipment	3	
23.37.25.17.11	Broadcasting Cable Transmission and Reception Amplifiers	4	
23.37.25.17.13	Broadcasting Cable Transmission and Reception Modulators	4	
23.37.25.17.15	Broadcasting Cable Transmission and Reception Control Equipment	4	
23.37.25.19	Broadcast Transmission and Reception Equipment	3	
23.37.25.19.11	Broadcast Transmitters	4	
23.37.25.19.13	Broadcast Antennas	4	
23.37.25.19.15	Broadcast Amplifiers	4	
23.37.25.19.17	Broadcast Control Equipment	4	
23.37.25.21	Broadcasting Microwave Transmission and Reception Equipment	3	
23.37.25.21.11	Broadcasting Microwave Transmitters	4	
23.37.25.21.13	Broadcasting Microwave Antennas	4	
23.37.25.21.15	Broadcasting Satellite Dishes	4	
23.37.25.21.17	Broadcasting Microwave Amplifiers	4	
23.37.25.21.19	Broadcasting Microwave Receivers	4	
23.37.25.23	Broadcasting Equipment	3	
23.37.25.23.11	Television Broadcasting Equipment	4	
23.37.25.23.13	Multimedia Broadcasting Equipment	4	
23.37.25.23.15	Broadcasting Light Signals	4	
23.37.27.00	Emergency Communications	2	
23.37.27.11	Duress Notification Devices	3	
23.37.27.13	Mass Notification Systems	3	
23.37.27.13.11	Emergency Notification Devices	4	
23.37.27.13.13	Imminent Danger Notification Devices	4	
23.37.27.15	Intercoms	3	
23.37.27.15.11	Audio Intercoms	4	
23.37.27.15.13	Audio Visual Intercoms	4	
23.37.27.17	Emergency Call Equipment	3	
23.37.27.17.11	Call Systems for the Disabled	4	
23.37.27.17.13	Nurse Call Equipment	4	
23.39.00.00	Utility and Transportation Products	1	
23.39.11.00	Roadway Monitoring and Control	2	
23.39.11.11	Traffic Safety Barriers and Protections	3	
23.39.11.11.11	Safety Barriers	4	
23.39.11.11.11.11	Crash Barriers ( including Impact Attenuating Devices)	5	
23.39.11.11.11.13	Median Barriers	5	
23.39.11.11.11.15	Guardrails	5	
23.39.11.11.13	Noise Barriers	4	
23.39.11.11.15	Traffic Barriers	4	
23.39.11.11.15.11	Traffic Delineators	5	
23.39.11.11.17	Traffic Control	4	
23.39.11.11.17.11	Traffic Speed Bumps	5	
23.39.11.11.19	Roadway Curbs	4	
23.39.11.11.21	Roadway Gutters	4	
23.39.11.11.23	Roadway Cattle Guards	4	
23.39.11.13	Roadway Signage	3	
23.39.11.15	Roadway Markers	3	
23.39.11.15.11	Roadway Surface Markings	4	
23.39.11.15.13	Roadway Reflectors	4	
23.39.11.15.15	Traffic Cones	4	
23.39.11.15.17	Traffic Signals	4	
23.39.11.15.19	Traffic Monitoring Equipment	4	
23.39.11.15.17	Roadway Mirrors	4	
23.39.11.15.19	Traffic Cameras	4	
23.39.11.15.21	Traffic Detectors and Sensors	4	
23.39.11.17	Vehicle Control Barriers	3	
23.39.11.17.11	Anti Ram Planters	4	
23.39.11.17.13	Jersey Barriers	4	
23.39.11.17.15	Active Tire Shredders	4	
23.39.11.17.17	Passive Tire Shredders	4	
23.39.11.19	Bollards 	3	
23.39.11.19.11	Active Anti Ram Bollards	4	
23.39.11.19.13	Passive Anti Ram Bollards	4	
23.39.11.19.15	Architectural Bollards	4	
23.39.13.00	Tunnels and Bridges	2	
23.39.13.11	Tunnels	3	
23.39.13.11.11	Tunnel Shafts	4	
23.39.13.11.13	Tunnel Segments	4	
23.39.13.11.15	Tunnel Linings	4	
23.39.13.11.17	Tunnel Grouting	4	
23.39.13.11.17.11	Earth Stabilization Chemical Grouting	5	
23.39.13.11.17.13	Rock Seam Pressure Grouting	5	
23.39.13.11.17.15	Tunnel Liner Grouting	5	
23.39.13.11.19	Microtunneling	4	
23.39.13.13	Bridges	3	
23.39.13.13.11	Prefabricated Bridges	4	
23.39.13.13.13	Bridge Beams	4	
23.39.13.13.15	Bridge Trusses	4	
23.39.13.13.17	Bridge Cable	4	
23.39.13.13.19	Bridge Bearings	4	
23.39.13.13.19.11	Fixed Bridge Bearings	5	
23.39.13.13.19.13	Expansion Bridge Bearings	5	
23.39.13.13.19.15	Multi Rotational Bridge Bearings	5	
23.39.13.13.21	Bridge Movable Mechanism	4	
23.39.13.13.23	Bridge Decking	4	
23.39.13.13.25	Bridge Drainage	4	
23.39.13.13.27	Bridge Safety Barriers	4	
23.39.13.13.27.11	Shock Absorbers	5	
23.39.13.13.27.13	Bridge Parapets	5	
23.39.13.13.27.15	Bridge Railings	5	
23.39.13.13.29	Bridge Expansion Joints	4	
23.39.13.13.29.11	Bridge Expansion Joint Assemblies	5	
23.39.15.00	Railways	2	
23.39.15.11	Railway Track Equipment	3	
23.39.15.11.11	Railway Ties	4	
23.39.15.11.11.11	Railway Concrete Ties	5	
23.39.15.11.11.13	Railway Wood Ties	5	
23.39.15.11.13	Railway Rails	4	
23.39.15.11.15	Railway Turnouts	4	
23.39.15.11.17	Railway Bumpers	4	
23.39.15.13	Railway Platform Components	3	
23.39.15.15	Railway Electrification Equipment	3	
23.39.15.15.11	Railway Surge Arresters	4	
23.39.15.15.13	Railway Traction Lines	4	
23.39.15.15.13.11	Railway Traction Line Pylons	5	
23.39.15.17	Railway Monitoring and Control	3	
23.39.15.17.11	Railway Signaling Devices	4	
23.39.15.17.13	Railway Control Instrumentation	4	
23.39.15.19	Railway Locomotives	3	
23.39.15.19.11	Railway Diesel Locomotives	4	
23.39.15.19.13	Railway Electric Locomotives	4	
23.39.15.21	Railway Cars	3	
23.39.15.21.11	Railway Passenger Cars	4	
23.39.15.21.13	Railway Sleeper Cars	4	
23.39.15.21.15	Railway Baggage Cars	4	
23.39.15.21.17	Railway Diner Cars	4	
23.39.15.21.19	Railway Freight Cars	4	
23.39.15.21.19.11	Railway Box Cars	5	
23.39.15.21.19.13	Railway Coal Cars	5	
23.39.15.21.19.15	Railway Vehicle Carrier Cars	5	
23.39.15.21.21	Railway Tanker Cars	4	
23.39.15.21.23	Railway Car Equipment	4	
23.39.15.21.23.11	Railway Car Bumpers	5	
23.39.15.21.23.13	Railway Car Electrical Connectors	5	
23.39.17.00	Funiculars	2	
23.39.17.11	Cable Trams	3	
23.39.17.13	Cable Cars	3	
23.39.17.15	Funicular Cable Rails	3	
23.39.17.17	Funicular Cables	3	
23.39.17.19	Aerial Tramways	3	
23.39.17.21	Chair Lifts	3	
23.39.17.23	Ski Lifts	3	
23.39.17.23.11	Ski Pole Lifts	4	
23.39.17.23.13	Ski Chair Lifts	4	
23.39.19.00	Aviation Equipment	2	
23.39.19.11	Aviation Monitoring and Control	3	
23.39.19.11.11	Approach Indication Equipment	4	
23.39.19.11.13	Aviation Monitoring Equipment	4	
23.39.19.11.13.11	Aviation Windsocks	5	
23.39.19.13	Aviation Barriers	3	
23.39.19.13.11	Jet Blast Barriers	4	
23.39.19.13.13	Aviation Sound Barriers	4	
23.39.21.00	Marine Construction Waterways and Seaways	2	
23.39.21.11	Navigation Facilities	3	
23.39.21.11.11	Components?	4	
23.39.21.11.11.11	Mooring Posts	5	
23.39.21.11.11.13	Boat Fenders	5	
23.39.21.11.13	Canal Locks	4	
23.39.21.11.13.11	Canal Lock Gates	5	
23.39.21.11.13.11.11	Canal Hydraulic Gates	6	
23.39.21.11.13.11.13	Canal High Pressure Gates	6	
23.39.21.11.13.11.15	Canal Hinged Leaf Gates	6	
23.39.21.11.13.11.17	Canal Radial Gates	6	
23.39.21.11.13.11.19	Canal Slide Gates	6	
23.39.21.11.13.11.21	Canal Sluice Gates	6	
23.39.21.11.13.11.23	Canal Spillway Crest Gates	6	
23.39.21.11.13.11.25	Canal Vertical Lift Gates	6	
23.39.21.11.13.13	Canal Hydraulic Valves	5	
23.39.21.11.13.13.11	Canal Butterfly Valves	6	
23.39.21.11.13.13.13	Canal Regulating Valves	6	
23.39.21.11.15	Piers and Docks	4	
23.39.21.11.15.11	Floating Docks	5	
23.39.21.11.15.13	Dock Loading Ramps	5	
23.39.21.11.17	Pontoons	4	
23.39.21.11.19	Jetties	4	
23.39.21.13	Waterflow Controls	3	
23.39.21.13.11	Reservoirs	4	
23.39.21.13.13	"Dams, Dikes"	4	
23.39.21.13.15	Weirs	4	
23.39.21.13.17	Barrages	4	
23.39.21.13.19	Bifurcation Panels	4	
23.39.21.13.21	Manifolds	4	
23.39.21.13.23	Penstocks and Sluice Gate	4	
23.39.21.13.25	Trash Rakes	4	
23.39.21.15	Breakwater Products	3	
23.39.21.15.11	Bulkheads	4	
23.39.21.15.13	Seawalls	4	
23.39.21.15.15	Moles and Breakwater	4	
23.39.21.15.17	Groins	4	
23.39.21.17	Marine Monitoring and Control	3	
23.39.21.17.11	Navigation Signs	4	
23.39.21.17.13	Navigation Lights	4	
23.39.21.17.15	Navigation Monitoring Equipment	4	
23.39.23.00	Electrical Utility Equipment	2	
23.39.23.11	Electrical Transmission Equipment	3	
23.39.23.11.11	Electrical Utility Poles	4	
23.39.23.11.13	Electrical Utility Towers	4	
23.39.25.00	Natural Gas Utility Equipment	2	
23.39.25.11	Natural Gas Utility Pipeline Equipment	3	
23.39.27.00	Water Utility Equipment	2	
23.39.27.11	Water Utility Pipeline Equipment	3	
23.39.29.00	Waste Water Collection and Removal	2	
23.39.29.11	Waste Water Drains	3	
23.39.29.11.11	Waste Water French Drains	4	
23.39.29.11.13	Waste Water Storm Drain	4	
23.39.29.11.13.11	Manhole (Goes in Prefab Concrete)	5	
23.39.29.11.13.13	Manhole Cover	5	
23.39.29.11.13.15	Manhole Ladder	5	
23.39.29.11.13.17	Manhole Rung	5	
23.39.29.11.15	"Waste Water Drainage Pipes, Couplings, Collectors"	4	
23.39.29.11.17	Wastewater Pipework Access Fittings	4	
23.39.29.13	Waste Water Subdrainage	3	
23.39.29.13.11	Geocomposite Drains	4	
23.39.29.13.13	Geotextile Subsurface Drainage Filtration	4	
23.39.29.13.15	Pipe Underdrain and Pavement Base Drain	4	
23.39.29.13.17	Subgrade Drains	4	
23.39.29.13.19	Surface Water Drainage Systems	4	
23.39.29.13.19.11	"Surface Water Catch Basins, Grates, and Frames"	5	
23.39.29.13.19.13	Combination Storm Drain and Underdrain Inlets	5	
23.39.29.13.19.15	"Storm Drainage Manholes, Frames, and Covers"	5	
23.39.29.13.19.17	Surface Water Retention Chambers	5	
23.39.29.13.21	Storm Water Ponds and Reservoirs	4	
23.39.29.13.2.19	Surface Water Retention Basins	5	
23.39.29.13.21.21	Storm Water Pond Covers	5	
23.39.29.13.21.9.23	Storm Water Pond Liners	6	
23.39.29.15	"Waste Water Channels, Gullies, Gratings, Covers"	3	
23.39.31.00	Packaged Waste Water Treatment	2	
23.39.31.11	Packaged Stations	3	
23.39.31.11.11	Packaged Pumping Stations	4	
23.39.31.11.13	Packaged Lift Stations	4	
23.39.31.13	Packaged Sewage Treatment Plants	3	
23.39.33.00	Water and Waste Water Preliminary Treatment Equipment	2	
23.39.33.11	Screening Equipment	3	
23.39.33.11.11	Climber-type Bar Screens	4	
23.39.33.11.13	Chain-and-Rage Bar Screens	4	
23.39.33.11.15	Flexible Rake Bar Screens	4	
23.39.33.11.17	Catenary Bar Screens	4	
23.39.33.11.19	Continuous Belt Screens	4	
23.39.33.11.21	Cylindrical Bar Screens	4	
23.39.33.11.23	Step Screens	4	
23.39.33.11.25	Rotary Drum Screens	4	
23.39.33.11.27	Spiral Screens	4	
23.39.33.11.29	Band Screens	4	
23.39.33.11.31	Disc Screens	4	
23.39.33.11.33	Traveling Screens	4	
23.39.33.11.35	Perforated Plate Screens	4	
23.39.33.11.37	Wedge Wire Screens	4	
23.39.33.11.39	Element Screens	4	
23.39.33.11.41	Trash Raking Equipment	4	
23.39.33.11.43	Screenings Washing and Compacting Equipment	4	
23.39.33.11.45	Vacuum Screenings Conveying Equipment	4	
23.39.33.11.47	Screenings Storage Containers	4	
23.39.33.11.49	Septage Receiving Equipment	4	
23.39.33.13	Grit Removal and Handling Equipment	3	
23.39.33.13.11	Chain-and-Bucket Grit Removal Equipment	4	
23.39.33.13.13	Chain-and-Flight Grit Removal Equipment	4	
23.39.33.13.15	Vortex Grit Removal Equipment 	4	
23.39.33.13.17	Cyclone Degritters	4	
23.39.33.13.19	Aerated Grit Removal Equipment	4	
23.39.33.13.21	Inline Baffled Grit Removal Equipment 	4	
23.39.33.13.23	Traveling Bridge Grit Removal Equipment	4	
23.39.33.13.25	Grit Classifying and Washing Equipment	4	
23.39.33.13.27	Grit Storage Containers	4	
23.39.33.15	Grinding and Shredding Equipment	3	
23.39.33.15.11	Macerators	4	
23.39.33.15.13	Comminutors	4	
23.39.33.15.15	Inline Grinders	4	
23.39.33.15.17	Open-Channel Grinders 	4	
23.39.33.15.19	Modular Grinding-Screening-Compacting Equipment	4	
23.39.33.17	Oil and Grease Separation and Removal Equipment	3	
23.39.33.17.11	Coalescing Oil-Water Separators	4	
23.39.33.17.13	API Oil-Water Separators	4	
23.39.33.17.15	Grease Traps	4	
23.39.33.17.17	Dissolved Air Flotation Grease and Oil Separation Equipment	4	
23.39.33.17.19	Helical Scum Skimming and Removal Equipment	4	
23.39.33.17.21	Tipping Trough Scum Skimming and Removal Equipment	4	
23.39.33.17.23	Chain and Flight Scum Collection and Removal Equipment	4	
23.39.33.17.25	Floating Scum Skimming and Removal Equipment 	4	
23.39.35.00	Water and Wastewater Chemical Feed Equipment	2	
23.39.35.11	Gas Chemical Feed Equipment	3	
23.39.35.11.11	Chlorine Gas Feed Equipment	4	
23.39.35.11.13	Sulfur Dioxide Gas Feed Equipment	4	
23.39.35.11.15	Ammonia Gas Feed Equipment	4	
23.39.35.11.17	"Gas Storage, Weighing, and Leak Detection Equipment"	4	
23.39.35.11.19	Chlorine Dioxide Reactors	4	
23.39.35.11.21	Carbon Dioxide Gas Feed Equipment 	4	
23.39.35.11.23	Ozone Generating and Feed Equipment 	4	
23.39.35.11.25	Liquid Oxygen Storage and Feed Equipment	4	
23.39.35.11.27	Cleaning Requirements for Oxygen Service 	4	
23.39.35.11.29	Gas Chemical Feed Accessories and Safety Equipment	4	
23.39.35.13	Liquid Chemical Feed Equipment	3	
23.39.35.13.11	Sodium Hypochlorite Generating Equipment	4	
23.39.35.13.13	Liquid Chemical Weighing Equipment	4	
23.39.35.13.15	Polymer Blending and Feed Equipment	4	
23.39.35.13.17	Diaphragm-type Metering Pumps	4	
23.39.35.13.19	Peristaltic Metering Pumps	4	
23.39.35.13.21	Progressing Cavity Metering Pumps	4	
23.39.35.13.23	Lobe Metering Pumps	4	
23.39.35.13.25	Drum Pumps	4	
23.39.35.13.27	Liquid Chemical Transfer Pumps	4	
23.39.35.13.29	Liquid Chemical Diffusers	4	
23.39.35.13.31	Liquid Chemical Feed Accessories and Safety Equipment	4	
23.39.35.15	Dry Chemical Feed Equipment	3	
23.39.35.15.11	Storage Silos	4	
23.39.35.15.13	Dry Chemical Weighing Equipment	4	
23.39.35.15.15	Volumetric Feed Equipment	4	
23.39.35.15.17	Gravimetric Feed Equipment	4	
23.39.35.15.19	Lime Slaking Equipment	4	
23.39.35.15.21	Chemical Tablet Feeding Equipment	4	
23.39.35.15.23	Dry Chemical Feed Accessories and Safety Equipment	4	
23.39.37.00	Water and Wastewater Clarification and Mixing Equipment	2	
23.39.37.11	Mixing Equipment	3	
23.39.37.11.11	Rapid Mixers	4	
23.39.37.11.13	Inline Blender-type Rapid Mixers	4	
23.39.37.11.15	Induction-type Rapid Mixing Equipment 	4	
23.39.37.11.17	Inline Static Mixers	4	
23.39.37.11.19	Mixing Equipment 	4	
23.39.37.11.21	Submersible Mixers	4	
23.39.37.11.23	Floating Mechanical Mixers	4	
23.39.37.11.25	Paddle Mixers	4	
23.39.37.11.27	Pin Mixers	4	
23.39.37.11.29	Vertical Reel Flocculation Equipment	4	
23.39.37.11.31	Horizontal Reel Flocculation Equipment	4	
23.39.37.11.33	Vertical Turbine Flocculation Equipment	4	
23.39.37.11.35	Walking-beam Flocculation Equipment	4	
23.39.37.11.37	Horizontal Oscillating Flocculation Equipment 	4	
23.39.37.11.39	Top-entering Tank Mixers 	4	
23.39.37.11.41	Side-entry Tank Mixers	4	
23.39.37.11.43	Portable Tank Mixers	4	
23.39.37.13	Clarifier Equipment	3	
23.39.37.13.11	Chain-and-Flight Clarifier Equipment	4	
23.39.37.13.13	Traveling Bridge Clarifier Equipment	4	
23.39.37.13.15	Differential Head Clarifier Equipment 	4	
23.39.37.13.17	Oscillating Scraper-type Clarifier Equipment 	4	
23.39.37.13.19	Circular Clarifier Equipment	4	
23.39.37.13.21	Solids Contact Clarifier Equipment	4	
23.39.37.13.23	"Flocculating Clarifier, Pulsating Sludge Blanket Type "	4	
23.39.37.13.25	Dissolved Air Flotation Equipment for Water Treatment	4	
23.39.37.13.27	Ballasted High-rate Clarifier Equipment 	4	
23.39.37.13.29	High rate Clarification/Thickening Equipment 	4	
23.39.37.13.31	Tube Settlers	4	
23.39.37.13.33	Lined Plate Settlers	4	
23.39.37.15	Sediment Removal Equipment	3	
23.39.37.15.11	Tipping Sediment Flushing Tanks	4	
23.39.37.15.13	Flushing Gates	4	
23.39.37.15.15	Water Cannon	4	
23.39.39.00	Water and Wastewater Secondary Treatment Equipment	2	
23.39.39.11	Air and Gas Diffusion Equipment	3	
23.39.39.11.11	Fixed Mechanical Aerators	4	
23.39.39.11.13	Floating Mechanical Aerators	4	
23.39.39.11.15	Submersible Aspirating Aerator Equipment	4	
23.39.39.11.17	Jet Aeration Equipment	4	
23.39.39.11.19	Coarse Bubble Diffusers	4	
23.39.39.11.21	Swing-type Channel Aeration Equipment	4	
23.39.39.11.23	Shear Box Diffusers	4	
23.39.39.11.25	Flexible Membrane Tube Diffusers	4	
23.39.39.11.27	Flexible Membrane Disc Diffusers	4	
23.39.39.11.29	Ceramic Disc Fine Bubble Diffusers	4	
23.39.39.11.31	Floating Membrane Diffusers 	4	
23.39.39.11.33	Membrane Diffusers 	4	
23.39.39.11.35	Cascading Aerators	4	
23.39.39.11.37	Pure-oxygen Generating Equipment 	4	
23.39.39.13	Biological Treatment Systems	3	
23.39.39.13.11	Rotating Biological Contactors 	4	
23.39.39.13.13	Trickling Filter Rotary Distributor Equipment	4	
23.39.39.13.15	Trickling Filter Media	4	
23.39.39.13.17	Bio-towers	4	
23.39.39.13.19	Moving-bed Biological Reactors	4	
23.39.39.13.21	Integrated Fixed-film Activated Sludge Equipment	4	
23.39.39.13.23	Intermittent Sand Filters for Wastewater Treatment	4	
23.39.39.13.25	Deep-bed Denitrification Filters	4	
23.39.39.13.27	Biologically Activated Filters	4	
23.39.39.13.29	Membrane Biological Reactors	4	
23.39.39.13.31	Sequencing Batch Reactors	4	
23.39.39.13.33	Oxidation Ditch Equipment	4	
23.39.39.13.35	Vertical Loop Reactors	4	
23.39.41.00	Water and Wastewater Advanced Treatment Equipment	2	
23.39.41.11	Filtration Equipment	3	
23.39.41.11.11	Filter Media	4	
23.39.41.11.13	Filter Surface Wash Agitators	4	
23.39.41.11.15	Filter Air Scour Equipment	4	
23.39.41.11.17	Wash Water Troughs	4	
23.39.41.11.19	Pressure Filters	4	
23.39.41.11.21	Gravity Filters	4	
23.39.41.11.23	High-rate Sand Filters 	4	
23.39.41.11.25	Traveling Bridge Filters	4	
23.39.41.11.27	Microfiltration and Ultrafiltration Membrane Equipment 	4	
23.39.41.11.29	Disc Cloth Filters	4	
23.39.41.11.31	Rotary Drum Cloth Filters 	4	
23.39.41.11.33	Automatic Backwash Cloth Filter Equipment 	4	
23.39.41.11.35	Cartridge Filters	4	
23.39.41.11.37	Bag Filters	4	
23.39.41.11.39	Automatic Straining Equipment	4	
23.39.41.13	Demineralization Equipment	3	
23.39.41.13.11	Ion-exchange Vessel Media	4	
23.39.41.13.13	Electrodialysis Reversal Equipment	4	
23.39.41.13.15	Reverse Osmosis and Nanofiltration Membrane Equipment	4	
23.39.41.13.17	Multiple-effect Distillation Equipment	4	
23.39.41.13.19	Desalination Mechanical Vapor Compression Equipment	4	
23.39.41.13.21	Desalination Thermal Vapor Compression Equipment	4	
23.39.41.13.23	Desalination Multi-stage Flash Equipment	4	
23.39.41.13.25	Desalination Falling Film Evaporators	4	
23.39.41.13.27	Desalination Rising Film Evaporators	4	
23.39.41.13.29	Desalination Forced-circulation Crystallizing Equipment	4	
23.39.41.13.31	Desalination Spray Dry Evaporation Equipment	4	
23.39.41.13.33	Demineralization Energy Recovery Equipment	4	
23.39.41.15	Ultraviolet Equipment	3	
23.39.41.15.11	Closed-vessel Low-pressure/Low-intensity Ultraviolet Treatment Equipment	4	
23.39.41.15.13	Closed-vessel Low-pressure/High-intensity Ultraviolet Treatment Equipment	4	
23.39.41.15.15	Closed-vessel Medium-pressure Ultraviolet Treatment Equipment	4	
23.39.41.15.17	Open-channel Low-pressure/Low-intensity Ultraviolet Treatment Equipment	4	
23.39.41.15.19	Open-channel Low-pressure/High-intensity Ultraviolet Treatment Equipment	4	
23.39.41.15.21	Open-channel Medium-pressure Ultraviolet Treatment Equipment	4	
23.39.43.00	Water and Wastewater Residuals Handling and Treatment	2	
23.39.43.11	Residuals Thickening Equipment	3	
23.39.43.11.11	Circular Gravity Thickeners	4	
23.39.43.11.13	Gravity Belt Thickeners	4	
23.39.43.11.15	Dissolved Air Flotation Thickening Equipment	4	
23.39.43.11.17	Rotary Drum Thickening Equipment	4	
23.39.43.11.19	Centrifuge Thickening Equipment	4	
23.39.43.11.21	Disc Thickeners 	4	
23.39.43.11.23	Thickening Screw Press 	4	
23.39.43.11.25	Scum Concentrator Equipment	4	
23.39.43.13	Residuals Stabilization 	3	
23.39.43.13.11	Digester Covers and Appurtenances	4	
23.39.43.13.11.11	Fixed Covers	5	
23.39.43.13.11.13	Floating Covers	5	
23.39.43.13.11.15	Gasholder Covers	5	
23.39.43.13.13	Radial Beam Fixed Digester Covers	4	
23.39.43.13.15	Dual Deck Truss-type Fixed Digester Covers	4	
23.39.43.13.17	Radial Beam Floating Digester Covers	4	
23.39.43.13.19	Dual Deck Truss-type Floating Digester Covers	4	
23.39.43.13.21	Radial Beam Floating Gas-holding Digester Covers	4	
23.39.43.13.23	Dual Deck Truss-type Floating Gas-holding Digester Covers	4	
23.39.43.13.25	Digester Appurtenances	4	
23.39.43.13.27	Aerobic Digester Aeration Equipment	4	
23.39.43.13.29	Autothermal Thermophilic Aerobic Digestion Equipment	4	
23.39.43.13.31	Egg-shaped Digesters	4	
23.39.43.13.33	Confined Gas Mixing System 	4	
23.39.43.13.35	Digester Heating Equipment	4	
23.39.43.13.37	Residuals Pasteurization Equipment	4	
23.39.43.15	Residuals Dewatering Equipment	3	
23.39.43.15.11	Vacuum Filters	4	
23.39.43.15.13	Belt Filter Presses	4	
23.39.43.15.15	Plate-and-Frame Filter Presses	4	
23.39.43.15.17	Rotary Presses	4	
23.39.43.15.19	Screw Presses	4	
23.39.43.15.21	Dewatering Centrifuges	4	
23.39.43.15.23	Belt Dryers	4	
23.39.43.15.25	Direct-heat Residuals Drying Equipment	4	
23.39.43.15.27	Indirect-heat Residuals Drying Equipment	4	
23.39.43.17	Thermal Treatment of Residuals	3	
23.39.43.17.11	Multiple-hearth Sludge Incinerators	4	
23.39.43.17.13	Fluidized-bed Sludge Incinerators	4	
23.39.43.17.15	Ash Handling Equipment 	4	
23.39.43.17.17	Recuperative Air Preheating Equipment	4	
23.39.43.17.19	Regenerative Thermal Oxidizers	4	
23.39.43.17.21	Waste Heat Recovery Boilers	4	
23.39.43.17.23	Waste Heat Recovery Heat Exchangers	4	
23.39.43.17.25	Thermal Oxidation Equipment 	4	
23.39.45.00	Septic System Equipment	2	
23.39.45.11	Liquid Waste Treatment	3	
23.39.45.11.11	Liquid Waste Decanter	4	
23.39.45.11.13	Bacterial Filter Tanks	4	
23.39.45.11.15	Liquid Waste Decanters	4	
23.39.45.11.17	Liquid Waste Separators	4	
23.39.45.11.19	Liquid Waste Pond and Reservoir Products	4	
23.39.45.11.19.11	Liquid Waste Pond Covers	5	
23.39.45.11.19.13	Liquid Waste Pond Liners	5	
23.39.45.11.21	Additives for Treatment of Liquid Waste	4	
23.39.45.11.21.11	Additives for Waste Water and Sewage Treatment	5	
23.39.45.11.21.13	Additives for Residue Treatment	5	
23.39.45.13	Liquid Waste Monitoring and Control	3	
23.39.45.13.11	Detectors of Water Pollution	4	
23.39.45.15	Solid Waste Disposal Plant Products	3	
23.39.45.15.11	Chutes and Collectors	4	
23.39.45.15.13	Pneumatic Waste Equipment	4	
23.39.45.15.15	Incineration Plant	4	
23.39.45.15.15.11	Packaged Incinerators	5	
23.39.45.15.17	Crusher Plant	4	
23.39.45.15.17.11	Waste Compactors and Destructors	5	
23.39.45.15.19	Baling Plant	4	
23.39.45.15.21	Pulping Machines	4	
23.39.45.17	Solid Waste Handling Products 	3	
23.39.45.19	Solid Waste Impelling Equipment	3	
23.39.45.21	Solid Waste Treatment Equipment	3	
23.39.45.21.11	"Solid Waste Compactors, Destructors, and Balers"	4	
23.39.45.21.13	Solid Waste Crushers	4	
23.39.45.21.15	Solid Waste Pulping Machines	4	
23.39.45.21.17	Solid Waste Shredding Machines	4	
23.39.45.21.19	Incinerators	4	
23.39.45.21.19.11	Solid Waste Incinerators	5	
23.39.45.21.19.13	Packaged Incinerators	5	
23.39.45.23	Solid Waste Monitoring and Control Equipment	3	
23.39.45.23.11	Solid Waste Metal Detectors	4	
23.39.45.23.13	Solid Waste Detectors for Other Solids	4	
23.39.45.25	Solid Waste Collection and Removal Products	3	
23.39.45.25.11	Complete Solid Waste Removal Systems	4	
23.39.45.25.13	Solid Waste Bins	4	
23.39.45.25.15	Gravity Chute Solid Waste Systems	4	
23.39.45.25.17	Refuse Disposal Chutes	4	
23.39.45.25.17.11	Refuse Hoppers	5	
23.39.45.25.17.13	Refuse Chute Doors	5	
23.39.45.25.17.15	Refuse Chute Decontamination Units	5	
23.39.45.27	Solid Waste Handling Systems	3	
23.39.45.27.11	Refuse Compactors	4	
23.39.45.27.13	Refuse Containers	4	
23.39.45.27.15	Dust Collectors	4	
23.39.45.27.17	Utility Poles	4	
23.39.47.00	Offshore Structures	2	
23.40.00.00	Equipment and Furnishings	1	
23.40.05.00	Plants and Planting Products	2	
23.40.05.11	Planting Products	3	
23.40.05.11.14	Plant Maintenance Products	4	
23.40.05.11.14.17	Mowing Equipment	5	
23.40.05.11.14.21	Pruning Equipment	5	
23.40.05.11.14.24	Watering Equipment	5	
23.40.05.11.14.27	Irrigation System	5	
23.40.05.17	Exterior Plants	3	
23.40.05.17.11	Ground Covers	4	
23.40.05.17.14	Plants and Bulbs	4	
23.40.05.17.17	Shrubs	4	
23.40.05.17.21	Coniferous Trees	4	
23.40.05.17.24	Deciduous Trees	4	
23.40.05.21	Planting Accessories	3	
23.40.05.21.11	Landscaping Edging	4	
23.40.05.21.14	Landscape Timbers	4	
23.40.05.21.17	Planters	4	
23.40.05.21.21	Tree Grates	4	
23.40.05.21.24	Tree Grids	4	
23.40.10.00	Exterior Equipment and Furnishings	2	
23.40.10.11	Site Furnishings	3	
23.40.10.11.11	Bicycle Racks	4	
23.40.10.11.14	Exterior Seating	4	
23.40.10.11.17	Exterior Tables	4	
23.40.10.11.21	Trash Receptors	4	
23.40.10.11.24	Storage Specialties for Services and Maintenance	4	
23.40.10.14	Exterior Specialties	3	
23.40.10.14.11	Flagpoles	4	
23.40.10.14.11.11	Automatic Flagpoles	5	
23.40.10.14.11.14	Ground-Set Flagpoles	5	
23.40.10.14.11.17	Nautical Flagpoles	5	
23.40.10.14.11.21	Wall-Mounted Flagpoles	5	
23.40.10.14.14	Manufactured Exterior Specialties	4	
23.40.10.14.14.11	Weathervanes	5	
23.40.10.14.14.14	Clocks	5	
23.40.10.14.14.17	Cupolas	5	
23.40.10.14.14.21	Spires	5	
23.40.10.14.14.24	Steeples	5	
23.40.10.14.14.99	Other Manufactured Exterior Specialties	5	
23.40.10.14.17	Memorials and Statuary	4	
23.40.10.14.21	Markers and Monuments	4	
23.40.10.14.24	Exterior Signs	4	
23.40.10.14.24.11 	Signs, Finger Posts	4	
23.40.10.14.24.14	Street Nameplates	5	
23.40.10.14.24.17	Illuminated Signs	5	
23.40.10.14.27	Bollards 	4	
23.40.10.14.31	Public Lighting Columns	4	
23.40.10.17	Garden and Park Furniture	3	
23.40.10.17.11	Garden/Patio Seating and Tables	4	
23.40.10.17.14	Garden Umbrellas	4	
23.40.10.17.17	Exterior Ornamental Fountains	4	
23.40.10.17.21	Bird Houses and Feeders	4	
23.40.10.17.24	Bird Baths	4	
23.40.10.17.27	Tubs for Plants	4	
23.40.10.17.31	Sundials	4	
23.40.10.17.34	Garden Ornaments	4	
23.40.10.21	Playfield Equipment, Structures, and Surfacing	3	
23.40.10.21.11	Playground Equipment	4	
23.40.10.21.14	Play Structures	4	
23.40.10.21.17	Athletic or Recreation Screening	4	
23.40.10.21.17.11	Tennis Court Windbreakers	5	
23.40.10.21.21	External Pools and Ponds	4	
23.40.10.21.24	Athletic and Recreational Surfaces	4	
23.40.10.21.24.11	Sports Field Surfacings	5	
23.40.10.21.24.11.11	Baseball Field Surfacing	6	
23.40.10.21.24.11.14	Multi-Purpose Court Surfacing	6	
23.40.10.21.24.11.17	Resilient Matting	6	
23.40.10.21.24.11.21	Synthetic Grass Surfacing	6	
23.40.10.21.24.11.24	Synthetic Running Track Surfacing	6	
23.40.10.21.24.11.27	Tennis Court Surfacing	6	
23.40.10.21.24.14	Artificial Ski Slopes	5	
23.40.10.21.24.17	Artificial Ice Rinks	5	
23.40.10.21.27	Exterior Athletic Equipment	4	
23.40.10.21.27.11	Goalposts	5	
23.40.10.21.27.11.11	Soccer Goalposts	6	
23.40.10.21.27.11.14	Football Goalposts	6	
23.40.10.21.27.14	Tennis Court Nets	5	
23.40.10.21.27.17	Volley Ball Nets	5	
23.40.10.21.27.21	Basketball Net and Backstop	5	
23.40.10.24	Screening Devices	3	
23.40.10.24.11	Jet Blast Barriers	4	
23.40.10.24.14	Screens and Louvers	4	
23.40.10.24.21	Sound Barriers	4	
23.40.20.00	General Furniture and Specialties	2	
23.40.20.11	Wardrobe and Closet Specialties	3	
23.40.20.11.11	Wardrobes	4	
23.40.20.11.14	Chests of Drawers	4	
23.40.20.11.17	Lockers	4	
23.40.20.11.21	Racks and Hangers	4	
23.40.20.11.21.11	Coat Racks	5	
23.40.20.11.21.14	Hat Racks	5	
23.40.20.11.21.17	Shoe Trees	5	
23.40.20.11.21.21	Coat Hooks	5	
23.40.20.11.21.24	Coat Hangers and Rails	5	
23.40.20.11.24	Cloakroom Units	4	
23.40.20.11.27	Umbrella Stands	4	
23.40.20.11.31	Checkroom Equipment	4	
23.40.20.11.31.11	Manual Checkroom Equipment	5	
23.40.20.11.31.14	Automated Checkroom Equipment	5	
23.40.20.14	Residential Furniture	3	
23.40.20.14.14	Residential Seating	4	
23.40.20.14.14.11	Chairs	5	
23.40.20.14.14.14	Settees, Sofas	5	
23.40.20.14.14.17	Stools	5	
23.40.20.14.14.21	Benches	5	
23.40.20.14.14.24	Chaises Lounges	5	
23.40.20.14.14.27	Sofa Beds, Chair Beds	5	
23.40.20.14.17	Residential Tables and Cabinets	4	
23.40.20.14.17.11	Dining Room Tables	5	
23.40.20.14.17.14	China Cabinets	5	
23.40.20.14.17.17	Sideboards	5	
23.40.20.14.17.21	End Tables	5	
23.40.20.14.17.24	Coffee Tables	5	
23.40.20.17	Bedroom Furniture	3	
23.40.20.17.14	Bedroom Furniture, Single Units	4	
23.40.20.17.14.11	Beds	5	
23.40.20.17.14.14	Headboards, Footboards	5	
23.40.20.17.14.17	Cots, Cradles	5	
23.40.20.17.14.21	Bedside Units	5	
23.40.20.17.14.24	Dressing Tables	5	
23.40.20.17.14.27	Nursery/Children's Furniture	5	
23.40.20.17.14.31	Mattresses	5	
23.40.20.21	Toilet and Bath Specialties	3	
23.40.20.21.11	Bathroom Cabinets	4	
23.40.20.21.14	Hand and Hair Dryers	4	
23.40.20.21.17	Paper Towel Dispensers, Disposal Units	4	
23.40.20.21.21	Toilet Paper Dispensers	4	
23.40.20.21.24	Sanitary Napkin and Tampon Dispensers, Disposal Units	4	
23.40.20.21.27	Towel Bars	4	
23.40.20.21.31	Robe Hooks	4	
23.40.20.21.34	Soap Holders, Dispensers	4	
23.40.20.21.37	Diaper Changing Units	4	
23.40.20.21.41	Bathroom Deodorizers	4	
23.40.20.21.44	Shower Rods, Curtains	4	
23.40.20.21.47	Bath Grab Bars	4	
23.40.20.24	Non-Clothes Storage Furniture	3	
23.40.20.24.11	Cupboards	4	
23.40.20.24.14	Chests	4	
23.40.20.24.17	Sideboards	4	
23.40.20.24.21	Dressers	4	
23.40.20.24.24	Filing Cabinets	4	
23.40.20.24.27	Plan/Map Chests	4	
23.40.20.24.31	Desk	4	
23.40.20.24.34	Bookcases	4	
23.40.20.24.41	Key Hangers	4	
23.40.20.27	Storage Shelving	3	
23.40.20.27.11	Shelves	4	
23.40.20.27.14	Supports	4	
23.40.20.27.17	Racking	4	
23.40.20.27.21	Mobile Storage Units	4	
23.40.20.31	Refuse Disposal Furniture	3	
23.40.20.31.11	Bins	4	
23.40.20.31.14	Ash Trays	4	
23.40.20.31.17	Refuse Holders	4	
23.40.20.34	Fireplaces and Stoves 	3	
23.40.20.34.11	Fireplace and Stove Components 	4	
23.40.20.34.11.11	Fire Surrounds	5	
23.40.20.34.11.14	Firebacks	5	
23.40.20.34.11.17	Fireplace and Stove Fenders	5	
23.40.20.34.11.21	Fireplace and Stove Hoods	5	
23.40.20.34.14	Fireplaces	4	
23.40.20.34.14.11	Fireplace Inserts	5	
23.40.20.34.14.14	Fireplace Screens and Doors	5	
23.40.20.34.14.17	Fireplace Water Heaters	5	
23.40.20.34.17	Stoves	4	
23.40.20.34.17.11	Stove Pipe	5	
23.40.20.34.21	Hearths	4	
23.40.35.00	Casework	2	
23.40.35.11	Casework Components	3	
23.40.35.11.11	Cabinets	4	
23.40.35.11.14	Hardware	4	
23.40.35.11.17	Work Surfaces	4	
23.40.35.14	Casework by Type	3	
23.40.35.14.11	Modular Casework	4	
23.40.35.14.14	Custom-Fabricated Casework	4	
23.40.35.17	Casework by Purpose	3	
23.40.35.17.11	Bank Casework	4	
23.40.35.17.14	Hospitality Casework	4	
23.40.35.17.17	Display Casework	4	
23.40.35.17.21	Religious Casework	4	
23.40.35.17.24	Library Casework	4	
23.40.35.17.24.11	Study Carrels	5	
23.40.35.17.24.14	Book Stacks	5	
23.40.35.17.24.17	Periodical Racks	5	
23.40.35.17.27	Educational Casework	4	
23.40.35.17.31	Laboratory Casework	4	
23.40.35.17.34	Medical Casework	4	
23.40.35.17.34.11	Dental Casework	5	
23.40.35.17.34.14	Pharmacy Casework	5	
23.40.35.17.37	Mortuary Casework	4	
23.40.35.17.41	Commercial Kitchen Casework	4	
23.40.35.17.44	Darkroom Casework	4	
23.40.35.17.44.11	Photo Transfer Cabinets	5	
23.40.35.17.47	Residential Casework	4	
23.40.35.17.47.11	Kitchen Casework	5	
23.40.35.17.47.11.11	Complete Kitchen Casework Suites	6	
23.40.35.17.47.11.14	Single Kitchen Casework Units	6	
23.40.35.17.47.14	Bathroom Casework	5	
23.40.40.00	Food Service Equipment and Furnishings	2	
23.40.40.11	Specialized Food Storage and Display Furnishings	3	
23.40.40.11.11	Refrigerators and Freezers	4	
23.40.40.11.11.11	Refrigerators	5	
23.40.40.11.11.14	Freezers	5	
23.40.40.11.11.17	Refrigerator-Freezer 	5	
23.40.40.11.14	Food Storage Coolers	4	
23.40.40.11.14.11	Walk-In Coolers	5	
23.40.40.11.14.14	Display Coolers	5	
23.40.40.11.17	Refrigerated Cases	4	
23.40.40.11.21	Hot Cabinets	4	
23.40.40.11.24	Cold Cabinets	4	
23.40.40.11.27	Bottle Racks	4	
23.40.40.11.31	Steam Tables	4	
23.40.40.11.34	Snack Cabinets	4	
23.40.40.14	Food Service Equipment	3	
23.40.40.14.11	Food Delivery Carts and Conveyors	4	
23.40.40.14.11.11	Food Delivery Carts	5	
23.40.40.14.11.14	Food Delivery Conveyors	5	
23.40.40.14.14	Food Preparation Equipment	4	
23.40.40.14.14.11	Food Mixers	5	
23.40.40.14.14.14	Drink Making Equipment	5	
23.40.40.14.17	Food Cooking Equipment	4	
23.40.40.14.17.11	Cookers, Ovens, Stoves	5	
23.40.40.14.17.14	Hot Plates	5	
23.40.40.14.17.17	Ranges	5	
23.40.40.14.17.21	Grills	5	
23.40.40.14.17.24	Fryers	5	
23.40.40.14.17.27	Barbecues	5	
23.40.40.14.17.31	Small Specialized Cooking Equipment	5	
23.40.40.14.21	Hood and Ventilation Equipment	4	
23.40.40.14.21.11	Food Service Hoods	5	
23.40.40.14.21.14	Ventilation Equipment	5	
23.40.40.14.21.17	Fire Suppression Systems	5	
23.40.40.14.21.21	Catering Ventilation	5	
23.40.40.14.24	Food Dispensing Equipment	4	
23.40.40.14.24.11	Bar Equipment	5	
23.40.40.14.24.14	Service Line Equipment	5	
23.40.40.14.24.17	Soda Fountain Equipment	5	
23.40.40.14.27	Ice Machines	4	
23.40.40.14.31	Cleaning and Disposal Equipment	4	
23.40.40.17	Restaurant Furniture	3	
23.40.40.17.11	Bars and Serving Counters	4	
23.40.40.17.14	Restaurant Chairs	4	
23.40.40.17.17	Restaurant Tables	4	
23.40.40.17.21	Restaurant Booths	4	
23.40.40.17.24	Restaurant Seating Units	4	
23.40.40.17.27	Bar Stools	4	
23.40.50.00	Educational, Cultural Equipment and Furnishings	2	
23.40.50.11	Educational, Entertainment Equipment and Furnishings	3	
23.40.50.11.11	Auditorium Seating	4	
23.40.50.11.11.11	Fixed Audience Seating	5	
23.40.50.11.11.14	Portable Audience Seating	5	
23.40.50.11.11.14.11	Folding Audience Chairs	6	
23.40.50.11.11.14.14	Interlocking Audience Chairs	6	
23.40.50.11.11.14.17	Stacking Audience Chairs	6	
23.40.50.11.14	Classroom Furniture	4	
23.40.50.11.14.11	Seat and Table Assemblies	5	
23.40.50.11.14.14	Modular Desks	5	
23.40.50.11.17	Multiple-Use Fixed Seating	4	
23.40.50.11.21	Platforms	4	
23.40.50.11.21.11	Folding and Portable Stages	5	
23.40.50.11.24	Educational Play Equipment	4	
23.40.50.11.27	Language Laboratory Equipment	4	
23.40.50.14	Theater and Stage Equipment	3	
23.40.50.14.11	Acoustical Shells	4	
23.40.50.14.14	Rigging Systems and Controls	4	
23.40.50.14.17	Scenery Docks	4	
23.40.50.14.21	Suspension Systems	4	
23.40.50.14.24	Stage Curtains	4	
23.40.50.17	Planetarium Equipment and Furnishings	3	
23.40.50.17.11	Planetarium Projectors	4	
23.40.50.17.14	Planetarium Seating	4	
23.40.50.21	Observatory Equipment and Furnishings	3	
23.40.50.21.11	Telescopes	4	
23.40.50.24	Ecclesiastical Equipment and Furnishings	3	
23.40.50.24.11	Religious Seating, Pews, and Benches	4	
23.40.50.24.14	Chancel Furnishings	4	
23.40.50.24.14.11	Lecterns	5	
23.40.50.24.14.14	Pulpits	5	
23.40.50.24.14.17	Choir Screens	5	
23.40.50.24.14.21	Altars	5	
23.40.50.24.17	Baptisteries	4	
23.40.50.24.21	Baptismal Fonts	4	
23.40.50.24.24	Instrumental Equipment	4	
23.40.50.24.24.11	Organs, Organ Cases and Screens	5	
23.40.50.24.24.14	Bells	5	
23.40.50.24.24.17	Carillons	5	
23.40.50.24.27	Synagogue Furniture	4	
23.40.50.24.31	Mosque Furniture	4	
23.40.50.24.34	Temple Furniture	4	
23.40.50.27	Library and Archive Equipment and Furnishings	3	
23.40.50.27.11	Library Stack Systems	4	
23.40.50.27.11.11	Library Shelving	5	
23.40.50.27.14	Book Depositories	4	
23.40.50.27.17	Book Theft Protection Equipment	4	
23.40.50.27.21	Library Furniture	4	
23.40.50.27.21.11	Library Filing Furniture	5	
23.40.50.27.21.14	Library Display Furniture	5	
23.40.50.27.21.17	Study Carrels	5	
23.40.50.31	Exhibition Equipment and Furnishings	3	
23.40.50.31.11	Display Furniture	4	
23.40.50.31.11.11	Display Cabinets	5	
23.40.50.31.11.14	Display Racks	5	
23.40.50.31.11.17	Display Carousels	5	
23.40.50.31.14	Gallery Hanging Systems	4	
23.40.50.31.17	Stands, Pedestals	4	
23.40.50.31.21	Retail Cabinets	4	
23.40.50.31.24	Exhibition Stands, Shell Schemes	4	
23.40.50.31.27	Exhibit Equipment	4	
23.40.50.34	Athletic, Recreational, and Therapeutic Equipment	3	
23.40.50.34.11	Arcade Machines	4	
23.40.50.34.14	Gymnasium Equipment	4	
23.40.50.34.14.11	Backstops	5	
23.40.50.34.14.14	Scoreboards and Time Clocks	5	
23.40.50.34.14.17	Net Posts	5	
23.40.50.34.14.21	Floor Sockets	5	
23.40.50.34.14.24	Climbing Walls	5	
23.40.50.34.14.27	Climbing Ropes	5	
23.40.50.34.17	Gymnasium Dividers	4	
23.40.50.34.21	Fitness and Exercise Equipment	4	
23.40.50.34.24	Nets	4	
23.40.50.34.27	Bowling Alley Equipment	4	
23.40.50.34.31	Shooting Range Equipment	4	
23.40.50.34.34	Equipment Storage Racks	4	
23.40.50.34.37	Sauna and Steam Room Specialties 	4	
23.40.50.34.41	Solarium Specialties	4	
23.40.50.34.44	Therapeutic Equipment	4	
23.40.50.34.47	Spectator Stands, Seating	4	
23.40.50.34.47.11	Fixed Stadium and Arena Seating	5	
23.40.50.34.47.14	Telescoping Stands	5	
23.40.50.34.47.14.11	Telescoping Bleachers	6	
23.40.50.34.47.14.14	Telescoping Chair Platforms	6	
23.40.70.00	Work Environment Equipment and Furnishings	2	
23.40.70.11	Scientific and Medial Equipment and Furnishings	3	
23.40.70.11.11	Laboratory Equipment and Furnishings	4	
23.40.70.11.11.11	Laboratory Equipment	5	
23.40.70.11.11.11.11	Laboratory Service Fixtures	6	
23.40.70.11.11.11.14	Laboratory Fume Hoods	6	
23.40.70.11.11.11.17	Laboratory Incubators	6	
23.40.70.11.11.11.21	Laboratory Sterilizers	6	
23.40.70.11.11.11.24	Laboratory Refrigerators	6	
23.40.70.11.11.11.27	Laboratory Emergency Safety Appliances	6	
23.40.70.11.11.11.31	Laboratory Service Columns	6	
23.40.70.11.11.11.34	Laboratory Flammables Storage Cabinets	6	
23.40.70.11.11.14	Laboratory Furniture	5	
23.40.70.11.14	Health Care Equipment and Furnishings	4	
23.40.70.11.14.11	Medical Equipment	5	
23.40.70.11.14.11.11	Medical Sterilizing Equipment	6	
23.40.70.11.14.11.14	Examination and Treatment Equipment	6	
23.40.70.11.14.11.17	Patient Care Equipment	6	
23.40.70.11.14.11.17.11	Patient Hoists	7	
23.40.70.11.14.11.17.14	Hospital Head Boards	7	
23.40.70.11.14.11.17.17	Patient Beds	7	
23.40.70.11.14.11.21	Post-Mortem and Dissection Equipment	6	
23.40.70.11.14.11.24	Operating Room Equipment	6	
23.40.70.11.14.11.27	Radiology Equipment	6	
23.40.70.11.14.14	Dental Equipment	5	
23.40.70.11.14.17	Optical Equipment	5	
23.40.70.11.14.21	Health Care Furniture	5	
23.40.70.11.17	Mortuary Equipment	4	
23.40.70.11.17.11	Mortuary Refrigerators	5	
23.40.70.11.17.14	Crematorium Equipment	5	
23.40.70.11.17.17	Mortuary Lifts	5	
23.40.70.14	Retail and Commercial Equipment and Furnishings	3	
23.40.70.14.11	Hospitality Equipment and Furnishings	4	
23.40.70.14.14	Registration Equipment	4	
23.40.70.14.17	Checkroom Equipment	4	
23.40.70.14.21	Hospitality Furniture	4	
23.40.70.14.24	Hospitality Furnishings	4	
23.40.70.14.24.11	Hospitality Bath Furnishings	5	
23.40.70.14.24.11.11	Hospitality Bath Linens and Towels	6	
23.40.70.14.24.11.14	Hospitality Bath Mats	6	
23.40.70.14.24.11.17	Hospitality Shower Curtains	6	
23.40.70.14.24.14	Hospitality Bedroom Furnishings	5	
23.40.72.14.21	Hospitality Bed Linens	4	
23.40.72.14.22	Hospitality Pillows	4	
23.40.70.14.27	Mercantile Equipment and Furnishings	4	
23.40.70.14.31	Barber Shop Equipment	4	
23.40.70.14.34	Beauty Shop Equipment	4	
23.40.70.14.37	Cash Registers and Checkout Equipment	4	
23.40.70.14.41	Display Cases	4	
23.40.70.14.41.11	Refrigerated Display Cases	5	
23.40.70.14.44	Food Processing Equipment	4	
23.40.70.14.47	Food Weighing and Wrapping Equipment	4	
23.40.70.14.51	Display Casework	4	
23.40.70.14.54	Wall Display Systems	4	
23.40.70.14.57	Office Equipment and Furnishings	4	
23.40.70.14.57.11	Computers	5	
23.40.70.14.57.14	Printers	5	
23.40.70.14.57.17	Drafting Equipment	5	
23.40.70.14.57.21	Plotters	5	
23.40.70.14.57.24	Drawing Equipment	5	
23.40.70.14.61	Mailroom Case Goods	4	
23.40.70.14.64	Retail and Commercial Furnishings	4	
23.40.70.14.64.11	Office Furniture	5	
23.40.70.14.64.14	Retail and Commercial Seating Furniture	5	
23.40.70.14.64.17	Office Storage and Filing Furniture	5	
23.40.70.14.64.17.11	Lateral Filing Cabinets	6	
23.40.70.14.64.17.14	Vertical Filing Cabinets	6	
23.40.70.14.64.21	Systems Furniture	5	
23.40.70.14.64.21.11	Panel-Hung Component	6	
23.40.70.14.64.21.14	Free-Standing Component	6	
23.40.70.14.64.21.17	Beam System	6	
23.40.70.14.64.21.21	Desk System	6	
23.40.70.14.64.24	Office Accessories	5	
23.40.70.17	Industrial and Manufacturing Equipment and Furnishings	3	
23.40.70.17.11	Manufacturing Equipment 	4	
23.40.70.17.14	Manufacturing Furniture	4	
23.40.70.17.14.11	Flat Work Surface Furniture	5	
23.40.70.17.14.14	Work Stations 	5	
23.40.70.17.17	Shop Equipment	4	
23.40.70.17.21	Shop Furniture	4	
23.40.70.17.21.11	Counters and Work Surfaces	5	
23.40.70.17.21.14	Shop Display Specialties	5	
23.40.70.17.21.17	Shop Storage Fittings	5	
23.40.70.21	Other Work-Related Equipment and Furnishings	3	
23.40.70.21.11	Darkroom Equipment and Furnishings	4	
23.40.70.21.14	Darkroom Equipment	4	
23.40.70.21.14.11	Darkroom Processing Equipment	5	
23.40.70.21.17	Darkroom Specialties	4	
23.40.70.21.21	Vending Equipment	4	
23.40.70.21.24	Vending Machines	4	
23.40.70.21.27	Ticket Machines	4	
23.40.70.21.31	Change Machines	4	
23.40.70.24	Vehicle Service Equipment	3	
23.40.70.24.11	Compressed Air Vehicle Service Equipment	4	
23.40.70.24.14	Fuel Dispensing Equipment	4	
23.40.70.24.17	Vehicle Lubrication Equipment	4	
23.40.70.24.21	Tire Changing Equipment	4	
23.40.70.24.24	Vehicle Washing Equipment	4	
23.40.70.24.27	Vehicle Hoists	4	
23.40.70.27	Security and Vault Equipment and Furnishings	3	
23.40.70.27.11	Safes	4	
23.40.70.27.14	Safe Deposit Boxes	4	
23.40.70.27.17	Vault Doors and Day Gates	4	
23.40.70.27.21	Anti-Bandit Screens	4	
23.40.70.27.21.11	Gun Ports	5	
23.40.70.27.24	Teller and Service Equipment	4	
23.40.70.27.24.11	Automated Banking Systems	5	
23.40.70.27.24.14	Money Cart Pass-Through	5	
23.40.70.27.24.17	Package Transfer Units	5	
23.40.70.27.24.21	Service and Teller Window Units	5	
23.40.70.27.24.24	Teller Equipment Systems	5	
23.40.70.27.27	Secure Point of Sale Units/Tills	4	
23.40.70.27.27.11	Deal Drawers	5	
23.40.70.27.31	Key Security Cabinets	4	
23.40.70.27.34	Money Counting and Handling Equipment	4	
23.40.70.31	Detention Equipment and Furnishings	3	
23.40.70.31.11	Detention Enclosures	4	
23.40.70.31.14	Detention Furnishings and Specialties	4	
23.40.70.31.17	Detention Furniture	4	
23.40.70.34	Agricultural Equipment	3	
23.40.70.34.11	Milkers	4	
23.40.70.34.14	Stock Feeders	4	
23.40.70.34.17	Stock Waterers	4	
23.40.70.34.21	Waste Clean-Up Equipment	4	
23.40.90.00	Information and Communication Specialties	2	
23.40.90.11	Information Display Specialties	3	
23.40.90.11.11	Information Signs	4	
23.40.90.11.14	Lettering and Numerals	4	
23.40.90.11.17	Pin Boards	4	
23.40.90.11.21	Writing Boards	4	
23.40.90.11.24	Plaques	4	
23.40.90.11.27	Poster Display Units	4	
23.40.90.11.31	Notice Boards	4	
23.40.90.11.34	Display Screens	4	
23.40.90.11.37	Pictograms	4	
23.40.90.14	Communication Specialties	3	
23.40.90.14.11	Mail Boxes	4	
23.40.90.14.14	Mail Racks	4	
23.40.90.14.17	Pigeonholes	4	
23.40.90.14.21	Mail Trolleys	4	
23.40.90.14.24	Mail Handling Equipment	4	
23.40.90.14.27	Telephone Booths	4	
23.40.90.14.31	Acoustic Hoods	4	
23.40.90.14.34	Directory Boards	4	
23.40.95.00	Furnishings, Ornaments, and Decoration	2	
23.40.95.11	Soft Furnishings	3	
23.40.95.11.31	Movable or Retractable Screens	4	
23.40.95.14	Plant Display Furniture	3	
23.40.95.14.11	Decorative Planters	4	
23.40.95.14.14	Decorative Vases	4	
23.40.95.17	Ornaments and Decoration	3	
23.40.95.17.11	Interior Ornamental Fountains	4	
23.40.95.17.14	Ornaments	4	
23.40.95.17.17	Mirrors	4	
23.40.95.17.21	Ornamental Screens	4	
23.40.95.17.24	Artwork	4	
23.40.95.17.27	Clocks	4	
23.40.95.17.31	Wall Hangings	4	
23.45.00.00	Sanitary, Laundry, and Cleaning Equipment	1	
23.45.05.00	Sanitary Equipment	2	
23.45.05.14	Plumbing Fixtures - Sanitary Washing Units 	3	
23.45.05.14.11	Sanitary Washing Unit Components	4	
23.45.05.14.11.11	Splashbacks	5	
23.45.05.14.11.14	Bath Panels	5	
23.45.05.14.11.17	Shower/Bath Seats	5	
23.45.05.14.11.21	Shower Receptors	5	
23.45.05.14.11.24	Shower/Bath Screens, Curtains	5	
23.45.05.14.14	Sinks/Lavatories	4	
23.45.05.14.14.11	Sacristy	5	
23.45.05.14.14.14	Clinic Sinks	5	
23.45.05.14.14.17	Plaster Sinks	5	
23.45.05.14.14.21	Surgeons Scrub-Up Sinks	5	
23.45.05.14.14.24	Surgeons Instrument Sinks	5	
23.45.05.14.14.27	Service Sinks	5	
23.45.05.14.14.31	Darkroom Sinks	5	
23.45.05.14.14.34	Hairdressing Sinks	5	
23.45.05.14.17	Showers	4	
23.45.05.14.17.11	Shower Compartments	5	
23.45.05.14.17.14	Shower Receptors	5	
23.45.05.14.17.17	Group Showers	5	
23.45.05.14.21	Bathtubs	4	
23.45.05.14.21.11	Bath/Shower Units	5	
23.45.05.14.21.14	Sitz Baths	5	
23.45.05.14.21.17	Therapeutic Whirlpool Baths	5	
23.45.05.14.24	Eye Wash Fountains	4	
23.45.05.14.27	Bidets	4	
23.45.05.14.31	Combination Toilets	4	
23.45.05.14.31.11	Patients Combination Toilets	5	
23.45.05.14.31.14	Detention Combination Toilets	5	
23.45.05.14.34	Security Plumbing Fixtures	4	
23.45.05.14.37	Bedpan Washers/Sanitizers	4	
23.45.05.14.99	Other Sanitary Washing Plumbing Fixtures	4	
23.45.05.17	Sanitary Leisure Units	3	
23.45.05.17.11	Sauna Equipment	4	
23.45.05.17.14	Steam Room Equipment	4	
23.45.05.17.17	Leisure Whirlpools	4	
23.45.05.17.21	Hot Tubs	4	
23.45.05.21	Plumbing Fixtures - Sanitary Disposal Units 	3	
23.45.05.21.11	Water Closets 	4	
23.45.05.21.11.11	Water Operated Water Closets	5	
23.45.05.21.11.14	Chemical/Biological Sanitary Disposal Units	5	
23.45.05.21.11.21	Urinals	5	
23.45.05.21.11.24	Sanitary Macerators	5	
23.45.05.21.14	Sanitary Disposal Components	4	
23.45.05.21.14.11	Water Closet Seats	5	
23.45.05.21.14.14	Water Closet Tanks	5	
23.45.05.21.14.17	Sanitary Disposal Connectors	5	
23.45.30.00	Washing and Waste Disposal Equipment	2	
23.45.30.11	Residential Washing Equipment	3	
23.45.30.11.11	Residential Dishwashers	4	
23.45.30.11.14	Residential Waste Disposal Units	4	
23.45.30.14	Commercial Washing Equipment	3	
23.45.30.14.11	Commercial Dishwashers	4	
23.45.30.14.14	Commercial Waste Disposal Units	4	
23.45.30.14.21	High Pressure Washing Equipment	4	
23.45.30.17	Drain Boards	3	
23.45.55.00	Sanitary Faucets, Wastes	2	
23.45.55.11	Sanitary Components	3	
23.45.55.11.11	Plugs	4	
23.45.55.11.14	Chains	4	
23.45.55.11.17	Overflow Specialties	4	
23.45.55.14	Single Faucets	3	
23.45.55.17	Mixing Faucets	3	
23.45.55.21	Drains (Wastes)	3	
23.45.70.00	Laundry and Cleaning Equipment	2	
23.45.70.11	Laundry Equipment	3	
23.45.70.11.11	Residential Laundry Equipment	4	
23.45.70.11.11.11	Washing Machines	5	
23.45.70.11.11.14	Clothes Dryers	5	
23.45.70.11.14	Commercial Laundry Equipment	4	
23.45.70.11.14.11	Washing Machines	5	
23.45.70.11.14.14	Extractors	5	
23.45.70.11.14.17	Clothes Dryers	5	
23.45.70.11.14.21	Clothes Airers	5	
23.45.70.11.14.24	Ironing and Pressing Machines	5	
23.45.70.11.14.27	Laundry Folding Machines	5	
23.45.70.11.14.31	Commercial Clothes Lines	5	
23.45.70.11.14.34	Dry Cleaning Equipment	5	
23.45.70.14	Room Cleaning Equipment	3	
23.45.70.14.11	Vacuum Cleaning Systems	4	
23.45.70.14.14	Floor and Wall Cleaning	4	
23.45.70.14.17	Housekeeping Carts	4	
23.50.00.00	Conveying Systems & Material Handling	1	
23.50.05.00	Vertical Transportation	2	
23.50.05.11	Elevators	3	
23.50.05.11.11	Electric Traction Elevators	4	
23.50.05.11.11.11	Freight Electric Traction Elevators	5	
23.50.05.11.11.14	Passenger Electric Traction Elevators	5	
23.50.05.11.11.17	Residential Electric Traction Elevators	5	
23.50.05.11.11.21	Service Electric Traction Elevators	5	
23.50.05.11.14	Hydraulic Elevators	4	
23.50.05.11.14.11	Freight Hydraulic Elevators	5	
23.50.05.11.14.14	Passenger Hydraulic Elevators	5	
23.50.05.11.14.17	Residential Hydraulic Elevators	5	
23.50.05.11.14.21	Service Hydraulic Elevators	5	
23.50.05.11.17	Rack and Pinion Elevators	4	
23.50.05.11.21	Elevator Cabs	4	
23.50.05.11.24	Elevator Equipment and Controls	4	
23.50.05.11.24.11	Elevator Doors	5	
23.50.05.11.24.14	Elevator Controls	5	
23.50.05.11.27	Elevator Restoration Products	4	
23.50.05.14	Lifts	3	
23.50.05.14.11	Scissors Lifts	4	
23.50.05.14.14	Stair Elevators	4	
23.50.05.14.14.11	Inclined Platform Lifts	5	
23.50.05.14.17	Elevating Platforms	4	
23.50.05.14.17.11	Platform Lifts	5	
23.50.05.14.17.14	Sidewalk Lifts	5	
23.50.05.17	Escalators	3	
23.50.20.00	Horizontal Transportation	2	
23.50.20.11	Moving Walks	3	
23.50.20.14	People Movers	3	
23.50.20.17	Aircraft Passenger Loading	3	
23.50.20.17.11	Jetways	4	
23.50.20.17.14	Gangways	4	
23.50.20.21	Monorails	3	
23.50.30.00	Materials Handling	2	
23.50.30.11	Dumbwaiters	3	
23.50.30.11.11	Manual Dumbwaiters	4	
23.50.30.11.14	Electric Dumbwaiters	4	
23.50.30.11.17	Hydraulic Dumbwaiters	4	
23.50.30.14	Material Transport	3	
23.50.30.14.11	Automated Document Filing and Retrieval	4	
23.50.30.14.14	Automated Guided Vehicles	4	
23.50.30.14.14.11	Guided Vehicle Material Handling	5	
23.50.30.14.14.14	Track Vehicle Material Handling	5	
23.50.30.17	Postal Conveying	3	
23.50.30.21	Baggage Conveying and Dispensing	3	
23.50.30.24	Conveyors	3	
23.50.30.24.11	Conveyor Components 	4	
23.50.30.24.11.11	Conveyor Belts	5	
23.50.30.24.14	Belt Conveyors	4	
23.50.30.24.17	Bucket Conveyors	4	
23.50.30.24.21	Container Conveyors	4	
23.50.30.24.24	Hopper and Track Conveyors	4	
23.50.30.24.27	Monorail Conveyors	4	
23.50.30.24.31	Oscillating Conveyors	4	
23.50.30.24.34	Pneumatic Conveyors	4	
23.50.30.24.37	Roller Conveyors	4	
23.50.30.24.41	Scoop Conveyors	4	
23.50.30.24.44	Screw Conveyors	4	
23.50.30.24.47	Selective Vertical Conveyors	4	
23.50.30.34	Pneumatic Tubes	3	
23.50.30.34.11	Document Conveying Systems	4	
23.50.30.37	Hoists and Cranes	3	
23.50.30.37.11	Cranes	4	
23.50.30.37.11.11	Crane Rails	5	
23.50.30.37.11.14	Bridge Cranes	5	
23.50.30.37.11.14.11	Top-Running Overhead Cranes	6	
23.50.30.37.11.14.14	Underslung Overhead Cranes	6	
23.50.30.37.11.17	Gantry Cranes	5	
23.50.30.37.11.21	Jib Cranes	5	
23.50.30.37.11.24	Tower Cranes	5	
23.50.30.37.11.27	Mobile Cranes	5	
23.50.30.37.11.31	Derricks	5	
23.50.30.37.14	Fixed Hoists	4	
23.50.30.37.14.11	Air Powered Fixed Hoists	5	
23.50.30.37.14.14	Electric Fixed Hoists	5	
23.50.30.37.14.17	Manual Fixed Hoists	5	
23.50.30.37.17	Trolley Hoists	4	
23.50.30.37.17.11	Air Powered Trolley Hoists	5	
23.50.30.37.17.14	Electric Trolley Hoists	5	
23.50.30.37.17.17	Manual Trolley Hoists	5	
23.50.50.00	Turntables	2	
23.50.50.11	Restaurant Turntables	3	
23.50.50.14	Stage Turntables	3	
23.50.50.17	Exhibit and Display Turntables	3	
23.50.50.21	Vehicular Turntable	3	
23.50.55.00	Parking Systems	2	
23.50.55.11	Car Parking Systems	3	
23.50.70.00	Loading Dock Equipment	2	
23.50.70.11	Dock Bumpers/Seals	3	
23.50.70.14	Dock Levelers	3	
23.50.70.14.11	Powered Dock Levelers	4	
23.50.70.14.14	Manual Dock Levelers	4	
23.50.70.17	Dock Lifts	3	
23.50.70.17.11	Powered Dock Lifts	4	
23.50.70.17.14	Manual Dock Lifts	4	
23.50.70.21	Portable Ramps, Bridges, and Platforms	3	
23.50.70.24	Seals and Shelters	3	
23.50.70.27	Truck Restraints	3	
23.50.85.00	Scaffolding	2	
23.50.85.11	Suspended Scaffolding	3	
23.50.85.11.11	Beam Suspended Scaffolding	4	
23.50.85.11.14	Carriage Suspended Scaffolding	4	
23.50.85.11.17	Hook Suspended Scaffolding	4	
23.50.85.14	Rope Climbers	3	
23.50.85.14.11	Manual Rope Climbers	4	
23.50.85.14.14	Powered Rope Climbers	4	
23.50.85.17	Telescoping Platforms	3	
23.50.85.17.11	Electric and Battery Telescoping Platforms	4	
23.50.85.17.14	Pneumatic Telescoping Platforms	4	
23.50.85.21	Powered Scaffolding	3	
23.50.90.00	Building Maintenance Systems 	2	
23.50.90.11	Window Washing Systems	3	
23.50.90.14	Building Maintenance Cradles and Platforms	3	
23.50.90.17	Roof Trolley Systems	3	
23.50.90.21	Traveling Ladder Systems	3	
23.50.90.24	Ancillary Building Maintenance Items	3	
23.50.90.24.11	Safety Tracks	4	
23.50.90.24.14	Anchors for Building Maintenance	4	
23.50.90.27	Fall Arrest Systems	3	
23.55.00.00	Manufactured Structures	1	
23.55.10.00	Towers and Superstructures	2	
23.55.10.11	Industrial Breechings, Chimneys, and Stacks	3	
23.55.10.11.11	Breechings	4	
23.55.10.11.11.11	Fabricated Breechings and Accessories	5	
23.55.10.11.14	Chimney Shafts	4	
23.55.10.11.17	Chimney Linings	4	
23.55.10.11.21	Draft Control Devices	4	
23.55.10.11.24	Insulated Sectional Chimneys	4	
23.55.10.14	Towers	3	
23.55.10.14.11	Cooling Towers 	4	
23.55.10.14.14	Water Towers	4	
23.60.00.00	General Purpose: Services 	1	
23.60.10.00	General Measuring Instruments	2	
23.60.10.11	Temperature Measuring Instruments	3	
23.60.10.14	Pressure Measuring Instruments	3	
23.60.10.17	Flow Meters	3	
23.60.10.21	Concentration Measuring Instruments	3	
23.60.10.21.11	Humidity Concentration Measuring Instruments	4	
23.60.10.21.14	Carbon Dioxide (CO) Concentration Measuring Instruments	4	
23.60.10.21.17	Ozone Concentration Measuring Instruments	4	
23.60.10.21.21	Other Gas Concentration Measuring Instruments	4	
23.60.10.24	Heat Measuring Instruments	3	
23.60.10.27	Level Measuring Instruments	3	
23.60.10.31	Weighing Instruments	3	
23.60.30.00	General Pipework and Ductwork Products	2	
23.60.30.11	Pipework Products for General Use	3	
23.60.30.11.14	Pipework Fittings	4	
23.60.30.11.14.11	Water Hammer Arrestors	5	
23.60.30.11.14.14	Pipe Expansion Compensators	5	
23.60.30.11.17	Pipework/Ductwork Mechanical Fasteners/Supports	4	
23.60.30.14	Ducting and Wireways for General Use	3	
23.60.30.14.11	Underfloor Wireways	4	
23.60.30.14.14	Service Penetrations	4	
23.60.30.17	Manholes	3	
23.60.30.21	Pumps	3	
23.60.30.21.11	Pump Components 	4	
23.60.30.21.14	Manual Pumps	4	
23.60.30.21.17	Motor Pumps	4	
23.60.30.21.21	Pump Sets	4	
23.60.30.21.24	Booster Pumps	4	
23.60.30.24	Poles for Aerial Networks	3	
23.60.30.24.11	Utility Poles	4	
23.60.30.24.14	Lighting Poles and Standards	4	
23.60.30.24.17	Antenna Towers	4	
23.60.30.24.21	Transmission Towers	4	
23.60.50.00	General Purpose Controls	2	
23.60.50.11	Photoelectric Cells	3	
23.60.50.14	Infra Red and Other Remote Controls	3	
23.60.50.17	Hydraulic Controls	3	
23.60.50.21	Pneumatic Controls	3	
23.60.50.24	Electric Controls	3	
23.60.50.27	Digital Controls	3	
23.60.70.00	General Protection for Services	2	
23.60.70.11	Fireproofing for Services	3	
23.60.70.11.11	Fire Dampers	4	
23.60.70.14	Smoke Seals for Ductwork	3	
23.60.70.14.11	Smoke Dampers	4	
23.65.00.00	Supply and Distribution of Liquids and Gases	1	
23.65.05.00	Complete Supply, Storage and Distribution Systems	2	
23.65.05.11	Complete Systems for Supply, Storage and Distribution of Liquids	3	
23.65.05.11.11	Water Supply Systems	4	
23.65.05.11.14	Consumable Liquids Supply Systems	4	
23.65.05.11.17	Liquid Fuel Supply Systems	4	
23.65.05.11.21	Liquid Fire Suppression Systems	4	
23.65.05.11.99	Other Liquid Supply Systems	4	
23.65.05.14	Complete Systems for Supply, Storage and Distribution of Gases	3	
23.65.05.14.11	Steam Supply Systems	4	
23.65.05.14.14	Fuel Gas Supply Systems	4	
23.65.05.14.17	Medical Gases Supply Systems	4	
23.65.05.14.21	Gaseous Fire Suppression Systems	4	
23.65.05.14.99	Other Gas Supply Systems	4	
23.65.20.00	Storage Vessels for Supplied Liquids and Gases	2	
23.65.20.11	Storage Vessels for Liquids	3	
23.65.20.11.11	Liquid Storage Components 	4	
23.65.20.11.11.11	Overflow Regulators	5	
23.65.20.11.11.14	Fill and Valve Caps	5	
23.65.20.11.11.17	Vents for Liquid Storage Tanks	5	
23.65.20.11.14	Rainwater Tanks	4	
23.65.20.11.17	Supply Water Tanks	4	
23.65.20.11.21	Consumable Liquid Storage Vessels	4	
23.65.20.11.24	Liquid Fuel Storage Vessels	4	
23.65.20.11.24.11	Fuel Oil Pre-Heaters	5	
23.65.20.11.27	Other Liquid Storage Vessels	4	
23.65.20.14	Storage Vessels for Gases	3	
23.65.20.14.11	Vacuum/Pressurized Air Storage Vessels	4	
23.65.20.14.14	Steam Storage Vessels	4	
23.65.20.14.17	Medical Gases Storage Vessels	4	
23.65.20.14.21	Fuel Gas and LPG Storage Vessels	4	
23.65.20.14.24	Other Gas Storage Vessels	4	
23.65.35.00	Heaters for Supplied Liquids 	2	
23.65.35.11	Supply Water Heaters 	3	
23.65.35.11.11	Storage Water Heaters 	4	
23.65.35.11.14	Instantaneous Water Heaters	4	
23.65.35.11.17	Thermodynamic Water Heaters	4	
23.65.35.99	Heaters for Other Supplied Liquids	3	
23.65.50.00	Treatment of Supplied Liquids/Gases	2	
23.65.50.11	Water Treatment	3	
23.65.50.11.11	Water Treatment Components	4	
23.65.50.11.11.11	Water Filters	5	
23.65.50.11.11.14	Water Softeners	5	
23.65.50.11.11.17	Magnetic/Electronic Water Treatment	5	
23.65.50.11.11.21	Sterilizers	5	
23.65.50.11.11.24	Salinators	5	
23.65.50.11.11.27	Chlorinators	5	
23.65.50.11.11.31	Ionizers, Ozone Treatment	5	
23.65.50.11.11.34	Additives for Water Treatment	5	
23.65.50.11.14	Packaged Water Treatment Systems	4	
23.65.55.00	Distribution of Supplied Liquids/Gases	2	
23.65.55.11	Supply Pumps and Compressors	3	
23.65.55.11.11	Gas Compressors/Vacuum Pumps	4	
23.65.55.14	Valves for Liquid Services	3	
23.65.55.14.11	Inlet/Outlet Valves for Liquid Services	4	
23.65.55.14.11.11	Fill Valves for Liquid Services	5	
23.65.55.14.11.14	Bleeding Valves for Liquid Services	5	
23.65.55.14.11.17	Overflow Valves for Liquid Services	5	
23.65.55.14.14	Isolation Valves for Liquid Services	4	
23.65.55.14.17	Adjusting/Controlling Valves for Liquid Services	4	
23.65.55.14.21	Non-Return Valves for Liquid Services	4	
23.65.55.14.24	Mixing Valves for Liquid Services	4	
23.65.55.17	Valves for Gas Supply Services	3	
23.65.55.17.11	Inlet/Outlet Valves for Gas Supplies	4	
23.65.55.17.11.11	Steam Outlet Valves	5	
23.65.55.17.14	Isolation Valves for Gas Supplies	4	
23.65.55.17.17	Adjusting/Controlling Valves for Gas Supplies	4	
23.65.55.17.21	Non-Return Valves for Gas Supplies	4	
23.65.70.00	Terminals for Supplied Liquids and Gases	2	
23.65.70.11	Fixtures for Supplied Liquids and Gases	3	
23.65.70.11.11	Fixtures for Liquids	4	
23.65.70.11.14	Gas Service Fixtures	4	
23.65.70.14	Fountains	3	
23.65.70.14.11	Drinking Fountains/Coolers	4	
23.65.70.14.11.11	Security Drinking Fountains/Coolers	5	
23.65.70.17	Fire Fighting Terminals	3	
23.65.70.17.11	Fire Fighting Terminal Components	4	
23.65.70.17.11.11	Fire Hydrants	5	
23.65.70.17.11.14	Fire Hose Reels	5	
23.65.70.17.11.17	Fire Hoses	5	
23.65.70.17.11.21	Fire Fighting Gas Terminals	5	
23.65.70.17.11.24	Fire Fighting Sprinkler Heads	5	
23.65.70.17.11.27	Cabinets for Fire Hoses	5	
23.65.70.17.11.31	Fire Fighting Media 	5	
23.65.70.17.14	Water Fire Fighting Terminals	4	
23.65.70.17.17	Gaseous Fire Fighting Terminals	4	
23.65.70.17.21	Foam Fire Fighting Terminals	4	
23.65.70.17.24	Powder Fire Fighting Terminals	4	
23.65.70.17.27	Fire Extinguishers	4	
23.70.00.00	Waste Management	1	
23.70.30.00	Solid Waste Handling Products  	2	
23.70.30.11	Solid Waste Impelling Equipment	3	
23.70.30.14	Solid Waste Treatment Equipment	3	
23.70.30.14.11	Solid Waste Compactors, Destructors, and Balers	4	
23.70.30.14.14	Solid Waste Crushers	4	
23.70.30.14.17	Solid Waste Pulping Machines	4	
23.70.30.14.21	Solid Waste Shredding Machines	4	
23.70.30.14.24	Pneumatic Waste Equipment	4	
23.70.30.14.27	Incinerators	4	
23.70.30.14.27.11	Solid Waste Incinerators	5	
23.70.30.14.27.14	Packaged Incinerators	5	
23.70.30.14.31	Recycling Equipment	4	
23.70.30.17	Solid Waste Monitoring and Control Equipment	3	
23.70.30.17.11	Solid Waste Metal Detectors	4	
23.70.30.17.14	Solid Waste Detectors for Other Solids	4	
23.70.30.21	Solid Waste Collection and Removal Products	3	
23.70.30.21.11	Complete Solid Waste Removal Systems	4	
23.70.30.21.14	Solid Waste Bins	4	
23.70.30.21.17	Gravity Chute Solid Waste Systems	4	
23.70.30.21.21	Refuse Disposal Chutes	4	
23.70.30.21.21.11	Refuse Hoppers	5	
23.70.30.21.21.14	Refuse Chute Doors	5	
23.70.30.21.21.17	Refuse Chute Decontamination Units	5	
23.70.30.24	Solid Waste Handling Systems	3	
23.70.30.24.11	Refuse Compactors	4	
23.70.30.24.14	Refuse Containers	4	
23.70.30.24.17	Dust Collectors	4	
23.70.50.00	Liquid Waste Handling Services	2	
23.70.50.11	Pumps for Liquid Waste	3	
23.70.50.11.11	Surface Waste Water Pumps	4	
23.70.50.11.14	Sewage and Sludge Pumps	4	
23.70.50.11.14.11	Oil-Water Separators	5	
23.70.50.11.14.14	Packaged Sewage and Sludge Pump Stations	5	
23.70.50.11.14.17	Sewage Ejectors	5	
23.70.50.11.17	Combined Macerator-Pumps	4	
23.70.50.14	Liquid Waste Treatment	3	
23.70.50.14.11	Packaged Sewage Treatment Plants	4	
23.70.50.14.14	General Waste Water Treatment Equipment	4	
23.70.50.14.14.11	Grit Collecting Equipment	5	
23.70.50.14.14.14	Screening and grinding Equipment	5	
23.70.50.14.14.17	Sedimentation Tank Equipment	5	
23.70.50.14.14.21	Scum Removal Equipment	5	
23.70.50.14.14.24	Chemical Equipment	5	
23.70.50.14.14.27	Sludge Handling and Treatment Equipment	5	
23.70.50.14.14.31	Filter Underdrains and Media	5	
23.70.50.14.14.31.11	Filter Bottoms	6	
23.70.50.14.14.31.14	Filter Media	6	
23.70.50.14.14.31.17	Package Filters	6	
23.70.50.14.14.34	Filter Press Equipment	5	
23.70.50.14.14.37	Trickling Filter Equipment	5	
23.70.50.14.17	Other Waste Water Treatment Equipment	4	
23.70.50.14.17.11	Waste Water Compressors	5	
23.70.50.14.17.14	Waste Water Aeration Equipment	5	
23.70.50.14.17.17	Waste Water Oxygenation Systems	5	
23.70.50.14.17.17.11	Waste Water Oxygen Dissolution System	6	
23.70.50.14.17.17.14	Waste Water Oxygen Generators	6	
23.70.50.14.17.17.17	Waste Water Oxygen Storage Facility	6	
23.70.50.14.17.21	Sludge Digestion Equipment	5	
23.70.50.14.17.21.11	Sludge Conditioning Systems	6	
23.70.50.14.17.21.14	Sludge Incinerators	6	
23.70.50.14.17.24	Digester Mixing Equipment	5	
23.70.50.14.17.24.11	Digester Covers and Appurtenances	6	
23.70.50.14.17.24.11.11	Fixed Digester Covers	7	
23.70.50.14.17.24.11.14	Floating Digester Covers	7	
23.70.50.14.17.24.11.17	Gasholder Covers	7	
23.70.50.14.21	Septic Tank Systems	4	
23.70.50.14.21.11	Drainage Field	5	
23.70.50.14.21.14	Grease Interceptor	5	
23.70.50.14.21.17	Sand Filter	5	
23.70.50.14.21.21	Septic Tank	5	
23.70.50.14.21.24	Siphon Tank	5	
23.70.50.14.24	Bacterial Filter Tanks	4	
23.70.50.14.27	Liquid Waste Decanters	4	
23.70.50.14.31	Liquid Waste Separators	4	
23.70.50.17	Liquid Waste Monitoring and Control	3	
23.70.50.17.11	Detectors of Water Pollution	4	
23.70.50.21	Liquid Waste Collection and Removal	3	
23.70.50.21.24	Waste Water Drains	4	
23.70.50.21.24.11	Roof Waste Water Drains	5	
23.70.50.21.24.14	Deck Waste Water Drains	5	
23.70.50.21.27	Drainage Pipes, Couplings, Collectors	4	
23.70.50.21.31	Pipework Access Fittings	4	
23.70.50.21.34	French Drain	4	
23.70.50.21.37	Valves for Removal Systems	4	
23.70.50.21.37.11	Air Inlet Valves for Removal Systems	5	
23.70.50.21.37.14	Non-Return Valves for Removal Systems	5	
23.70.50.24	Rainwater Removal	3	
23.70.50.24.11	Roof Gutters/Eavestroughs	4	
23.70.50.24.14	Downspouts	4	
23.70.50.24.14.11	Mechanical Fasteners for Downspouts	5	
23.70.50.24.14.14	Downspout Strainers	5	
23.70.50.24.17	Siphonic Drains	4	
23.70.70.00	Gaseous Waste Handling Services	2	
23.70.70.11	Gaseous Waste Impelling Equipment	3	
23.70.70.11.11	Flue Booster Fans	4	
23.70.70.11.14	Flue Dilution Fans	4	
23.70.70.11.17	Fume Extractor Fans	4	
23.70.70.14	Gaseous Waste Treatment	3	
23.70.70.14.11	Flue Gas Purifiers	4	
23.70.70.17	Gaseous Waste Monitoring and Control	3	
23.70.70.17.11	Air Pollution Detectors	4	
23.70.70.17.14	Flue Gas Analyzers	4	
23.70.70.21	Gaseous Waste Removal	3	
23.70.70.21.11	Complete Gaseous Waste Handling Systems	4	
23.70.70.21.14	Complete Flue and Chimney Systems	4	
23.70.70.21.14.11	Gas Vents	5	
23.70.70.21.14.14	Fabricated Stacks	5	
23.70.70.21.14.17	Fabricated Breechings and Accessories	5	
23.70.70.21.14.21	Insulated Sectional Chimneys	5	
23.70.70.21.17	Flue and Chimney Systems Components	4	
23.70.70.21.17.11	Draft Control Devices	5	
23.70.70.21.17.14	Fireplace Lintels	5	
23.70.70.21.17.17	Flue Linings	5	
23.70.70.21.17.21	Flue Caps, Cowls	5	
23.70.70.21.17.24	Access Panels for Chimneys	5	
23.70.70.21.17.27	Dampers for Chimneys	5	
23.70.70.21.17.31	Fire Shutter Extinguishers	5	
23.75.00.00	Climate Control (HVAC)	1	
23.75.10.00	Transformation and Conversion of Energy	2	
23.75.10.11	Central Heat Generators	3	
23.75.10.11.14	Hot Water Heat Generators	4	
23.75.10.11.14.11	Cast-Iron Boilers	5	
23.75.10.11.14.14	Condensing Boilers	5	
23.75.10.11.14.17	Finned Water-Tube Boilers	5	
23.75.10.11.14.21	Firebox Heating Boilers	5	
23.75.10.11.14.24	Flexible Water-Tube Boilers	5	
23.75.10.11.14.27	Pulse Combustion Boilers	5	
23.75.10.11.14.31	Scotch Marine Boilers	5	
23.75.10.11.14.34	Steel Water-Tube Boilers	5	
23.75.10.11.17	Warm Air Heat Generators	4	
23.75.10.11.17.11	Furnaces	5	
23.75.10.11.17.11.11	Electric-Resistance Furnaces	6	
23.75.10.11.17.11.14	Fuel-Fired Furnaces	6	
23.75.10.11.21	Steam Heat Generators	4	
23.75.10.11.24	Heat Generators, Thermal Liquid	4	
23.75.10.11.27	Fuel Burners	4	
23.75.10.11.27.11	Fuel Oil Filters	5	
23.75.10.11.27.14	Nozzles	5	
23.75.10.11.27.17	Burner Controls	5	
23.75.10.11.31	Solid Fuel Transport and Handling Equipment	4	
23.75.10.11.34	Fuel Gas Heat Recovery Devices	4	
23.75.10.14	Independent Electric Heating Units	3	
23.75.10.14.11	Electric Convectors	4	
23.75.10.14.11.11	Static Convectors	5	
23.75.10.14.11.14	Fan Convectors	5	
23.75.10.14.14	Electric Radiators	4	
23.75.10.14.14.11	Storage Heaters	5	
23.75.10.14.14.14	Infrared Radiators/Plates	5	
23.75.10.14.14.17	Ultraviolet Radiators	5	
23.75.10.14.14.21	Electric Heated Towel Bars	5	
23.75.10.14.14.24	Electric Heated Ceiling Panels	5	
23.75.10.14.14.27	Portable Radiators	5	
23.75.10.14.17	Electric Surface Heating Products	4	
23.75.10.14.17.11	Heating Sheets for Walls and Ceilings	5	
23.75.10.14.17.14	Heating Sheets for Glazing	5	
23.75.10.14.17.17	Pipe Heating Tapes/Cable Heating Trace	5	
23.75.10.14.21	Embedded Electric Heating Appliances	4	
23.75.10.14.21.11	Heating Sheets	5	
23.75.10.14.21.14	Heating Cables	5	
23.75.10.17	Non-Electric Local Heating Units 	3	
23.75.10.17.11	Non-Electric Stoves	4	
23.75.10.17.14	Fuel-Fired Heaters	4	
23.75.10.17.14.11	Fuel-Fired Duct Heaters	5	
23.75.10.17.14.14	Fuel-Fired Radiant Heaters	5	
23.75.10.17.14.17	Fuel-Fired Unit Heaters	5	
23.75.10.17.14.21	Fuel-Fired Air Heaters	5	
23.75.10.17.14.24	Fuel-Fired Domestic Heaters	5	
23.75.10.17.17	Combined Heating/Cooking Units	4	
23.75.10.17.17.11	Heat Pumps, Heating Function	5	
23.75.10.17.17.14	Heat Pumps, Cooling Function	5	
23.75.10.17.17.17	Heat Pumps, Heating-Cooling Function	5	
23.75.10.21	Heat Pumps	3	
23.75.10.21.11	Air-Source Heat Pumps	4	
23.75.10.21.14	Rooftop Heat Pumps	4	
23.75.10.21.17	Water-Source Heat Pumps	4	
23.75.10.24	Cooling and Freeze Plant	3	
23.75.10.24.11	Chilled Water Plant	4	
23.75.10.24.14	Refrigeration Plant	4	
23.75.10.24.17	Cold Room Plant	4	
23.75.10.24.21	Cooling and Freeze Components	4	
23.75.10.24.21.11	Refrigerant Condensing Units	5	
23.75.10.24.21.11.11	Packaged Refrigerant Condensing Coils and Fan Units	6	
23.75.10.24.21.11.14	Refrigerant Condensing Coils	6	
23.75.10.24.21.14	Refrigerant Evaporators	5	
23.75.10.24.21.17	Refrigerant Compressors	5	
23.75.10.24.21.17.11	Centrifugal Refrigerant Compressors	6	
23.75.10.24.21.17.14	Reciprocating Refrigerant Compressors	6	
23.75.10.24.21.17.17	Rotary-Screw Refrigerant Compressors	6	
23.75.10.24.21.21	Packaged Water Chillers	5	
23.75.10.24.21.21.11	Absorption Water Chillers	6	
23.75.10.24.21.21.14	Centrifugal Water Chillers	6	
23.75.10.24.21.21.17	Reciprocating Water Chillers	6	
23.75.10.24.21.21.21	Rotary-Screw Water Chillers	6	
23.75.10.24.21.24	Liquid Coolers and Evaporative Condensers	5	
23.75.10.24.21.27	Unitary Air Conditioning Equipment	5	
23.75.10.24.21.27.11	Packaged Air Conditioners	6	
23.75.10.24.21.27.14	Packaged Rooftop Air Conditioning Units	6	
23.75.10.24.21.27.17	Packaged Rooftop Make-Up Air Conditioning Units	6	
23.75.10.24.21.27.21	Packaged Terminal Air Conditioning Units	6	
23.75.10.24.21.27.24	Room Air Conditioners	6	
23.75.10.24.21.27.27	Split System Air Conditioning Units	6	
23.75.10.24.21.31	Cooling/Freeze Plant Accessories	5	
23.75.10.24.21.31.11	Refrigerant Liquid	6	
23.75.10.27	Solar Collectors	3	
23.75.10.27.11	Solar Collectors, Complete Systems	4	
23.75.10.27.11.11	Packaged Solar Equipment	5	
23.75.10.27.14	Solar Collector Components 	4	
23.75.10.27.14.11	Solar Absorber Plates or Tubing	5	
23.75.10.27.14.14	Solar Coatings and Surface Treatment	5	
23.75.10.27.14.17	Solar Collector Insulation	5	
23.75.10.27.14.21	Solar Glazing	5	
23.75.10.27.14.24	Solar Housing and Framing	5	
23.75.10.27.14.27	Solar Reflectors	5	
23.75.10.27.17	Solar Collector Units	4	
23.75.10.27.17.11	Solar Flat Plate Collectors	5	
23.75.10.27.17.14	Solar Concentrating Collectors	5	
23.75.10.27.17.17	Solar Vacuum Tube Collectors	5	
23.75.10.27.17.21	Heat Exchangers, Tubular	5	
23.75.10.27.17.24	Heat Exchangers, Plate	5	
23.75.10.27.17.27	Heat Exchangers, Rotary	5	
23.75.10.27.21	Photovoltaic Collectors	4	
23.75.10.31	Wind Energy Equipment	3	
23.75.10.34	Energy Recovery Equipment	3	
23.75.10.34.11	Energy Storage Tanks	4	
23.75.10.34.14	Heat Pipe	4	
23.75.10.34.17	Heat Wheels	4	
23.75.10.34.21	Heat Exchangers for Ventilation Air	4	
23.75.10.37	Cooling Towers	3	
23.75.10.37.11	Mechanical-Draft Cooling Towers	4	
23.75.10.37.14	Natural-Draft Cooling Towers	4	
23.75.35.00	Impelling Equipment	2	
23.75.35.14	Air Handling Units	3	
23.75.35.14.11	Built-Up Indoor Air Handling Units	4	
23.75.35.14.14	Customized Rooftop Air Handling Units	4	
23.75.35.14.17	Modular Indoor Air Handling Units	4	
23.75.35.14.21	Modular Rooftop Air Handling Units	4	
23.75.35.17	Fans	3	
23.75.35.17.11	Fans for Air Ductwork	4	
23.75.35.17.14	Fans, Single Units	4	
23.75.35.17.17	Room Air Circulation Fans	4	
23.75.35.17.17.11	Ceiling Fans	5	
23.75.35.17.21	Air Curtains	4	
23.75.35.17.24	Axial Fans	4	
23.75.35.17.27	Centrifugal Fans	4	
23.75.35.21	Extractors	3	
23.75.35.21.11	Emergency Smoke Extractors	4	
23.75.35.21.14	Extractors for Process Air	4	
23.75.35.21.17	Industrial Ventilating Equipment	4	
23.75.35.21.21	Power Ventilators	4	
23.75.50.00	Energy Treatment 	2	
23.75.50.11	Treatment of Circulation Liquids	3	
23.75.50.11.14	Feedwater Equipment	4	
23.75.50.11.14.11	Boiler Feedwater Pumps	5	
23.75.50.11.14.14	Deaerators	5	
23.75.50.11.14.17	Packaged Deaerator and Feedwater Equipment	5	
23.75.50.14	Steam Treatment	3	
23.75.50.14.11	Steam Dryers	4	
23.75.50.17	Supply Air Treatment	3	
23.75.50.17.11	Air Filters	4	
23.75.50.17.11.11	Air Filter Components 	5	
23.75.50.17.11.11.11	Air Filter Media	6	
23.75.50.17.11.14	High-Efficiency Air Filters	5	
23.75.50.17.11.17	ULPA Filters	5	
23.75.50.17.11.21	HEPA Filters	5	
23.75.50.17.14	Dust Collectors	4	
23.75.50.17.17	Electronic Air Cleaners	4	
23.75.50.17.21	Air Humidifiers	4	
23.75.50.17.24	Dehumidifiers	4	
23.75.50.17.24.11	Swimming Pool Dehumidification Units	5	
23.75.50.17.27	Air Fresheners	4	
23.75.50.17.31	Clean Room Air Treatment	4	
23.75.65.00	Monitoring and Control Equipment	2	
23.75.65.11	Monitoring and Control of Internal Climate 	3	
23.75.65.11.11	Heating Controllers	4	
23.75.65.11.14	Heating Programmers	4	
23.75.65.11.17	Heating Optimizers/Economizers	4	
23.75.65.14	Industrial Plant Performance Controls	3	
23.75.65.14.14	Centralized Plant Controls	4	
23.75.65.14.14.11	Temperature Controls	5	
23.75.65.14.14.14	Pressure Controls	5	
23.75.65.14.14.17	Flow Controls	5	
23.75.65.14.14.21	Concentration Controls	5	
23.75.65.14.17	Control and Monitoring Boards/Panels	4	
23.75.70.00	HVAC Distribution Devices	2	
23.75.70.11	Circulation Pipe Fittings	3	
23.75.70.11.11	Distribution Collectors	4	
23.75.70.11.14	Expansion Vessels	4	
23.75.70.11.14.11	Air Ducts	5	
23.75.70.11.14.14	Dampers for Air Ductwork	5	
23.75.70.11.14.17	Fire Shutters for Air Ductwork	5	
23.75.70.11.14.21	Guide Vanes	5	
23.75.70.11.14.24	Air Mixers	5	
23.75.70.11.14.27	Sound Attenuators	5	
23.75.70.14	Air Ductwork	3	
23.75.70.14.11	Access Fittings for Air Ductwork	4	
23.75.70.14.14	Couplings for Air Ductwork	4	
23.75.70.14.17	Hangers and Supports, Mechanical Fasteners for Air Ductwork	4	
23.75.70.14.21	Fibrous Glass Ducts	4	
23.75.70.14.24	Flexible Ducts	4	
23.75.70.14.27	Glass-Fiber-Reinforced Plastic Ducts	4	
23.75.70.14.31	Metal Ducts	4	
23.75.70.14.34	Air Duct Accessories	4	
23.75.70.17	Water Heated and Cooled Terminal Heating and Cooling Units	3	
23.75.70.17.11	Radiators	4	
23.75.70.17.14	Convectors	4	
23.75.70.17.17	Radiation Panels	4	
23.75.70.17.21	Embedded Water Heating Terminals	4	
23.75.70.17.24	Finned-Tube Radiation	4	
23.75.70.17.27	Fan Coil Units	4	
23.75.70.17.31	Induction Units	4	
23.75.70.17.34	Unit Heaters	4	
23.75.70.17.37	Unit Ventilators	4	
23.75.70.17.41	Water Heated Towel Bars	4	
23.75.70.21	Terminals for Air	3	
23.75.70.21.11	Supports, Mechanical Fasteners	4	
23.75.70.21.14	Coil Units	4	
23.75.70.21.17	Air Curtains	4	
23.75.70.21.21	Local Air-Conditioning Units	4	
23.75.70.21.24	Air Terminal Units	4	
23.75.70.21.24.11	Constant Volume Air Terminal Units	5	
23.75.70.21.24.14	Variable Volume Air Terminal Units	5	
23.75.70.21.27	Air Outlets and Inlets	4	
23.75.70.21.27.11	Diffusers, Registers, and Grilles	5	
23.75.70.21.27.14	Gravity Ventilators	5	
23.75.70.21.27.17	Intake and Relief Ventilators	5	
23.75.70.21.27.21	Penthouse Ventilators	5	
23.75.70.21.31	Exhaust Terminals	4	
23.80.00.00	Electric Power and Lighting	1	
23.80.10.00	Generation and Transformation Equipment	2	
23.80.10.11	Electrical Generators	3	
23.80.10.11.11	Electrical Generators, Single Units	4	
23.80.10.11.11.11	Engine Generators	5	
23.80.10.11.11.14	Motor Generators	5	
23.80.10.11.14	Driven Electrical Generator Sets	4	
23.80.10.11.14.11	Driving Units	5	
23.80.10.11.14.14	Electricity Generation Units	5	
23.80.10.11.17	Frequency Changers	4	
23.80.10.11.21	Rotary Converters	4	
23.80.10.11.24	Rotary Uninterruptible Power Units	4	
23.80.10.14	Transformers	3	
23.80.10.14.11	Power Transformers	4	
23.80.10.14.14	Current Transformers	4	
23.80.10.14.17	Safety Transformers	4	
23.80.10.14.21	Transformer Accessories	4	
23.80.10.14.21.11	Transformer Commutators	5	
23.80.10.14.21.14	Transformer Ballasts	5	
23.80.10.17	Static Power Converters	3	
23.80.10.17.11	Static Rectifiers	4	
23.80.10.17.14	Ondulators	4	
23.80.10.17.17	Combined Converter Sets	4	
23.80.10.17.21	Battery Chargers	4	
23.80.10.17.24	Direct Current (DC) Drive Controllers	4	
23.80.10.17.27	Slip Controllers	4	
23.80.10.17.31	Static Frequency Converters	4	
23.80.10.17.34	Static Uninterruptible Power Supplies	4	
23.80.10.17.37	Variable Frequency Controllers	4	
23.80.10.21	Electric Motors	3	
23.80.10.21.11	Direct Current (DC) Motors	4	
23.80.10.21.14	Alternating Current (AC) Motors	4	
23.80.10.24	Power Storage	3	
23.80.10.24.11	Batteries	4	
23.80.10.24.11.11	Battery Racks	5	
23.80.10.24.11.14	Central Battery Equipment	5	
23.80.10.24.14	Battery Chargers	4	
23.80.10.24.17	Uninterrupted Power Supply (UPS) Units	4	
23.80.25.00	Measuring and Recording Devices	2	
23.80.25.11	Electrical Meters	3	
23.80.25.11.11	Power Meters	4	
23.80.25.11.14	Voltage Meters	4	
23.80.25.11.17	Resistance Meters	4	
23.80.25.11.21	Frequency Meters	4	
23.80.25.11.24	Multi-Meters	4	
23.80.25.14	Electrical Energy Recording Devices	3	
23.80.25.14.11	Watt-Hour Recorders (Electricity Usage Meters)	4	
23.80.30.00	Distribution Devices	2	
23.80.30.11	Power Supply Devices	3	
23.80.30.11.11	Main Switches	4	
23.80.30.11.14	Inverters	4	
23.80.30.11.17	Distribution Boards and Control Panels	4	
23.80.30.11.21	Photoelectric Cells	4	
23.80.30.14	Power Distribution	3	
23.80.30.14.24	Junction Boxes	4	
23.80.30.17	Conduit, Wireways, and Ducts	3	
23.80.30.17.11	Conduits	4	
23.80.30.17.14	Wireways 	4	
23.80.30.17.17	Cable Trays and Horizontal Racks	4	
23.80.30.17.21	Cable Reels	4	
23.80.30.17.24	Mechanical Fasteners for Conduits and Trunking	4	
23.80.30.24	Switchgear	3	
23.80.30.24.11	Mechanical Switchgear	4	
23.80.30.24.14	Electronic Switchgear	4	
23.80.30.24.17	Remote Control Switchgear	4	
23.80.30.24.21	Time Switchgear	4	
23.80.30.27	Variable Power or Resistance Appliances	3	
23.80.30.27.11	Commutators	4	
23.80.30.27.14	Rheostats	4	
23.80.30.27.17	Dimmers	4	
23.80.30.27.21	Speed Controllers	4	
23.80.40.00	Electric Power Protection Devices	2	
23.80.40.11	Earth Connection Electrodes	3	
23.80.40.14	Circuit Breakers	3	
23.80.40.14.11	Automatic Overload Circuit Breakers	4	
23.80.40.14.14	Ground Fault Intercept (GFI) Circuit Breakers	4	
23.80.40.14.17	Earth Leakage Circuit Breakers	4	
23.80.40.21	Lightning Protection	3	
23.80.45.00	Electric Power Treatment Devices	2	
23.80.45.14	Harmonic Control Devices	3	
23.80.45.14.11	Electric Interference Suppressor Filters	4	
23.80.50.00	Terminals for Power Supply	2	
23.80.50.11	Switches and Receptacles	3	
23.80.50.11.11	Receptacle Terminal Units	4	
23.80.50.11.14	Switches	4	
23.80.50.11.17	Ground Fault Receptacles	4	
23.80.50.14	Plug Connectors	3	
23.80.70.00	Lighting	2	
23.80.70.11	Luminaries for Internal Lighting	3	
23.80.70.11.11	General Luminaries, Non Directional	4	
23.80.70.11.14	General Luminaries, Directional	4	
23.80.70.11.14.11	Downlights	5	
23.80.70.11.14.14	Uplights	5	
23.80.70.11.14.17	Direct/Indirect	5	
23.80.70.11.14.21	Spots and Tracklight Specialties	5	
23.80.70.11.17	Specialized Lighting by Location or Use	4	
23.80.70.11.21	Emergency Lighting	4	
23.80.70.11.24	Fiber Optic Lighting	4	
23.80.70.14	Luminaries for External Lighting	3	
23.80.70.14.11	Amenity Lighting	4	
23.80.70.14.11.11	Lighting Bollards	5	
23.80.70.14.11.14	Post-Top Lighting	5	
23.80.70.14.11.17	Wall or Ceiling Mounted External Lighting	5	
23.80.70.14.11.21	Buried Uplights	5	
23.80.70.14.14	Exterior Floodlights	4	
23.80.70.14.17	Exterior Spotlights	4	
23.80.70.14.21	Street and Roadway Lighting	4	
23.80.70.14.24	Aircraft Paving Lighting	4	
23.80.70.14.27	Security Lighting	4	
23.80.70.17	Communication Lighting Specialties	3	
23.80.70.17.11	Emergency Signs	4	
23.80.70.17.14	Illuminated Signs/Boards	4	
23.80.70.17.17	Publicity Lighting	4	
23.80.70.17.21	Lasers	4	
23.85.00.00	Information and Communication	1	
23.85.05.00	Complete Information Systems	2	
23.85.05.14	Complete Visual Information Systems	3	
23.85.05.14.21	Complete Visual Signaling	4	
23.85.05.14.21.11	Mechanical Signals	5	
23.85.05.17	Complete Audio-Visual Systems	3	
23.85.05.17.11	Broadcasting Equipment	4	
23.85.05.17.11.11	Television Broadcasting Equipment	5	
23.85.05.17.11.14	Multimedia Broadcasting Equipment	5	
23.85.05.17.11.17	Broadcasting Light Signals	5	
23.85.10.00	General Information Systems	2	
23.85.10.11	Audio Information, Sound Signals	3	
23.85.10.11.11	Sound and Signal Devices	4	
23.85.10.11.11.11	Bells, Carillons, Single Units	5	
23.85.10.11.11.14	Sirens	5	
23.85.10.11.11.17	Aerials	5	
23.85.10.11.11.21	Speakers	5	
23.85.10.11.14	Audio Equipment	4	
23.85.10.11.14.11	Audio Recorders	5	
23.85.10.11.14.14	Sound Reinforcement	5	
23.85.10.11.14.14.11	Microphones	6	
23.85.10.11.14.14.14	Loudspeakers	6	
23.85.10.11.14.14.17	Sound Amplifiers	6	
23.85.10.11.14.14.21	Audio Equalizers	6	
23.85.10.11.14.17	Headphones	5	
23.85.10.11.14.21	Audio Reproducing Units	5	
23.85.10.11.14.24	Audio Information Accessories	5	
23.85.10.14	Visual Information Systems	3	
23.85.10.14.11	Cameras	4	
23.85.10.14.11.11	Analog Cameras	5	
23.85.10.14.11.14	Digital Cameras	5	
23.85.10.14.14	Slide Projectors	4	
23.85.10.14.17	Overhead Projectors	4	
23.85.10.14.21	Presentation Systems	4	
23.85.10.14.24	Video Monitors	4	
23.85.10.14.24.11	Cathode Ray Tube (CRT) Video Monitors	5	
23.85.10.14.24.14	Liquid Crystal Display (LCD) Video Monitors	5	
23.85.10.14.24.17	Plasma Video Monitors	5	
23.85.10.14.27	Video Walls	4	
23.85.10.14.31	Projection Screens	4	
23.85.10.17	Audio-Visual Systems	3	
23.85.10.17.11	Audio-Visual System Components 	4	
23.85.10.17.11.11	Broadcasting Receiving Equipment	5	
23.85.10.17.11.14	Audio-Visual Recorders (Cam-Corders)	5	
23.85.10.17.11.17	Film Projectors	5	
23.85.10.17.11.21	Data/Multi/Media Projectors	5	
23.85.10.17.11.24	Video Reproduction	5	
23.85.30.00	Safety and Security Information Systems	2	
23.85.30.11	Access Controls	3	
23.85.30.11.11	Access Control and Counting Systems	4	
23.85.30.11.14	Centralized Code Reading Systems	4	
23.85.30.11.17	Electronic Key Systems	4	
23.85.30.11.21	Pressure Mats	4	
23.85.30.11.24	Micro-Switch Contacts for Doors and Windows	4	
23.85.30.11.27	Door Answering	4	
23.85.30.11.31	Security Access	4	
23.85.30.14	Presence Detection/Registration	3	
23.85.30.14.11	Clocking-In and Recording	4	
23.85.30.14.14	Movement/Vibration Detection	4	
23.85.30.14.17	Break-Glass Detection	4	
23.85.30.14.21	Surveillance Mirrors	4	
23.85.30.14.24	Manual Alert Control	4	
23.85.30.14.27	Microwave Detectors	4	
23.85.30.14.31	Infra-Red Radiation Detectors	4	
23.85.30.14.34	Door Bells, Buzzers	4	
23.85.30.17	Closed Circuit Guarding Systems	3	
23.85.30.17.11	Closed Circuit TV Systems	4	
23.85.30.17.14	Video Surveillance	4	
23.85.30.17.17	Closed Circuit Television Recorders	4	
23.85.30.17.17.11	Analog Closed Circuit Television Recorders	5	
23.85.30.17.17.14	Digital Closed Circuit Television Recorders	5	
23.85.30.21	Environmental Detection/Registration	3	
23.85.30.21.11	Fire Detection, Monitoring and Alarm	4	
23.85.30.21.11.11	Fire/Smoke Detectors	5	
23.85.30.21.11.11.11	Smoke Detectors	6	
23.85.30.21.11.11.14	Inonization Detectors	6	
23.85.30.21.11.11.17	Temperature Monitors	6	
23.85.30.21.11.14	Alarm Panels	5	
23.85.30.21.11.17	Other Components	5	
23.85.30.21.14	Concentration Detection Components	4	
23.85.30.21.14.11	Concentration Detection Bells and Sounders	5	
23.85.30.21.14.14	Concentration Detection Alarm Glasses	5	
23.85.30.21.14.99	Other Concentration Detection Components	5	
23.85.30.24	Emergency Call Systems	3	
23.85.30.24.11	Call Systems for the Disabled	4	
23.85.30.24.14	Nurse Call Systems	4	
23.85.30.27	Built-In Failure Detection	3	
23.85.30.27.11	Infiltration Detection	4	
23.85.30.27.14	Service Leak Detection	4	
23.85.30.27.14.11	Gas Leak Detection Agents	5	
23.85.30.27.14.14	Water Leak Detection	5	
23.85.50.00	Communication Systems	2	
23.85.50.11	Communication Circuits	3	
23.85.50.14	Telephone and Intercommunication Equipment	3	
23.85.50.14.11	Single Line Telephone Systems	4	
23.85.50.14.14	Multiple Line Telephone Systems	4	
23.85.50.14.17	Telephone Equipment	4	
23.85.50.14.21	Intercommunication Equipment	4	
23.85.50.17	Communication and Data Processing Equipment	3	
23.85.50.17.11	Computer Network Equipment	4	
23.85.50.17.11.11	Computer Servers	5	
23.85.50.17.11.14	Network Switchers	5	
23.85.50.17.11.17	Network Routers	5	
23.85.50.21	Cable Transmission and Reception Equipment	3	
23.85.50.21.11	Cable Transmission and Reception Amplifiers	4	
23.85.50.21.14	Cable Transmission and Reception Modulators	4	
23.85.50.21.17	Cable Transmission and Reception Control Equipment	4	
23.85.50.24	Broadcast Transmission and Reception Equipment	3	
23.85.50.24.11	Broadcast Transmitters	4	
23.85.50.24.14	Broadcast Antennas	4	
23.85.50.24.17	Broadcast Amplifiers	4	
23.85.50.24.21	Broadcast Control Equipment	4	
23.85.50.27	Microwave Transmission and Reception Equipment	3	
23.85.50.27.11	Microwave Transmitters	4	
23.85.50.27.14	Microwave Antennas	4	
23.85.50.27.17	Satellite Dishes	4	
23.85.50.27.21	Microwave Amplifiers	4	
23.85.50.27.24	Microwave Receivers	4	
23.85.50.31	Intercom Systems	3	
23.85.50.31.11	Door Entry Telephones	4	
23.85.50.99	Other Communications Systems	3	
23.85.50.99.11	Videophone Systems	4	
23.85.50.99.14	Conference Systems	4	
23.85.50.99.17	Breakdown Call Systems	4	
23.85.80.00	Building Automation and Control	2	
23.85.80.11	Building Controls	3	
23.85.80.11.11	Clock Controls	4	
23.85.80.11.14	Door Controls	4	
23.85.80.11.17	Elevator Monitoring and Controls	4	
23.85.80.11.21	Energy Monitoring and Controls	4	
23.85.80.11.24	Environmental Controls	4	
23.85.80.11.27	Lighting Controls	4	
