- Plumbing, heating, air-conditioning (11)
- Painting and paper hanging (5)
- Electrical work (2)
- Masonry and other stonework (1)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (3)
- Floor laying and floor work, nec (2)
- Roofing, siding, and sheetmetal work (9)
- Concrete work (3)
- Structural steel erection (2)
- Excavation work (1)
- Wrecking and demolition work (1)
- Installing building equipment (1)
- Special trade contractors, nec (3)
