About BTi

A General Engineering
B General Building
C-22 Asbestos Abatement
C-4 Boiler, Water Heating and Steam Fitting
C-21 Building Moving/Demolition
C-6 Cabinet, Millwork and Finish Carpentry
C-8 Concrete
C-31 Construction Zone Traffic Control
C-9 Drywall
C-12 Earthwork and Paving
C-10 Electrical
C-45 Electrical Sign
C-11 Elevator
C-13 Fencing
C-16 Fire Protection
C-15 Flooring and Floor Covering
C-5 Framing and Rough Carpentry
C-47 General Manufactured Housing
C-17 Glazing
C-2 Insulation and Acoustical
C-27 Landscaping
C-35 Lathing and Plastering
C-28 Lock and Security Equipment
C-7 Low Voltage Systems
C-29 Masonry
C-23 Ornamental Metal
C-33 Painting and Decorating
C-32 Parking and Highway Improvement
C-34 Pipeline
C-36 Plumbing
C-38 Refrigeration
C-50 Reinforcing Steel
C-39 Roofing
C-42 Sanitation Systems
C-43 Sheet Metal
C-46 Solar
C-51 Structural Steel
C-53 Swimming Pool
C-54 Tile (Ceramic and Mosaic)
C-20 Warm Air Heating, Ventilating and Air Conditioning
C-55 Water Conditioning
C-60 Welding
C-57 Well Drilling (Water)
C-61 Limited Specialty (All trades not covered above)
ASB Asbestos Abatement Certification
HAZ Hazardous Substance Removal Certification
LAW Law and Business