- Plumbing, heating, air-conditioning (2)
- Electrical work (3)
- Masonry and other stonework (2)
- Terrazzo, tile, marble and mosaic work (1)
- Roofing, siding, and sheetmetal work (1)
- Concrete work (1)
- Water well drilling (2)
- Excavation work (2)
- Special trade contractors, nec (5)
