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0000-0999       1000-1999       2000-2999       3000-3999       4000-4999       5000-5999       6000-6999       7000-7999       8000-8999      
1423 - Crushed and Broken Granite
1442 - Construction Sand and Gravel
1521 - General Contractors - Single-Family Houses
1522 - General Contractors - Residential Buildings Other Than Single-Family
1531 - Operative Builders
1541 - General Contractors - Industrial Buildings and Warehouses
1542 - General Contractors - Nonresidential Buildings, Other than Industrial Buildings and Warehouses
1611 - Highway and Street Construction, Except Elevated Highways
1622 - Bridge, Tunnel, and Elevated Highway Construction
1623 - Water, Sewer, Pipeline, and Communications and Power Line Construction
1629 - Heavy Construction, NEC
1711 - Plumbing, Heating, and Air-Conditioning
1721 - Painting and Paper Hanging
1731 - Electrical Work
1741 - Masonry, Stone Setting, and Other Stone Work
1742 - Plastering, Drywall, Acoustical, and Insulation Work
1743 - Terrazzo, Tile, Marble, and Mosaic Work
1751 - Carpentry Work
1752 - Floor Laying and Other Floor Work, NEC
1761 - Roofing, Siding, and Sheet Metal Work
1771 - Concrete Work
1781 - Water Well Drilling
1791 - Structural Steel Erection
1793 - Glass and Glazing Work
1794 - Excavation Work
1795 - Wrecking and Demolition Work
1796 - Installation or Erection of Building Equipment, NEC
1799 - Special Trade Contractors, NEC
0000-0999       1000-1999       2000-2999       3000-3999       4000-4999       5000-5999       6000-6999       7000-7999       8000-8999      
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