- Plumbing, heating, air-conditioning (32)
- Painting and paper hanging (22)
- Electrical work (20)
- Masonry and other stonework (5)
- Plastering, drywall, and insulation (12)
- Terrazzo, tile, marble and mosaic work (3)
- Carpentry work (9)
- Floor laying and floor work, nec (3)
- Roofing, siding, and sheetmetal work (15)
- Concrete work (11)
- Structural steel erection (2)
- Glass and glazing work (1)
- Excavation work (5)
- Installing building equipment (2)
- Special trade contractors, nec (22)
