- Plumbing, heating, air-conditioning (5)
- Painting and paper hanging (3)
- Electrical work (1)
- Masonry and other stonework (1)
- Terrazzo, tile, marble and mosaic work (2)
- Roofing, siding, and sheetmetal work (3)
- Structural steel erection (1)
- Excavation work (1)
- Special trade contractors, nec (2)
