| Organization Name |
Local Number |
| Asbestos & Toxic Abatement Laborers |
300 |
| Asbestos Workers |
5 |
| Boilermakers |
92 |
| Bricklayers & Allied Craftworkers |
4 |
| Cement Masons |
500 |
| Cement Masons |
600 |
| Electrical Workers |
11 |
| Elevator Constructors |
18 |
| Glaziers & Floor Coverers |
11 |
| Gunite Workers |
18 |
| Ironworkers |
416 |
| Ironworkers |
433 |
| Laborers |
300 |
| Laborers |
507 |
| Laborers |
802 |
| Landscape/Irrigation/Underground & Specialty Piping |
345 |
| Millwrights & Machine Erectors |
1607 |
| Operating Engineers |
12 |
| Painters |
95 |
| Painters |
256 |
| Painters |
1595 & 1798 |
| Painters |
36 & 1991 |
| Pile Drivers |
2375 |
| Pipe Trades
United Association |
16 |
| Plasterers |
200 |
| Plumbers |
78 |
| Plumbers & Fitters |
398 |
| Plumbers & Fitters |
761 |
| Roofers & Waterproofers |
36 |
| Sheet Metal Workers |
105 |
| Southwest Regional Council of Carpenters |
709 |
| Sprinkler Fitters |
709 |
| Steamfitters/Air Conditioning/Refrigeration Industrial Pipe Fitters |
250 |
| Tile Layers |
18 |
| Los Angeles/Orange Counties Building & Construction Trades Council AFL-CIO |