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