| A & A Welding Inc | 410-563-1750 | 4200 E Lombard St | Baltimore | MD | 21224 |
| Abingdon Welding Inc | 410-679-8777 | PO Box 214 | Joppa | MD | 21085 |
| Arbutus Winklers Welding Service | 410-247-5191 | 4307 Southwestern Blvd | Arbutus | MD | 21229 |
| Artis Towing | 410-362-0116 | 4200 Edmondson Ave | Baltimore | MD | 21229 |
| Baltimore Steel Erectors Inc | 410-335-0556 | 11006 Red Lion Rd | White Marsh | MD | 21162 |
| Brewer Welding | 410-531-3100 | 13070 Triadelphia Rd | Ellicott City | MD | 21042 |
| Brocker Steel Co | 410-288-5500 | 6900 Quad Ave | Baltimore | MD | 21237 |
| Brookdale Homes Inc | 410-658-6123 | 20 Boxwood Ln | Rising Sun | MD | 21911 |
| Carls Welding Shop | 410-922-4351 | 9922 Lyons Mill Rd | Randallstown | MD | 21133 |
| Chesapeake Marine Drive Corp | 410-625-1022 | 611 W Ostend St | Baltimore | MD | 21230 |
| Chesapeake Steel Inc | 410-549-2970 | 6505 Kenmar Dr | Sykesville | MD | 21784 |
| Chesco | 410-342-4205 | 3707 E Monument St | Baltimore | MD | 21205 |
| Cox Steel Services | 410-526-2906 | 2929 Industrial Park Dr | Finksburg | MD | 21048 |
| Cox Steel Services | 410-840-8084 | 406-D Lucabaugh Mill Rd | Westminster | MD | 21157 |
| Creative Metal Fabrication And Sales Inc | 410-661-8667 | 2706 2nd Ave | Parkville | MD | 21234 |
| Dennys Welding Service | 410-335-8541 | 10509 Bird Rv Rd | Chase | MD | 21027 |
| Dovco Industrial Fabricators | 410-625-6000 | 1700 Ridgely St | Baltimore | MD | 21230 |
| Dovco Industrial Fabricators | 410-752-2017 | 1700 Ridgely St | Baltimore | MD | 21230 |
| Dundalk Winkler Welding | 410-285-3265 | 1755 Stengel Ave | Dundalk | MD | 21222 |
| Fabricators Steel | 410-342-6345 | 1700 S Haven St | Baltimore | MD | 21224 |
| Fitzroy George F Jr | 410-398-0146 | 938 W Pulaski Hwy | Elkton | MD | 21921 |
| Freds Welding & Steel Inc | 410-272-1283 | 1609 S Philadelphia Blvd | Aberdeen | MD | 21001 |
| Freds Welding & Steel Inc | 410-575-7606 | 1609 S Philadelphia Blvd | Aberdeen | MD | 21001 |
| Free State Steel Inc | 410-675-7600 | 4010 Danville Ave | Baltimore | MD | 21231 |
| G & L Fabricators Inc | 410-833-4771 | 2914 Dede Rd | Finksburg | MD | 21048 |
| G & L Fabricators Inc | 410-880-4124 | 150 Washington Blvd S | Laurel | MD | 20707 |
| Greif Bros Corporation | 410-477-8600 | 2500 Grays Rd | Sparrows Point | MD | 21222 |
| Grundy Steel Fabricators Inc | 410-366-2394 | 2017 Clipper Park Rd | Baltimore | MD | 21211 |
| H & M Builders | 410-653-2278 | 1400 Greenspring Valley Rd | Pikesville | MD | 21208 |
| Hancock Steel Joists | 410-793-0110 | 1921 Topango Pl | Crofton | MD | 21114 |
| Huber Welding Service | 410-771-9353 | 10840 Williamson Ln | Cockeysville | MD | 21030 |
| Iron Masters Inc | 410-355-6468 | 3401 S Hanover St | Baltimore | MD | 21225 |
| Johnstown Welding & Fabrication Inc | 410-360-9530 | 1495 Ascot Dr | Pasadena | MD | 21122 |
| Jorgensen Roy Associates Inc | 410-768-8300 | 508-A Digiulian Blvd | Glen Burnie | MD | 21061 |
| Kal Med Fabricators | 410-789-2210 | 6023 Olson Rd | Brooklyn | MD | 21225 |
| Kdc Welding | 410-538-6815 | 2109 Emmorton Park Dr | Edgewood | MD | 21040 |
| Kenwood Welding Co | 410-686-3760 | 8402 Philadelphia Rd | Baltimore | MD | 21237 |
| L & S Welding Co Inc Facsimilie Line | 410-235-5112 | 2401 Homewood Ave | Baltimore | MD | 21218 |
| Leonard Metal Products | 410-335-1548 | 10711 Philadelphia Rd | White Marsh | MD | 21162 |
| Liberty Steel Works | 410-641-0978 | 7968 Libertytown Rd | Berlin | MD | 21811 |
| Litchfield Welding & Steel Fabricating Inc | 410-437-3435 | 2545 Mountain Rd | Pasadena | MD | 21122 |
| M S Steel Co | 410-358-0407 | 3041 Fallstaff Rd | Baltimore | MD | 21209 |
| Machine Specialists Inc | 410-876-1637 | 1843 Old Taneytown Rd | Westminster | MD | 21158 |
| Major Equipment Company Inc | 410-838-7505 | 2301 Industry Ct | Bel Air | MD | 21014 |
| Maryland Metal Products | 410-391-9664 | 8570 Contractors Rd | Rosedale | MD | 21237 |
| Maryland Steel Inc | 410-321-1584 | 320 E Towsontown Blvd | Towson | MD | 21286 |
| Mc Namara Fabricators Inc | 410-385-0166 | 2001 Kloman St | Baltimore | MD | 21230 |
| Metal Fabrications Inc | 410-342-8400 | 4301 E Fayette St | Baltimore | MD | 21224 |
| Metro Antenna Technology Inc | 410-732-2041 | 4401 Eastern Ave | Baltimore | MD | 21224 |
| Metro Antenna Technology Inc | 410-796-7638 | 7713 Old Woodstock Ln | Ellicott City | MD | 21043 |
| Midlantic Metal Fabricators Inc Dover Rd Easto | 410-822-0414 | Dover Rd | Easton | MD | 21601 |
| Mt Alpha Corp | 410-536-0416 | 2000 Halethorpe Ave | Arbutus | MD | 21227 |
| New Jersey Steel Fabrication Division N | 410-792-7335 | 8333 Zug Rd | Bowie | MD | 20715 |
| Nicholas J Bouras Inc | 410-995-3864 | 5550 Sterrett Pl | Columbia | MD | 21044 |
| Perry Steel Sales Inc | 410-833-1930 | 3000 Gamber Rd | Reisterstown | MD | 21136 |
| Perry Structural Products Inc | 410-833-2151 | 3000 Gamber Rd | Finksburg | MD | 21048 |
| Philipp Engineering Co Inc | 410-732-6050 | 1200 N Macon St | Baltimore | MD | 21205 |
| R & R Fabrication | 410-535-2307 | 170 Schooner Ln | Prince Frederick | MD | 20678 |
| Runyeon R Inc | 410-477-0330 | 1712 Pin Oak Ave | Baltimore | MD | 21222 |
| S A R Metal Products Co | 410-342-4477 | 110 S Regester St | Baltimore | MD | 21231 |
| Smittys Ornamental Iron Co | 410-243-0916 | 2200 Sherwood Ave | Baltimore | MD | 21218 |
| Structural Steel Fabricators & Building Suppli | 410-859-5900 | 1739 W Nursery Rd | Glen Burnie | MD | 21061 |
| Three Star Iron Works | 410-563-4400 | 1400 Eastern Ave | Baltimore | MD | 21231 |
| Top Hat Towning | 410-462-5996 | 2750 W North Ave | Baltimore | MD | 21216 |
| Vulcraft Sales Corp | 410-461-7502 | 9025 Chevrolet Dr | Ellicott City | MD | 21042 |
| Watson Steel Products Inc | 410-321-7273 | 24 Linden Ter | Towson | MD | 21286 |
| Wilson Point Steel Inc | 410-354-4411 | 3501 7th St | Baltimore | MD | 21225 |
| Wilton Corp | 410-833-8500 | 2925 Industrial Park Dr | Finksburg | MD | 21048 |
