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