| Business | Phone |
| Breshears/Thornton Engineering 14517 Se Rivercrest Dr, Vancouver 98683 | (360) 883-9033 |
| Dls Structural Group Llc 21103 Ne 83rd St, Vancouver 98682 | (360) 883-0547 |
| Kramer-Gehlen & Assoc Inc 400 Columbia St 240, Vancouver 98660 | (360) 693-1621 |
| Structural Concepts 801 Manzanita Way, Vancouver 98661 | (360) 695-8663 |
| Roggenkamperickson & Assoc 10000 Ne 7th Ave 150, Vancouver 98685 | (360) 573-4545 |
| Parkin Engineering Inc 500 Washington St, Vancouver 98660 | (360) 694-8378 |