| A Classic Handling Systems Inc | 630-357-7500 | 40 Shuman Blvd | Naperville | IL | 60563 |
| Advance Engineering Corp Steel | 630-628-3445 | 58 W Industrial Rd | Addison | IL | 60101 |
| Amann John Sons Co Inc Wire | 630-972-9473 | 10435 Argonne Woods Dr | Woodridge | IL | 60517 |
| Amer Steel Pipe American Cast Iron Pipe Co | 630-574-7028 | 2625 Butterfield Rd | Oak Brook | IL | 60521 |
| Byus Construction Steel Fabrication Inc | 630-879-2200 | 1750 Hubbard Ave | Batavia | IL | 60510 |
| Carole Industries | 630-543-2325 | 37 W Fulrtn Ave | Addison | IL | 60101 |
| Casey R P Co Inc | 630-264-0600 | 301 W Galena Blvd | Aurora | IL | 60506 |
| Clifton Steel Co Fax | 630-986-0224 | 201 Lake Hinsdale Dr | Clarendon Hills | IL | 60514 |
| Conley Steel Inc | 630-851-0022 | 8820 Ramm Dr | Naperville | IL | 60564 |
| Cozad Herbert W Ofc | 630-416-9801 | 517 Peacock Ct | Naperville | IL | 60565 |
| Custom Weld & Fabricating Ser | 630-355-3696 | 475 N River Rd | Naperville | IL | 60563 |
| Decking & Siding Co Inc | 630-543-0300 | 568 W Winthrop Ave | Addison | IL | 60101 |
| Dick W Co Structural Steel Details | 630-653-7755 | 429 E Saint Charles Rd | Carol Stream | IL | 60188 |
| Drake Engnrng Co | 630-279-7272 | 101 N Addison Ave | Elmhurst | IL | 60126 |
| Edv Corp | 630-377-5449 | 3 N 608 Balkan Dr | Saint Charles | IL | 60174 |
| Gpi Industries Inc | 630-377-1100 | 1840 Production Dr | Saint Charles | IL | 60174 |
| Grove Steel Sales Inc | 630-968-2124 | 4943 Cornell Ave | Downers Grove | IL | 60515 |
| Guardian Construction Products Inc | 630-820-8899 | 10 S 359 Normantwn Rd | Naperville | IL | 60540 |
| H F I | 630-293-9300 | 1100 Carolina Dr | West Chicago | IL | 60185 |
| H L M Construction Corporation | 630-898-6006 | 31 W 335 Schoger Rd | Naperville | IL | 60540 |
| Horn Wm Structural Steel Co | 630-232-0111 | 1101 Commerce Dr | Geneva | IL | 60134 |
| J & D Installers | 630-543-4560 | 415 W Belden Ave | Addison | IL | 60101 |
| Jones Multiservice | 630-543-3222 | 1216 Capitol Dr | Addison | IL | 60101 |
| L D L Manufacturing Inc | 630-543-5052 | 1054 W Republic Dr | Addison | IL | 60101 |
| La Fox Corp | 630-232-0266 | 1 N 298 La Fox Rd | Geneva | IL | 60134 |
| Lewis Engineering Co | 630-510-8200 | 294 Commonwealth Dr | Carol Stream | IL | 60188 |
| Marconi Jos G Ltd | 630-968-2830 | 1212 Barneswood Dr | Downers Grove | IL | 60515 |
| Mcfabrications Industries | 630-268-8777 | 18 W 140 Buttrfld Rd | Oakbrook Terrace | IL | 60181 |
| Metals & Services Inc | 630-627-2900 | 330 W North Ave | Addison | IL | 60101 |
| North America Stainless Inc | 630-665-9050 | 2 S 319 Kiowa Ct | Wheaton | IL | 60189 |
| Odin Industries Inc | 630-365-2475 | 740 Hicks Dr | Elburn | IL | 60119 |
| Oostman Fabricating & Welding Co | 630-241-1315 | 6817 Hobson Valley Dr | Woodridge | IL | 60517 |
| Oswego Industries | 630-554-3088 | E Washington | Oswego | IL | 60543 |
| Ryan John A Associates | 630-789-2466 | 818 S Grant St | Hinsdale | IL | 60521 |
| Steel Detailing Services Inc | 630-552-1080 | 200 S Hale St | Plano | IL | 60545 |
| Sure Fire | 630-213-9300 | 7777 Berkshire Dr | Hanover Park | IL | 60103 |
| T & L Manufacturing Corp | 630-898-7100 | 1665 Dearborn Ave | Aurora | IL | 60505 |
| Tella Tool & Mfg | 630-495-0545 | 1015 N Ridge Ave | Lombard | IL | 60148 |
| Vulcraft Sales Corporation | 630-887-1400 | 201 E Ogden Ave | Hinsdale | IL | 60521 |
| Watson Bowman Acme | 630-691-1010 | 17 W 705-A Buttrfld Rd | Oakbrook Terrace | IL | 60181 |
| Western Fabricating Co | 630-323-7771 | 201 E Ogden Ave | Hinsdale | IL | 60521 |
| Willis John Dvelopment Corp | 630-543-7675 | 150 S Church St | Addison | IL | 60101 |
