- Plumbing, heating, air-conditioning (5)
- Painting and paper hanging (2)
- Electrical work (3)
- Masonry and other stonework (1)
- Carpentry work (3)
- Floor laying and floor work, nec (3)
- Roofing, siding, and sheetmetal work (4)
- Concrete work (2)
- Water well drilling (1)
- Structural steel erection (1)
- Excavation work (5)
- Special trade contractors, nec (3)
