| Al-Jon Inc | 515-682-4506 | Ottumwa Industrial Airport | Ottumwa | IA | 52501 |
| Bear David Inc | 515-262-8251 | 600 SE 18th St | Des Moines | IA | 50317 |
| Central Iowa Machine Shop Inc | 515-752-7615 | 801 N 4th Ave | Marshalltown | IA | 50158 |
| Cheers Carl R | 515-262-4939 | 1850 SE 72nd St | Runnells | IA | 50237 |
| Clark Industries Ltd | 515-265-3533 | 5330 NE 22nd St | Des Moines | IA | 50313 |
| Contractors Steel Corporation | 515-262-2000 | 1901 Easton Blvd | Des Moines | IA | 50316 |
| Countryside Welding | 515-775-3425 | 16664 Highway 3 | Allison | IA | 50602 |
| Custom Steel Service | 515-233-1075 | 217 High Ave | Ames | IA | 50010 |
| Des Moines Metal Fabricating | 515-244-5474 | 818 NE Broadway Ave | Des Moines | IA | 50313 |
| Des Moines Portable Welding | 515-255-9280 | 2605 56th St | Des Moines | IA | 50310 |
| Des Moines Steel Co | 515-246-8004 | 110 Clark St | Des Moines | IA | 50314 |
| Deters Tower Service | 515-270-2342 | 3815 100th St | Des Moines | IA | 50322 |
| Hawk Metal Prod | 515-225-3008 | 625 S 19th St | West Des Moines | IA | 50265 |
| Hawl Manufacturing Co | 515-424-3456 | Hwy 106 W | Mason City | IA | 50401 |
| Hulin J L Company | 515-479-2837 | 101 Center Rd | Marshalltown | IA | 50158 |
| Iron Works Ltd | 515-288-8981 | 1924 SW 2nd St | Des Moines | IA | 50315 |
| Kluesner Portable Welding Co | 515-255-1474 | 512 Elm St | West Des Moines | IA | 50265 |
| Lemar Industries Corp | 515-266-7264 | 1425 E Aurora Ave | Des Moines | IA | 50313 |
| Majona Corp | 515-987-4537 | 125 10th St | Waukee | IA | 50263 |
| Metal Doctor The | 515-923-3900 | 645 W 3rd St | Garner | IA | 50438 |
| Middle River Steel | 515-764-2705 | 245 N Hwy 28 | Martensdale | IA | 50160 |
| Mid-States Steel Corp | 515-432-1646 | 2515 Industrial Park Rd | Boone | IA | 50036 |
| Mueller Paul Company | 515-342-6531 | 1000 Tieken Dr | Osceola | IA | 50213 |
| Pedelty Blower Co | 515-423-3372 | 216 2nd St SW | Mason City | IA | 50401 |
| Quick Performance | 515-232-0126 | RR 4 | Ames | IA | 50014 |
| R & J Mobile Homes Inc | 515-285-0660 | 6006 SE 14th St | Des Moines | IA | 50320 |
| Ra Mark Industries Inc | 515-789-4411 | 375 State St | Dexter | IA | 50070 |
| Ra-Mark Industries Inc | 515-243-6942 | 375 State | Dexter | IA | 50070 |
| Ray-Man Inc | 515-636-3014 | 515 W Broadway Ave | Keota | IA | 52248 |
| Ring-O-Matic Mfg Co Inc | 515-628-1515 | Fifield Rd & W 10th | Pella | IA | 50219 |
| State Steel Supply Co Of Des Moines | 515-264-0000 | 4819 NE 17th Ct | Des Moines | IA | 50313 |
| Steel Fabrication Co | 515-288-5117 | 1350 Tuttle St | Des Moines | IA | 50309 |
| Sunset Sales Inc | 515-752-6301 | 2577-240th St | Marshalltown | IA | 50158 |
| Tim Company | 515-278-0007 | 8601 Alpine Dr | Urbandale | IA | 50322 |
| Vulcraft Sales Corp | 515-270-2500 | 3839 Merle Hay Rd | Des Moines | IA | 50310 |
| Werts Corp | 515-664-2644 | 919 W Chestnut St | Bloomfield | IA | 52537 |
| Winbco Tank Company | 515-683-1855 | 1200 E Main St | Ottumwa | IA | 52501 |
