| Aaa Galvanizing Inc | 815-723-5000 | 625 Mills Rd | Joliet | IL | 60433 |
| Aerotech Precision Welding & Gabricating | 815-397-8001 | 2323 20th Ave | Rockford | IL | 61104 |
| American Misc Steel Inc | 815-838-4335 | 411 Madison St | Lockport | IL | 60441 |
| Anchor Welding & Fabricating | 815-937-1640 | 2950 Lowe Rd | Kankakee | IL | 60901 |
| Anzelc Welding | 815-725-5668 | 322 Moen Ave | Rockdale | IL | 60436 |
| Architectural Metals Inc | 815-654-2300 | 6200 Forest Hils Rd | Rockford | IL | 61114 |
| B & B Properties | 815-748-0420 | 2239 Gateway Dr | Sycamore | IL | 60178 |
| Beesing Welding & Equ | 815-732-7552 | 2056 S State Route 2 | Oregon | IL | 61061 |
| Bjs Portable Weld | 815-857-3117 | 1716 Lee Center Rd | Amboy | IL | 61310 |
| Bogott A E & Sons Incorporated | 815-625-1037 | 112 3rd Ave | Sterling | IL | 61081 |
| Carter Industries Inc | 815-356-8340 | 7505 Eastgate Rd | Crystal Lake | IL | 60014 |
| Cbi Services Inc | 815-933-2200 | 1137 E 5000n Rd | Bourbonnais | IL | 60914 |
| Chenoa Welding & Fabrication Inc | 815-945-7831 | 322 Morehead | Chenoa | IL | 61726 |
| Co-Lin Metals | 815-399-5311 | 5075 26th Ave | Rockford | IL | 61109 |
| Cullen J T Co | 815-589-2412 | Hwy 84 | Fulton | IL | 61252 |
| Custom Red Iron & Services | 815-397-8985 | 6933 Canter Ct | Rockford | IL | 61108 |
| Custom Welding Services | 815-232-6992 | 100 S Hancock Ave | Freeport | IL | 61032 |
| Designer Metal Products Inc | 815-672-1777 | 904 E Kent St | Streator | IL | 61364 |
| Ekstrom-Carlson Fabricating Co | 815-226-1511 | 1204 Milford Ave | Rockford | IL | 61109 |
| Enterprise Industries Inc | 815-469-6611 | 275 Industry Ave | Frankfort | IL | 60423 |
| Erect-A-Tube Incorporated | 815-943-4091 | 701 W Park St | Harvard | IL | 60033 |
| Fasteel Industries | 815-462-3278 | 213 Otto Rd | New Lenox | IL | 60451 |
| Garretson Streel Fabrication | 815-438-7631 | Rt 3 | Prophetstown | IL | 61277 |
| Gemini Steel Erectors Fabricators & Machine Re | 815-472-6817 | 123 N Dixie Hwy | Momence | IL | 60954 |
| Giovanini Welding | 815-842-1161 | 1320 N Main St | Pontiac | IL | 61764 |
| Hendrickson Stamping | 815-727-4031 | Caton Farm Rd | Crest Hill | IL | 60435 |
| Henning Welding Service Inc | 815-389-1149 | 135 Town Line Ave | South Beloit | IL | 61080 |
| Ill Fabricators Incorporated | 815-939-3551 | 265 S Kinzie Ave | Bradley | IL | 60915 |
| J & D Rentals & Sales | 815-538-6649 | 111 S 13th Ave | Mendota | IL | 61342 |
| J & M Fab Metals Inc | 815-758-0354 | 1720 State St | De Kalb | IL | 60115 |
| Johnstons Master Service Inc | 815-436-5696 | 610 W Lockport Rd | Plainfield | IL | 60544 |
| Kapala Fred J Ofc | 815-633-1162 | 7410 Forest Hills Rd | Rockford | IL | 61100 |
| Kelair Products Inc | 815-675-2728 | 2222 Pierce Dr | Spring Grove | IL | 60081 |
| Klitzing Welding & Machine | 815-692-2432 | 508 W Oak St | Fairbury | IL | 61739 |
| Knoll Steel Inc | 815-675-9400 | 2851 Rte 12 | Spring Grove | IL | 60081 |
| Krakar Manufacturing Co | 815-725-7286 | 500 Joyce Rd | Joliet | IL | 60436 |
| Luke's Homes Sales | 815-877-2010 | 7927 Forest Hills Rd | Loves Park | IL | 61111 |
| Magoo Ind | 815-772-7585 | 609 E Lincolnway | Morrison | IL | 61270 |
| Mannor J S Machine Corp | 815-338-8700 | 427 E Judd St | Woodstock | IL | 60098 |
| Maple Machine Service Inc | 815-937-5757 | 1820 E Maple St | Kankakee | IL | 60901 |
| Marquette Steel Supply & Fabrication Inc | 815-433-0178 | 800 W Marquette St | Ottawa | IL | 61350 |
| Mc Henry Welding Service | 815-385-4929 | 2912 W Rt 120 | Mc Henry | IL | 60050 |
| Mendota Welding & Mfg | 815-539-6944 | 1605-1/2-13th Ave | Mendota | IL | 61342 |
| Metal Fabricators Incorporated | 815-399-4352 | 2806 22nd St | Rockford | IL | 61109 |
| Metalline Inc | 815-725-5757 | 251 Republic Ave | Joliet | IL | 60435 |
| Midamerica Communications Specialists Co | 815-485-7363 | 1101 Bjork Dr | New Lenox | IL | 60451 |
| Midwest Antenna Systems | 815-683-2537 | Rt 49 S | Crescent City | IL | 60928 |
| Miller Formless Company Incorporated | 815-385-7700 | 1805 Dot St | Mc Henry | IL | 60050 |
| Mitchell Industrial Contractors Inc | 815-939-3306 | 242 W Jeffery St | Kankakee | IL | 60901 |
| Mitchell Steel Fabricators Incorporated | 815-426-2144 | 290 W Kankakee Ave | Herscher | IL | 60941 |
| Mod-Tek Inc Bldgs | 815-625-5954 | 1109 Emmons Av | Rock Falls | IL | 61081 |
| Nelson Manufacturing | 815-229-0161 | 2516 20th St | Rockford | IL | 61104 |
| Northern Industrial Steel Corporation | 815-469-2708 | Center Rd | Frankfort | IL | 60423 |
| O T G Inc | 815-961-8800 | 516 16th Ave | Rockford | IL | 61104 |
| Olympic Welding & Mfg Inc | 815-872-9931 | Railroad Av East | Princeton | IL | 61356 |
| Peterson Manufacturing Company Engnrs | 815-436-9201 | 700 W 143rd St | Plainfield | IL | 60544 |
| Precision Fabricators | 815-389-3067 | 200 Oak Grove Ave | South Beloit | IL | 61080 |
| Princeton Welding Shop | 815-875-1704 | 1503 W Peru St | Princeton | IL | 61356 |
| R & B Metal Prdts | 815-338-1890 | 801 Mchenry Ave | Woodstock | IL | 60098 |
| R B & Sons | 815-727-9330 | 916 Collins St | Joliet | IL | 60432 |
| Rochelle Farbricating | 815-562-7805 | 2823 S Center Rd | Rochelle | IL | 61068 |
| Rock River Farbrications Inc | 815-778-3355 | 900 E Commercial | Lyndon | IL | 61261 |
| Rockford Fabricators Inc | 815-398-9990 | 4963 27th Ave | Rockford | IL | 61109 |
| Rockford Ornamental Iron-Structural Steel Div | 815-968-5357 | 1817 Mich Av | Rockford | IL | 61100 |
| Rolyn Homes | 815-941-2940 | 1020 Gore Rd | Morris | IL | 60450 |
| Rubin J & Co Steel | 815-964-9471 | 305 Peoples Ave | Rockford | IL | 61104 |
| Ryan Manufacturing | 815-695-5310 | 11610 N La Salle Rd | Newark | IL | 60541 |
| S & F Machine Co Steel Fabrcatr | 815-672-2563 | 1301 E Livingstn Rd | Streator | IL | 61364 |
| Sheffield Steel Corp-Joliet To Report Late Or | 815-723-5963 | Industry Ave | Joliet | IL | 60435 |
| Silver Louis Scrap Iron & Metal Co | 815-544-3119 | 813 E Pleasant St | Belvidere | IL | 61008 |
| Sycamore Welding & Fabricatin | 815-784-2557 | Hwy 72 W | Genoa | IL | 60135 |
| Tnt Steel Industries | 815-233-0022 | 1560 State Route 75 E | Freeport | IL | 61032 |
| Traco Industries Inc Steel | 815-675-6603 | 7451 Spring Grove Rd | Spring Grove | IL | 60081 |
| Triangle Metals Incorporated | 815-398-0280 | 2500 Harrison Ave | Rockford | IL | 61108 |
| Tr-Star Manufacturing Co | 815-338-5760 | 1200 Cobblestone Way | Woodstock | IL | 60098 |
| Universal Lockport Co | 815-727-9201 | 1102 Collins St | Joliet | IL | 60432 |
| Valco Stove Corp | 815-469-2345 | 221 Industry Ave | Frankfort | IL | 60423 |
| Walnut Custom Homes | 815-379-2151 | 300 Wyanet Rd | Walnut | IL | 61376 |
| Walts Midwest Fabricators Inc | 815-962-4888 | 1205 18th Ave | Rockford | IL | 61104 |
| Weldments Inc Weldng | 815-633-3393 | 10720 N 2nd Rcfr | Rockford | IL | 61114 |
| Winnebago Welding Service | 815-335-2633 | 211 W Main | Winnebago | IL | 61088 |
| Woodstock Metal Prducts Company | 815-338-3000 | 542 Washington St | Woodstock | IL | 60098 |
| Youngberg Industries Inc | 815-544-2177 | 6863 Indy Dr | Belvidere | IL | 61008 |
