| Steel Building - Whirlwind Steel Buildings Whirlwind Steel Buildings is a manufacturer of metal building components, metal roofing and metal wall panels. http://www.whirlwindsteel.com |
| Catnic Manufacturer and supplier of steel lintels, stainless steel mesh, and other building products and components. http://www.catnic.com/ |
| Roll Formed Parts and Shapes Directory of manufacturers of roll formed parts and materials. http://www.rollformedparts.com/ |
| Steel Structures Technology Center Consulting engineering firm specializing in technical training for steel building and bridge design, fabrication, construction, and inspection. http://www.steelstructures.com/ |
| US Steel Construction Supplier of coated steel sheet products for use in roofing, siding, and framing applications. http://www.ussteel.com/ |