- ACME Structural, Inc.
 - Steel fabrications for most industrial and commercial marketplaces. - Acrow Misr
- Makers of metallic scaffolding, shuttering and concrete formwork systems, heavy and light steel structure works, and shelving and racking systems.
- Advance Informatics
- Offering architectural and mechanical drafting, structural design and detailing, and GIS mapping using Autocad computer design.
- Airport Contractors
- Provides steel buildings, aeroplane hangers, horse arenas, storage buildings, warehouses, machine shop buildings, and more.
- Alvin Industrial Sales
- Manufactures AIS and key clamps, plastic end caps, pipe fittings, railings, outdoor shelters, lighting grids, and more.
- American Bridge Company
- Provides design build, management, and contracting for facilities, structures, rail, civil, and marine projects. Also manufactures structural steel and steel grid bridge decks.
- American Structural Metals, Inc.
- Structural and decorative steel fabricators.
- Art Metal Company
- Fabrication and erection of steel structures.
- B&G Staalkonstruktie b.v.
- Design, delivery, and erection of steel structures for industrial and civil building projects.
- Beck Steel
- Provides structural and miscellaneous steel fabrication.
- Bouras Industries, Inc.
- Specialising in steel deck, joists, and siding.
- Christie Constructors, Inc.
- Fabrication shop with advanced robotic welding capabilities specialising in structural steel projects involving bridges, buildings, and other structures.
- Consolidated Systems, Inc.
- Manufactures steel construction products, specifically steel roof decking and framing for commercial, industrial, residential, and institutional building projects.
- DCE Technical Services
- Specialises in the field of steel structures and wrought metals used in transport, energy distribution, telecommunications, and road and railway bridges as well as general construction.
- Eberl Iron Works, Inc.
- Providing metal products for structural support, safe walking surfaces and signage. Also specialises in the shearing and forming of sheets and plates.
- Egger Steel Company
- Structural steel fabrication and service centre.
- Filzmoser GmbH
- Manufacturers of reinforcing systems for constructions and lattice girder welding machines.
- Formit Steel Co.
- Structural steel fabricating and finishing.
- Fought & Company, Inc.
- Specialise in bridge and structural steel fabrication.
- FRAMECAD Solutions
- Provides structural steel frame design and solutions.
- Hammerts Iron Works
- Fabricated structural steel for the construction of large commercial, industrial and assembly buildings.
- High Steel Structures, Inc.
- Fabricator of steel bridge superstructures in North America.
- Hirschfeld Steel Co., Inc.
- Structural steel fabricator and supplier of metal panels, pre-engineered metal buildings, and steel components, with multiple plant locations.
- Hyundai Metal
- Manufacturer of tube, scaffolding, and formwork.
- Industrial Steel Inc.
- Provider of structural and miscellaneous steel fabrication and erection.
- Infra-Metals
- Structural steel service centre that processes and distributes tubing, I beams, rebar, MC channels and more. Serving the East Coast and the Caribbean.
- Jackson-Cook
- Specialist in steel fabrication & erection.
- Kee Industrial Products, Inc.
- Manufacturers of guardrailing, balustrading, playgrounds, and modular roof edge protection systems made from slip-on malleable iron and aluminium fittings.
- Keeler Iron Works, Inc.
- Fabricators of steel structures, specialising in billboards and signs.
 Lindapter International
- Manufacturer of technically advanced steelwork connection systems.- Lyndon Steel Company
- Fabricating structural steel, joist, and deck.
- MBM Fabricators Company Incorporated
- Specialises in fabrication and erection of structural steel and miscellaneous iron for the industrial, commercial, and design/build markets.
- McCarthy Engineering
- Specialises in the design and manufacture of container handling equipment. Also manufactures air receivers and structural steel work.
- Membrane Steel Engineering Inc. (MSEI)
- Specialises in tensioned structure engineering.
- Midwest Steel, Inc.
- Offers services ranging from fabrication and erection to design, building and trade management.
- Multidocking
- Specialises in international aircraft and airline docking systems and hangars designed and supplied throughout the world.
- Nusteel Limited
- Supplier of steel footbridges and specialised structures.
- Oakley Steel Products Co.
- Steel fabricators specialising in rolling or forming steel structurals and plates.
- Omega Joists Inc.
- Produces steel joists from high strength, cold formed chord sections, and hollow structural web members.
- Paragon Steel
- Structural steel distributor specialising in service and support to manufacturers and end-users in the Western United States.
- Quinlan Enterprises
- Constructing structural steel buildings providing service mainly in the southeast area, stretching from South Carolina to Florida.
- R.F. Stearns, Inc.
- Provides steel design build services.
- Rosette Systems Ltd.
- Supplier of manufacturing applications for building material production and system construction. Light gauge steel metal and sheet metal products.
- Schueck Steel, Co.
- Construction and fabrication company.
- Schuff International
- Structural steel and plate fabrication and erection.
- Severfield-Reeve
- Offers structural steelwork fabrication and engineering in the U.K. and abroad.
- Sismo Building Technology
- Manufactures and distributes a flexible building system based on wire lattices and concrete, serving to receive infill panels which form shuttering for structural filling material.
- South Shore Iron Works, Inc.
- Steel fabricators specialising in fast track, fab, and detailing.
- Southern Iron Works, Inc.
- Structural steel fabricator. Serving the East Coast.
- Sowles Company
- Steel erection, rigging, millwright, and equipment installation firm.
- Steel Fabricators of Monroe, Inc.
- Structural and miscellaneous steel fabricators.
- Steel of West Virginia, Inc.
- Manufacturer of structural beams, channels and special shape steel sections.
- SteelFab, Inc
- Produces structural steel for major construction projects, from skyskrapers to power plants. Production facilities across the Southeast.
- Steward Steel.
- Structrual steel fabrication company.
- Stupp Bros., Inc. (2)
- Sulta Manufacturing
- Custom steel fabricator specialising in structural and plate steel, chain mill crushers, and agri-chemical equipment.
- Supermetal Structures
- Structural steel fabricator and erector specialising in industrial buildings and complex structures.
- TDS Industrial Services
- Services include steel detailing and Strucad design serving customers across North America and Europe.
- Techno Steel, LLC
- Structural steel design and fabrication for process plants.
- Thompson Engineering Services Limited
- Offers steel fabrication and site installation services.
- Trans-Tex Fabricating Company
- Fabricates structural steel for commercial and industrial customers. Specialises in conveyors, stairs, platforms, and cage ladders.
- Valley Joist, Inc.
- Manufactures joists, shortspans, longspans, and girders as well as deck.
- W M Structural Services
- Provides computer aided structural steel detailing services.
- Williams Industries (2)
- WMK & Company
- Offers fabrication, design, supply, and erection services.
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