- Plumbing, heating, air-conditioning (11)
- Painting and paper hanging (8)
- Electrical work (13)
- Masonry and other stonework (2)
- Carpentry work (2)
- Floor laying and floor work, nec (5)
- Roofing, siding, and sheetmetal work (7)
- Concrete work (6)
- Water well drilling (1)
- Structural steel erection (1)
- Excavation work (1)
- Wrecking and demolition work (1)
- Special trade contractors, nec (8)
