- Plumbing, heating, air-conditioning (7)
- Electrical work (3)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (1)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (1)
- Floor laying and floor work, nec (5)
- Roofing, siding, and sheetmetal work (1)
- Concrete work (1)
- Glass and glazing work (1)
- Excavation work (1)
- Special trade contractors, nec (3)
