- Plumbing, heating, air-conditioning (17)
- Painting and paper hanging (9)
- Electrical work (15)
- Masonry and other stonework (4)
- Plastering, drywall, and insulation (1)
- Carpentry work (4)
- Floor laying and floor work, nec (2)
- Roofing, siding, and sheetmetal work (9)
- Concrete work (12)
- Structural steel erection (2)
- Glass and glazing work (1)
- Excavation work (10)
- Wrecking and demolition work (2)
- Special trade contractors, nec (23)
