| *General Contractors | ||
| Full-service contractors specializing in commercial, industrial and institutional projects | ||
| Boilermaker Employing Contractors | ||
| Boiler contractors for schools, hospitals and power plants; and blast furnaces for heavy industry | ||
| Bricklaying Contractors | ||
| Brick, tile, terrazzo, marble, concrete and cement as well as cleaning, pointing, refractory and restoration contractors | ||
| Carpentry Contractors | ||
| General trade, acoustical and floor covering as well as a variety of specialty trade contractors | ||
| Cement Mason and Plastering Contractors | ||
| Contractors who employ finish concrete cement masons and plasterers | ||
| Construction Equipment Contractors (Operating Engineers) | ||
| Heavy equipment contractors for cranes, dozers, scrapers, loaders, graders, backhoes and pavers | ||
| Construction Labor Contractors (Laborers) | ||
| Contractors who prepare/clean sites for buildings, highways, demolition & hazardous waste removal | ||
| Electrical Contractors | ||
| Residential, commercial and industrial electrical and communication contractors | ||
| Elevator Constructor Contractors | ||
| Elevator contractors who install, repair, and maintain elevators, escalators, and handicap lifts | ||
| Fire Protection Contractors | ||
| Contractors who employ sprinklerfitters, who install fire protection systems of all kinds | ||
| Glass and Glazier Contractors | ||
| Contractors who work mainly with glass | ||
| Industrial Mechanic Contractors (Millwrights) | ||
| Industrial mechanic contractors who install, test, remove, repair and service a wide variety of industrial machinery and equipment | ||
| Insulation and Asbestos Contractors | ||
| Thermal insulation, prefabrication, energy conservation and thermal efficiency contractors | ||
| Mechanical Contractors | ||
| Plumbing, pipefitting, steamfitting and mechanical service trade contractors | ||
| Painting Contractors | ||
| Contractors who employ painters, paperhangers and drywall finishers | ||
| Roofing Contractors | ||
| Roofing/waterproofing contractors for hot built-up or single-ply roofs; also shingle, tile, & slate | ||
| Sheet Metal Contractors | ||
| Contractors for the heating, ventilating, air-conditioning and refrigeration industry | ||
| Structural Steel & Reinforcing Contractors (Ironworkers) | ||
| Erection of structural steel, reinforcing rod in concrete and welding fabrication contractors | ||
