- Plumbing, heating, air-conditioning (29)
- Painting and paper hanging (18)
- Electrical work (13)
- Masonry and other stonework (7)
- Plastering, drywall, and insulation (9)
- Terrazzo, tile, marble and mosaic work (13)
- Carpentry work (12)
- Floor laying and floor work, nec (5)
- Roofing, siding, and sheetmetal work (9)
- Concrete work (11)
- Structural steel erection (2)
- Glass and glazing work (2)
- Excavation work (2)
- Special trade contractors, nec (30)
