- Plumbing, heating, air-conditioning (19)
- Painting and paper hanging (8)
- Electrical work (9)
- Masonry and other stonework (7)
- Plastering, drywall, and insulation (1)
- Terrazzo, tile, marble and mosaic work (3)
- Carpentry work (3)
- Floor laying and floor work, nec (2)
- Roofing, siding, and sheetmetal work (6)
- Concrete work (7)
- Water well drilling (3)
- Structural steel erection (1)
- Excavation work (2)
- Special trade contractors, nec (9)
