B & L Mechanical Inc

B: General Building Contractor

Authorizes construction of structures including residential, commercial, and industrial buildings requiring at least two unrelated building trades or crafts. May take prime contracts or subcontracts for framing or carpentry. May subcontract all specialty work but must hold the appropriate C license to self-perform specialty trade work.

Not authorized: Cannot self-perform specialty trade work (electrical, plumbing, HVAC, etc.) without holding the corresponding C license. Cannot contract for C-16 Fire Protection or C-57 Well Drilling without the appropriate license or subcontractor.

C-2: Insulation and Acoustical Contractor

Installs insulating media and preformed architectural acoustical materials for temperature and sound control, including batt, blown, rigid board, spray-applied, and acoustical tile or panel systems.

Not authorized: Does not authorize removal of asbestos-containing materials.

C-4: Boiler, Hot-Water Heating and Steam Fitting Contractor

Installs, services, and repairs power boiler installations, hot-water heating systems and steam fitting, including fire-tube and water-tube boilers, piping, fittings, valves, gauges, pumps, radiators, fuel oil tanks, chimneys, flues, and associated solar heating equipment.

Not authorized: Does not include warm-air heating or air conditioning systems (see C-20).

C-16: Fire Protection Contractor

Lays out, fabricates, and installs all types of fire protection systems including all associated equipment.

Not authorized: Does not include electrical alarm systems.

C-20: Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor

Fabricates, installs, maintains, services, and repairs warm-air heating systems and water heating heat pumps, ventilating systems, air-conditioning systems, and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with these systems. Includes solar-powered HVAC systems.

Not authorized: Does not include boiler or steam heating (see C-4) or refrigeration below 50F (see C-38).

C-36: Plumbing Contractor

Provides means for a supply of safe water and proper disposal of fluid waste, including piping, storage tanks, venting, gas appliances and connections, water and gas piping, water heating equipment including solar, and health and safety devices such as backflow preventers and gas earthquake valves.

Not authorized: Does not include forced warm-air units (see C-20).

C-38: Refrigeration Contractor

Constructs, fabricates, erects, installs, maintains, services, and repairs refrigerators, refrigerated rooms, insulated spaces, temperature insulation, air-conditioning units, ducts, blowers, and thermostatic controls for temperatures below 50 degrees Fahrenheit (10 degrees Celsius).

Not authorized: Temperatures above 50F fall under C-20 HVAC.

C-42: Sanitation System Contractor

Fabricates and installs cesspools, septic tanks, storm drains, and other sewage disposal and drain structures, including cast iron, steel, concrete, and vitreous pipe.

C-43: Sheet Metal Contractor

Selects, cuts, shapes, fabricates, and installs sheet metal including cornices, flashings, gutters, leaders, pans, kitchen equipment, duct work with insulation, patented chimneys, metal flues, and metal roofing systems.