- Plumbing, heating, air-conditioning (1)
- Painting and paper hanging (1)
- Electrical work (1)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (1)
- Carpentry work (3)
- Structural steel erection (1)
- Excavation work (4)
- Special trade contractors, nec (3)
