- Plumbing, heating, air-conditioning (10)
- Painting and paper hanging (3)
- Electrical work (6)
- Masonry and other stonework (3)
- Plastering, drywall, and insulation (5)
- Terrazzo, tile, marble and mosaic work (3)
- Carpentry work (4)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (3)
- Concrete work (6)
- Water well drilling (2)
- Structural steel erection (1)
- Excavation work (9)
- Special trade contractors, nec (9)
