- Plumbing, heating, air-conditioning (13)
- Painting and paper hanging (10)
- Electrical work (4)
- Masonry and other stonework (3)
- Plastering, drywall, and insulation (3)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (4)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (5)
- Concrete work (8)
- Glass and glazing work (1)
- Excavation work (14)
- Installing building equipment (1)
- Special trade contractors, nec (10)
