- Plumbing, heating, air-conditioning (7)
- Painting and paper hanging (1)
- Electrical work (2)
- Masonry and other stonework (1)
- Carpentry work (2)
- Floor laying and floor work, nec (3)
- Roofing, siding, and sheetmetal work (4)
- Concrete work (3)
- Excavation work (5)
- Wrecking and demolition work (1)
- Special trade contractors, nec (2)
