- Plumbing, heating, air-conditioning (7)
- Painting and paper hanging (6)
- Electrical work (17)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (3)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (4)
- Roofing, siding, and sheetmetal work (11)
- Concrete work (2)
- Glass and glazing work (1)
- Excavation work (3)
- Installing building equipment (2)
- Special trade contractors, nec (9)
