- Plumbing, heating, air-conditioning (26)
- Painting and paper hanging (21)
- Electrical work (14)
- Masonry and other stonework (7)
- Plastering, drywall, and insulation (7)
- Terrazzo, tile, marble and mosaic work (8)
- Carpentry work (6)
- Floor laying and floor work, nec (7)
- Roofing, siding, and sheetmetal work (10)
- Concrete work (17)
- Water well drilling (2)
- Structural steel erection (1)
- Glass and glazing work (1)
- Excavation work (8)
- Wrecking and demolition work (1)
- Special trade contractors, nec (23)
