| 1500 |
General Building Contractors |
| 1520 |
Residential Building Construction |
| 1521 |
Single-Family Housing Construction |
| 1522 |
Residential Construction, NEC |
| 1530 |
Operative Builders |
| 1531 |
Operative Builders |
| 1540 |
Nonresidential Building Construction |
| 1541 |
Industrial Buildings and Warehouses |
| 1542 |
Nonresidential Construction, NEC |
| 1600 |
Heavy Construction, Ex. Building |
| 1610 |
Highway and Street Construction |
| 1611 |
Highway and Street Construction |
| 1620 |
Heavy Construction, Except Highway |
| 1622 |
Bridge, Tunnel, and Elevated Highway |
| 1623 |
Water, Sewer, and Utility Lines |
| 1629 |
Heavy Construction, NEC |
| 1700 |
Special Trade Contractors |
| 1710 |
Plumbing, Heating, Air-Conditioning |
| 1711 |
Plumbing, Heating, Air-Conditioning |
| 1720 |
Painting and Paper Hanging |
| 1721 |
Painting and Paper Hanging |
| 1730 |
Electrical Work |
| 1731 |
Electrical Work |
| 1740 |
Masonry, Stonework, and Plastering |
| 1741 |
Masonry and Other Stone Work |
| 1742 |
Plastering, Drywall, and Insulation |
| 1743 |
Terrazzo, Tile, Marble, Mosaic Work |
| 1750 |
Carpentry and Floor Work |
| 1751 |
Carpentry Work |
| 1752 |
Floor Laying and Floor Work, NEC |
| 1760 |
Roofing, Siding, and Sheet Metal Work |
| 1761 |
Roofing, Siding, and Sheet Metal Work |
| 1770 |
Concrete Work |
| 1771 |
Concrete Work |
| 1780 |
Water Well Drilling |
| 1781 |
Water Well Drilling |
| 1790 |
Misc. Special Trade Contractors |
| 1791 |
Structural Steel Erection |
| 1793 |
Glass and Glazing Work |
| 1794 |
Excavation Work |
| 1795 |
Wrecking and Demolition Work |
| 1796 |
Installing Building Equipment, NEC |
| 1799 |
Special Trade Contractors, NEC |
