- Plumbing, heating, air-conditioning (10)
- Painting and paper hanging (6)
- Electrical work (7)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (1)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (7)
- Floor laying and floor work, nec (2)
- Roofing, siding, and sheetmetal work (2)
- Concrete work (2)
- Water well drilling (2)
- Structural steel erection (1)
- Excavation work (5)
- Special trade contractors, nec (6)
