| A & A Steel Fabricating Co | 708-389-4499 | 14100 Harrison Ave | Posen | IL | 60469 |
| Acrofab Manufacturing & Engrg | 708-562-0353 | 134 W Lake St | Northlake | IL | 60164 |
| Advance Ornamental Iron Co | 708-798-3540 | 1325 171st St | Hazel Crest | IL | 60429 |
| All Metal Manufacturing Co | 708-599-7600 | 9925 Industrial Dr | Bridgeview | IL | 60455 |
| Altra Steel | 708-534-2100 | 650 S Egyptian Tr | University Park | IL | 60466 |
| American Classic Rebar Corp | 708-225-1010 | 15810 Suntone Dr | South Holland | IL | 60473 |
| Amero Corporation | 708-385-8483 | 12349 S Lombard Ln | Alsip | IL | 60658 |
| B & F Fabricating Inc | 708-758-7878 | 610 E Sauk Trl | Chicago Heights | IL | 60411 |
| Bok Laddie J | 708-681-1320 | 1320 Main St | Melrose Park | IL | 60160 |
| Brennan Steel Inc | 708-758-2100 | 777 Industrial Dr | University Park | IL | 60466 |
| Chicago Ornamental Iron Co | 708-343-7210 | 3131 W Soffel Ave | Melrose Park | IL | 60160 |
| Clipper Industries Inc | 708-773-1191 | 1520 Norwood Ave | Itasca | IL | 60143 |
| Commercial Fabricator Inc | 708-594-1199 | 7247 S 78th Ave | Bridgeview | IL | 60455 |
| Composite Products Inc | 708-344-9010 | 1310 Main St | Melrose Park | IL | 60160 |
| Compu-Detail Inc | 708-766-7545 | 700 Industrial Dr | Bensenville | IL | 60106 |
| Cuasay & Associates Inc | 708-595-1195 | 720 Industrial Dr | Bensenville | IL | 60106 |
| D O E Components | 708-532-0400 | 184th & 80th Ave | Tinley Park | IL | 60477 |
| Dimensional Drafting Design | 708-388-5290 | 4349 136th Ct | Crestwood | IL | 60445 |
| Domes America | 708-579-9400 | 6345 Joliet Rd | La Grange | IL | 60525 |
| Galassi Cut Stone & Marble Co | 708-349-1870 | 11616 179th St | Mokena | IL | 60448 |
| Genesis Inc | 708-894-6634 | 301 Central Ave | Roselle | IL | 60172 |
| Global Engineering | 708-596-0900 | 1466 E 168th St | South Holland | IL | 60473 |
| Gooder Henrichsen Co Inc | 708-757-5030 | 2900 State St | Chicago Heights | IL | 60411 |
| Gremp E W Enterprises | 708-757-7808 | Glenwd Dyer Rd | Chicago Heights | IL | 60411 |
| Gremp Steel Co | 708-489-1000 | 14100 Western Ave | Posen | IL | 60469 |
| Industrial Fiberglass Inc | 708-681-2707 | 1100 Main St | Melrose Park | IL | 60160 |
| Industrial Steel & Supply | 708-333-8663 | 16905 Van Dam Rd | South Holland | IL | 60473 |
| Inter Mid America Steel Inc | 708-595-3000 | 600 E Irving Park Rd | Bensenville | IL | 60106 |
| King Metal Company | 708-388-3845 | 4200 W 122nd St | Alsip | IL | 60658 |
| Kingery Steel Fabricators Inc | 708-474-6665 | 16895 Chicago Ave | Lansing | IL | 60438 |
| Knippel Ornamental Iron Inc | 708-474-2100 | 17542 Chicago Ave | Lansing | IL | 60438 |
| Kofab Inc | 708-418-7805 | 17035 Burnham Ave | Lansing | IL | 60438 |
| Loeffel Steel Products | 708-849-8001 | 14100 S Halsted St | Riverdale | IL | 60627 |
| M T M Metal Fabrication | 708-924-4957 | 701 E Irving Park Rd | Roselle | IL | 60172 |
| Mason Welding Inc | 708-755-0621 | 3321 Holeman Ave | Chicago Heights | IL | 60411 |
| Metaltek Fabricating Inc | 708-534-9102 | 2595 Bond St | University Park | IL | 60466 |
| Midwest Fabricators Inc | 708-841-0727 | W 140th & Stewrt Ave | Riverdale | IL | 60627 |
| Midwestern Steel Sales Inc | 708-766-0677 | 449 Evergreen Ave | Bensenville | IL | 60106 |
| Nicks Metal Fabricating & Son | 708-485-1170 | 9132 47th St | Brookfield | IL | 60513 |
| Oakley Steel Products Co | 708-544-7970 | 650 28th Ave | Bellwood | IL | 60104 |
| Pacific Structural | 708-597-9497 | 5131 W 115th St | Worth | IL | 60482 |
| Par Fabricating Co | 708-385-9147 | 12653 Irving Ave | Blue Island | IL | 60406 |
| Phoenix Fabrication | 708-339-1755 | 15100 4th Ave | Phoenix | IL | 60426 |
| Phoenix Iron Works Inc | 708-863-0300 | 4711 W 16th St | Cicero | IL | 60650 |
| Precision Metal Products Inc | 708-860-0123 | 841 Fairway Dr | Bensenville | IL | 60106 |
| Rockford Fabricators Inc | 708-403-4242 | 64 Orland Square Dr | Orland Park | IL | 60462 |
| Rockwell Engnrng Co | 708-385-4600 | 135th & Ann | Blue Island | IL | 60406 |
| Romero Steel Co Inc | 708-216-0001 | 1300 Main St | Melrose Park | IL | 60160 |
| Roth Metal Fabrications | 708-371-8300 | 3735 W 128th Pl | Alsip | IL | 60658 |
| S & S Intl Inc | 708-238-2000 | 945 Sivert Dr | Wood Dale | IL | 60191 |
| S G Krauss Co | 708-893-5577 | 528 Morse Ave | Schaumburg | IL | 60193 |
| Shamrock Manufacturing | 708-331-7776 | 15920 Suntone Dr | South Holland | IL | 60473 |
| Shelco Specialities Steel Fabricators | 708-841-0798 | 346 E Sibley Bl | Dolton | IL | 60419 |
| Shelco Steel Works Inc | 708-333-5380 | 158th & Van Drunen Rd | South Holland | IL | 60473 |
| South Suburban Welding | 708-385-7160 | 14022 Western Ave | Posen | IL | 60469 |
| Springrove Metal Fabricating Inc | 708-485-4710 | 9436 47th St | Brookfield | IL | 60513 |
| Springrove Metal Fabricating Inc | 708-246-6557 | 3901 Grove Ave | Western Springs | IL | 60558 |
| Star Manufacturing Co | 708-757-7120 | Cottage Grv Av & Joe Orr Rd | Chicago Heights | IL | 60411 |
| Steel Forms Inc | 708-799-6701 | 1953 183rd St | Homewood | IL | 60430 |
| Strahs Boitz & Assoc | 708-529-1010 | 675 E Irving Park Rd | Roselle | IL | 60172 |
| Structural Metals Inc | 708-582-9800 | 701 E Irving Park Rd | Roselle | IL | 60172 |
| Techno-Mex Enterprises Inc | 708-766-2414 | 960 Sivert Dr | Wood Dale | IL | 60191 |
| Techway Industrial Fabrication | 708-258-9066 | 31831 S Rathje Rd | Peotone | IL | 60468 |
| Titan Manufacturing Co | 708-756-2720 | 3327 Butler St | Chicago Heights | IL | 60411 |
| Torres Fabrication & Supply Co | 708-339-1714 | 15100 S Wallace Phenix | Harvey | IL | 60426 |
| United Conveyor Corporation | 708-344-8050 | 2025 N 15th Ave | Melrose Park | IL | 60160 |
| Western Fabricating Company Inc | 708-766-5342 | 3740 Podlin Dr | Bensenville | IL | 60105 |
| Weston Steel Fabricating Co | 708-345-6440 | 61 E Lake St | Northlake | IL | 60164 |
| Wold Industries Inc | 708-596-3880 | 16816 Lathrop Ave | Harvey | IL | 60426 |
