| CLASS | TRADE |
|---|---|
| A | GENERAL ENGINEERING CONTRACTOR |
| B | GENERAL BUILDING CONTRACTOR |
| C-5 | FRAMING AND ROUGH CARPENTRY CONTRACTOR |
| C16 | FIRE PROTECTION CONTRACTOR |
| C20 | WARM-AIR HEATING, VENTILATING AND AIR-CONDITIONING CONTRACTOR |
| C36 | PLUMBING CONTRACTOR |
| C42 | SANITATION SYSTEM CONTRACTOR |
| HAZ | HAZARDOUS SUBSTANCE REMOVAL CERTIFICATION |