- Plumbing, heating, air-conditioning (6)
- Painting and paper hanging (5)
- Electrical work (9)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (5)
- Terrazzo, tile, marble and mosaic work (3)
- Carpentry work (5)
- Roofing, siding, and sheetmetal work (3)
- Concrete work (2)
- Excavation work (5)
- Special trade contractors, nec (9)
