A - General Engineering Contractor
B - General Building Contractor
C-2 - Insulation and Acoustical Contractor
C-4 - Boiler, Hot Water Heating and Steam Fitting Contractor
C-5 - Framing and Rough Carpentry Contractor
C-6 - Cabinet, Millwork and Finish Carpentry Contractor
C-7 - Low Voltage Systems Contractor
C-8 - Concrete Contractor
C-10 - Electrical Contractor
C-11 - Elevator Contractor
C-12 - Earthwork and Paving Contractors
C-13 - Fencing Contractor
C-15 - Flooring and Floor Covering Contractors
C-16 - Fire Protection Contractor
C-17 - Glazing Contractor
C-20 - Warm-Air Heating, Ventilating and Air-Conditioning Contractor
C-21 - Building Moving/Demolition Contractor
C-22 - Asbestos Abatement Contractor
C-23 - Ornamental Metal Contractor
C-27 - Landscaping Contractor
C-28 - Lock and Security Equipment Contractor
C-29 - Masonry Contractor
C-31 - Construction Zone Traffic Control Contractor
C-32 - Parking and Highway Improvement Contractor
C-33 - Painting and Decorating Contractor
C-34 - Pipeline Contractor
C-35 - Lathing and Plastering Contractor
C-36 - Plumbing Contractor
C-38 - Refrigeration Contractor
C-39 - Roofing Contractor
C-42 - Sanitation System Contractor
C-43 - Sheet Metal Contractor
C-47 - General Manufactured Housing Contractor
C-50 - Reinforcing Steel Contractor
C-51 - Structural Steel Contractor
C-53 - Swimming Pool Contractor
C-54 - Ceramic and Mosaic Tile Contractor
C-55 - Water Conditioning Contractor
C-57 - Well Drilling Contractor
C-60 - Welding Contractor
ASB - Asbestos Certification
HAZ - Hazardous Substance Removal Certification
