HVAC DUCT FABRICATION IN PASCAGOULA, MS
JMC Fabrication is a SMACNA-compliant HVAC duct fabricator serving commercial contractors, EPC firms, and large-scale industrial projects across the Gulf Coast and Southeast. From our 50,000 sq ft shop in Pascagoula, MS, we produce rectangular, round, and oval duct systems at commercial volume — with the engineering support to coordinate directly with your mechanical drawings.
- Rectangular duct systems in all SMACNA classes
- Round duct and fittings
- Oval duct
- Elbows, transitions, tees, and custom fittings
- High-volume output for large commercial mechanical packages
- Elbows, transitions, tees, taps, and offsets
- Plenums, drops, and equipment connections
- Access doors, volume dampers, and turning vanes
- Flanged and slip-and-drive transverse joints
- Tie rods, standing seams, and reinforcement per SMACNA schedules
- Galvanized steel: the SMACNA-standard material for commercial HVAC duct — durable, code-compliant, and cost-effective
- Stainless steel: available for specialty applications including food service, chemical environments, and high-humidity installations
- Gauge selection per SMACNA duct class and static pressure rating
Beyond commercial HVAC, JMC's shop background is heavy industrial fabrication, and that carries directly into industrial ductwork. For plants, shipyards, and process facilities across the Gulf Coast, we build:
- Welded, heavy-gauge duct for high-static and high-temperature service
- Dust collection and material-handling ductwork
- Fume, exhaust, and process ventilation duct
- Stainless steel duct for corrosive, marine, and washdown environments
- Custom industrial round and spiral duct with welded seams
SMACNA (Sheet Metal and Air Conditioning Contractors National Association) standards govern commercial duct construction — material gauge, seam types, transverse joint options, and reinforcement schedules. SMACNA compliance is required on virtually all commercial mechanical specifications. JMC fabricates to SMACNA standards across our full duct product line, and our documentation reflects it.
JMC's in-house engineering team coordinates directly with your mechanical package:
- Work from customer-supplied drawings or JMC-generated shop drawings
- Revit BIM coordination available for clash-free installation
- Duct layout review and RFI support during construction
- Large commercial office, institutional, retail, and warehouse mechanical systems
- Industrial HVAC and ventilation for manufacturing facilities
- GC and mechanical subcontractor supply for large-scale Gulf Coast and Southeast projects
- Specialty systems for unique mechanical requirements
JMC's 50,000 sq ft Pascagoula facility is sized for large commercial duct packages. Our production capacity and in-house engineering support multi-phase commercial projects. Contact us with your scope and timeline for a lead time estimate.
- July 22, 2026Commercial Duct Fabrication Lead Times: What Drives Them and How to Compress ThemThe real drivers of commercial duct fabrication lead time and how mechanical contractors can compress it, covering drawings, material, and shop capacity.
- July 15, 2026Rectangular, Round, and Spiral Duct: Choosing the Right Shape for Commercial HVACHow duct shape affects airflow, leakage, space, noise, and cost, comparing rectangular, round, spiral, and flat-oval duct.
Working on a project that combines services? Explore related capabilities at JMC:
- Galvanized Steel FabricationSMACNA-compliant galvanized steel duct, sheet metal, and custom components from Pascagoula, MS. Corrosion-resistant fabrication for commercial HVAC and industrial applications.
- Stainless Steel FabricationNAVSEA and AWS certified stainless steel fabrication for marine, oil & gas, and specialty industrial applications. 304 and 316 stainless. 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.
- 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.
- All Fabrication ServicesOverview of JMC's full fabrication capabilities, including HVAC duct, pipe spools, and custom metalwork.
What types of HVAC duct does JMC Fabrication produce?
JMC produces rectangular, round, and oval duct systems in all SMACNA duct classes, along with fittings, elbows, transitions, and custom configurations for commercial and industrial mechanical systems.
Is JMC Fabrication SMACNA compliant?
Yes. JMC fabricates HVAC duct in compliance with SMACNA standards, including proper gauge selection, seam types, and reinforcement for each duct class and static pressure requirement.
What materials does JMC use for duct fabrication?
JMC primarily uses galvanized steel for commercial HVAC duct per SMACNA standards. Stainless steel is available for specialty applications including food service, chemical environments, and high-humidity installations.
Can JMC handle large-volume commercial duct orders?
Yes. JMC operates a 50,000 sq ft fabrication facility in Pascagoula, MS with the capacity for large-volume commercial duct packages. We serve general contractors and mechanical subcontractors on projects across the Gulf Coast and Southeast.
Does JMC provide engineering drawings for duct systems?
Yes. JMC can coordinate with customer-supplied mechanical drawings or generate shop drawings in-house. Revit BIM coordination is available for clash-free installation support.
Does JMC fabricate industrial and welded duct, not just commercial HVAC?
Yes. In addition to SMACNA commercial HVAC duct, JMC builds welded, heavy-gauge industrial duct for dust collection, fume and process exhaust, and high-static or high-temperature service, drawing on our heavy industrial fabrication background on the Gulf Coast.
Can JMC build stainless steel duct for corrosive or marine environments?
Yes. We fabricate stainless steel duct for corrosive, marine, washdown, and high-humidity applications where galvanized steel is not suitable, including food service and chemical process environments.