| Business | Phone |
| 24 Kt Iron Works 2136 S Ashland Ave, Chicago 60608 | (312) 433-0024 |
| Abbey Metal Corp 820 W 120th St, Chicago 60643 | (773) 568-0330 |
| Abc Steel Fabricator 6344 W Irving Park Rd, Chicago 60634 | (773) 777-5600 |
| Advance Welding & Construction 1500 N Keating Ave, Chicago 60651 | (773) 278-5959 |
| Aetna Engineering Works Inc 12001 S Calumet Ave, Chicago 60628 | (773) 785-0488 |
| Gilly & Son Steel Fabricators 2634 W Barry Ave, Chicago 60618 | (773) 279-8890 |
| Bendco Tubular Product Inc 2880 W 48th Pl, Chicago 60632 | (773) 247-1100 |
| Best Metal Fabricators 429 N Leamington Ave, Chicago 60644 | (773) 921-9100 |
| G E Mathis Co 6100 S Oak Park Ave, Chicago 60638 | (773) 586-3800 |
| Bridgeport Steel Sales 2760 S Hillock Ave, Chicago 60608 | (312) 326-4800 |
| Freedom Steel Inc 5811 N Drake Ave, Chicago 60659 | (708) 283-0718 |
| Butler Street Iron 3422 S Normal Ave, Chicago 60616 | (773) 924-2233 |
| National Steel Bridge Alliance 1 E Wacker Dr, Chicago 60601 | (312) 670-7010 |
| Central Steel Fabricators 3105 W 27th St, Chicago 60623 | (773) 247-2235 |
| Elston Metal Tanks Inc 1623 N Elston Ave, Chicago 60622 | (773) 486-2873 |
| Golden Ironworks Llc 2136 S Ashland Ave, Chicago 60608 | (312) 491-9255 |