- A: General Engineering
- B: General Building
- C-2: Insulation & Acoustical
- C-4: Boiler, Hot-Water Heating & Steam Fitting
- C-5: Framing & Rough Carpentry
- C-6: Cabinet, Millwork, and Finish Carpentry
- C-7: Low-Voltage Systems
- C-8: Concrete
- C-9: Drywall
- C-10: Electrical
- C-11: Elevator
- C-12: Earthwork & Paving
- C-13: Fencing
- C-15: Flooring & Floor Covering
- C-16: Fire Protection
- C-17: Glazing
- C-20: HVAC
- C-21: Building Moving/Demolition
- C-23: Ornamental Metal
- C-27: Landscaping
- C-28: Lock & Security Equipment
- C-29: Masonry
- C-32: Parking & Highway Improvement
- C-33: Painting & Decorating
- C-34: Pipeline
- C-35: Plastering
- C-36: Plumbing
- C-38: Refrigeration
- C-39: Roofing
- C-42: Sanitation
- C-43: Sheet Metal
- C-45: Electrical Signs
- C-46: Solar
- C-47: General Manufactured Housing
- C-50: Reinforcing Steel
- C-51: Structural Steel
- C-53: Swimming Pool
- C-54: Tile
- C-55: Water Conditioning
- C-57: Well Drilling
- C-60: Welding
- Asbestos Abatement
- HAZ Hazardous Substances Removal Certification
- Law and Business





