STRUCTURAL STEEL FABRICATION SERVICES
Structural steel work demands accurate shop drawings, AWS D1.1 certified welding, and the documentation to back it up. JMC Fabrication produces structural steel assemblies for industrial, commercial, and marine projects from our 50,000 sq ft shop in Pascagoula, MS: wide flange, HSS, plate, equipment supports, platforms, and custom assemblies fabricated to spec and delivered ready to erect.
JMC's structural steel work spans the full range of industrial and commercial assemblies:
- Wide flange (W-shape) beams and columns to project drawings
- Hollow structural sections (HSS): square, rectangular, and round tube
- Equipment supports, skids, and pipe rack steel
- Industrial platforms, walkways, ladders, and stairs
- Plate fabrications for tanks, hoppers, chutes, and enclosures
- Custom structural assemblies and one-off fabricated weldments
JMC's structural steel fabrication aligns with AISC 360 (Specification for Structural Steel Buildings), AISC 303 (Code of Standard Practice), and AWS D1.1 (Structural Welding Code for Steel). Marine structural work is delivered to NAVSEA specifications where required. Detail drawings, weld procedures, and inspection records reconcile against the controlling project specification.
- A36 carbon structural: the everyday workhorse for general structural steel
- A572 Grade 50: higher-strength low-alloy structural where weight reduction or capacity matters
- A992: modern wide-flange standard, common spec for new structural buildings
- A500 Grade B and C: HSS tube for columns, braces, and architectural exposed work
- Plate grades per project specification (A36, A572, A516 for pressure-related applications)
JMC's in-house engineering team supports structural packages end to end:
- Shop drawing review and mark-up against architect or engineer of record drawings
- Connection design verification per AISC standards
- Weld procedure specification (WPS) review and qualification per AWS D1.1
- BIM coordination where 3D models are available
- Erection drawings and field weld details
- AWS D1.1 certified structural welders on all production work
- Visual inspection of all welds per code
- NDE (UT, MT, PT) on full-penetration and critical welds per project specification
- Material traceability from MTRs through shipped product
- Documentation packages aligned with AISC and AWS requirements
- Industrial plant structural: pipe racks, equipment supports, mezzanines
- Marine and shipyard structural assemblies
- Commercial and light industrial buildings
- Custom skids and modular equipment frames
- Platforms, walkways, ladders, and code-compliant industrial stairs
Structural steel fabrication and pressure-vessel work look similar from the outside but follow different codes and welder qualifications. Structural runs to AWS D1.1; pressure work runs to ASME Section IX. JMC qualifies welders and procedures to both, which is why structural skids that include pressure-containing piping can be built as one integrated package without the typical handoffs between fabricators.
Working on a project that combines services? Explore related capabilities at JMC:
- Custom Metal FabricationCustom metalwork from concept through delivery — pump skids, penetrations, flanges, subbases, copper assemblies. AWS and NAVSEA certified. 50,000 sq ft shop in Pascagoula, MS.
- Carbon Steel FabricationCarbon steel fabrication for pipe spools, HVAC duct, structural components, and custom weldments. ASTM A36, A53, A106. AWS certified welding from Pascagoula, MS.
- Stainless Steel FabricationNAVSEA and AWS certified stainless steel fabrication for marine, oil & gas, and specialty industrial applications. 304 and 316 stainless. Pascagoula, MS.
- All Fabrication ServicesOverview of JMC's full fabrication capabilities, including HVAC duct, pipe spools, and custom metalwork.
What structural steel codes does JMC Fabrication work to?
JMC fabricates structural steel to AISC 360, AISC 303, and AWS D1.1. Marine structural work is delivered to NAVSEA specifications where the project requires it. Project specifications that reference other standards are reviewed on a case-by-case basis at quote.
Does JMC provide structural steel shop drawings?
Yes. JMC's in-house engineering team reviews and marks up shop drawings against the engineer of record's drawings, develops connection details, and produces erection drawings as part of the fabrication package.
Can JMC fabricate combined structural and piping skids?
Yes. JMC qualifies welders and procedures to both AWS D1.1 (structural) and ASME Section IX (pressure), so structural skids with pressure-containing pipe or vessel components can be built as one integrated package without farming portions out to a separate fabricator.
What sizes and weights can JMC handle?
Our 50,000 sq ft Pascagoula, MS facility handles structural assemblies up to truckable size. For larger assemblies, JMC fabricates in shippable modules and provides field weld details for site assembly. Contact us with project specifics to confirm capacity for your scope.