- Plumbing, heating, air-conditioning (7)
- Painting and paper hanging (4)
- Electrical work (7)
- Plastering, drywall, and insulation (1)
- Carpentry work (6)
- Floor laying and floor work, nec (2)
- Concrete work (2)
- Excavation work (6)
- Special trade contractors, nec (2)
