- Plumbing, heating, air-conditioning (7)
- Painting and paper hanging (7)
- Electrical work (8)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (2)
- Carpentry work (1)
- Roofing, siding, and sheetmetal work (3)
- Concrete work (1)
- Structural steel erection (2)
- Excavation work (4)
- Installing building equipment (1)
- Special trade contractors, nec (5)
