23 Construction
236 Construction of Buildings
2362 Nonresidential Building Construction
23621 Industrial Building Construction
236210 Industrial Building Construction
23622 Commercial and Institutional Building Construction
236220 Commercial and Institutional Building Construction
237 Heavy and Civil Engineering Construction
2371 Utility System Construction
23711 Water and Sewer Line and Related Structures Construction
237110 Water and Sewer Line and Related Structures Construction
23713 Power and Communication Line and Related Structures Construction
237130 Power and Communication Line and Related Structures Construction
2373 Highway, Street, and Bridge Construction
23731 Highway, Street, and Bridge Construction
237310 Highway, Street, and Bridge Construction
2379 Other Heavy and Civil Engineering Construction
23799 Other Heavy and Civil Engineering Construction
237990 Other Heavy and Civil Engineering Construction
238 Specialty Trade Contractors
2381 Foundation, Structure, and Building Exterior Contractors
23811 Poured Concrete Foundation and Structure Contractors
238110 Poured Concrete Foundation and Structure Contractors
23812 Structural Steel and Precast Concrete Contractors
238120 Structural Steel and Precast Concrete Contractors
23813 Framing Contractors
238130 Framing Contractors
23814 Masonry Contractors
238140 Masonry Contractors
23815 Glass and Glazing Contractors
238150 Glass and Glazing Contractors
23816 Roofing Contractors
238160 Roofing Contractors
23817 Siding Contractors
238170 Siding Contractors
23819 Other Foundation, Structure, and Building Exterior Contractors
238190 Other Foundation, Structure, and Building Exterior Contractors
2382 Building Equipment Contractors
23821 Electrical Contractors and Other Wiring Installation Contractors
238210 Electrical Contractors and Other Wiring Installation Contractors
23822 Plumbing, Heating, and Air-Conditioning Contractors
238220 Plumbing, Heating, and Air-Conditioning Contractors
23829 Other Building Equipment Contractors
238290 Other Building Equipment Contractors
2383 Building Finishing Contractors
23831 Drywall and Insulation Contractors
238310 Drywall and Insulation Contractors
23832 Painting and Wall Covering Contractors
238320 Painting and Wall Covering Contractors
23833 Flooring Contractors
238330 Flooring Contractors
23834 Tile and Terrazzo Contractors
238340 Tile and Terrazzo Contractors
23835 Finish Carpentry Contractors
238350 Finish Carpentry Contractors
23839 Other Building Finishing Contractors
238390 Other Building Finishing Contractors
2389 Other Specialty Trade Contractors
23891 Site Preparation Contractors
238910 Site Preparation Contractors
23899 All Other Specialty Trade Contractors
238990 All Other Specialty Trade Contractors
4233 Lumber and Other Construction Materials Merchant Wholesalers
42331 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
42332 Brick, Stone, and Related Construction Material Merchant Wholesalers
423320 Brick, Stone, and Related Construction Material Merchant Wholesalers
42333 Roofing, Siding, and Insulation Material Merchant Wholesalers
423330 Roofing, Siding, and Insulation Material Merchant Wholesalers
42339 Other Construction Material Merchant Wholesalers
423390 Other Construction Material Merchant Wholesalers
4237 Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers
42371 Hardware Merchant Wholesalers
423710 Hardware Merchant Wholesalers
42372 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
423720 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
4238 Machinery, Equipment, and Supplies Merchant Wholesalers
42381 Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
423810 Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
42382 Farm and Garden Machinery and Equipment Merchant Wholesalers
423820 Farm and Garden Machinery and Equipment Merchant Wholesalers
42383 Industrial Machinery and Equipment Merchant Wholesalers
423830 Industrial Machinery and Equipment Merchant Wholesalers
42384 Industrial Supplies Merchant Wholesalers
423840 Industrial Supplies Merchant Wholesalers
42385 Service Establishment Equipment and Supplies Merchant Wholesalers
423850 Service Establishment Equipment and Supplies Merchant Wholesalers
42386 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
423860 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
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