[15] Terrazzo, tile, marble, and mosaic work, special trade contractors, industry 1743
[16] Carpentry work special trade contractors, industry 1751
[17] Floor laying and other floor work special trade contractors, not elsewhere classified, industry 1752
[18] Roofing, siding, and sheet metal work special trade contractors, industry 1761
[19] Concrete work special trade contractors, industry 1771
[20] Water well drilling special trade contractors, industry 1781
[21] Structural steel erection special trade contractors, industry 1791
[22] Glass and glazing work special trade contractors, industry 1793
[23] Excavation work special trade contractors, industry 1794
[24] Wrecking and demolition work special trade contractors, industry 1795
[25] Installation or erection of building equipment special trade contractors, not elsewhere classified, industry 1796
[26] special trade contractors, not elsewhere classified, industry 1799
[27] United States summary
establishments with and without payroll.