- Plumbing, heating, air-conditioning (8)
- Painting and paper hanging (3)
- Electrical work (3)
- Masonry and other stonework (3)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (6)
- Roofing, siding, and sheetmetal work (5)
- Concrete work (6)
- Water well drilling (1)
- Glass and glazing work (1)
- Excavation work (4)
- Wrecking and demolition work (2)
- Special trade contractors, nec (9)
