| Business | Phone |
| Standard Steel Fabricating Co 8155 1st Ave S, Seattle 98108 | (206) 767-3314 |
| Tower Engineering Corp 1601 5th Ave 1600, Seattle 98101 | (425) 673-4500 |
| Kughler Co 5105 Ballard Ave Nw, Seattle 98107 | (206) 789-0667 |
| Mc Fabco-Blue Chip Steel 635 S Elmgrove St, Seattle 98108 | (206) 621-7487 |
| Northwest Grating Products 9230 4th Ave S, Seattle 98108 | (206) 767-3000 |
| Olympic Steel 5200 Airport Way S, Seattle 98108 | (206) 767-8081 |
| United Iron Works Inc 7421 5th Ave S, Seattle 98108 | (206) 767-3630 |
| Westeel Co 8001 7th Ave S, Seattle 98108 | (206) 767-4224 |
| Vae Nortrak North America 3422 1st Ave S, Seattle 98134 | (206) 622-0125 |
| National Steel Construction Co 3937 Sw 109th St, Seattle 98146 | (206) 242-0310 |
| Steeler Inc 10023 Martin Luther King Jr S, Seattle 98178 | (206) 725-2500 |