Large Fabrication
Large-Scale Metal Fabrication for Heavy, Complex, and Oversized Assemblies
American Alloy specializes in large fabrication projects up to 50 tons, delivering fully welded, machined, and assembled structures for industrial, energy, infrastructure, and OEM applications. With high-capacity cranes, large assembly bays, and fully integrated in-house capabilities, we build complex systems at scale—without outsourcing critical steps.
Capacity & Credentials
Up to 50-ton weldments
250,000+ sq. ft. manufacturing space
ITAR Registered
Dual U.S. manufacturing locations
In-house machining, welding, cutting & finishing
Over 250 employees
Built for Large, Complex Manufacturing Projects
Large fabrication requires more than size—it requires control, coordination, and precision at scale.
American Alloy manages large fabrication projects entirely in-house, reducing risk across welding, machining, forming, finishing, and final assembly. This ensures consistent quality, predictable timelines, and fewer supply chain handoffs.
We support customers across energy, defense, heavy equipment, food processing and manufacturing, automation, industrial infrastructure, and more.
Large Fabrication Applications
We fabricate large-scale welded and assembled systems such as:
- Industrial machinery frames and bases
- Conveyor and material handling systems
- Large weldments and structural skids
- Energy and utility equipment assemblies
- Industrial ovens and processing equipment
- Tanks, hoppers, and containment systems
- Electrical and control enclosures
- Food processing and sanitary equipment systems
- OEM machine platforms and automation systems
- Infrastructure and heavy industrial components
Built for Scale
American Alloy’s large fabrication capability is supported by:
- 70′ x 320′ main assembly bay
- 22′ under-hook crane height
- High-capacity overhead lifting systems
- Large-format welding and fabrication stations
- Integrated machining and finishing departments
- Dual manufacturing campuses (WI + WA)
This infrastructure allows us to handle complex builds from fabrication through final assembly without outsourcing critical steps.
Core Large Fabrication Capabilities
Heavy Weldments and Structural Fabrication
Fabrication of large, multi-component welded assemblies requiring precision alignment and structural integrity.
Key Capabilities:
- Large structural steel weldments
- Multi-process welding integration
- Tight-tolerance assembly of large components
- High-strength industrial applications
Large-Scale Assembly
Full system assembly of large mechanical structures and equipment.
Key Capabilities:
- 70′ x 320′ main assembly bay
- Overhead crane capacity for heavy lifts
- Sub-assembly and final system integration
- Mechanical, pneumatic, and component installation
Heavy Plate & Structural Processing
Processing and fabrication of thick materials and heavy structural components.
Key Capabilities:
- Thick plate steel fabrication
- Structural beam and frame integration
- Heavy-duty industrial component fabrication
Integrated Machining for Large Components
Precision machining of oversized fabricated assemblies.
Key Capabilities:
- CNC machining of large weldments
- In-house alignment and precision finishing
- Multi-axis machining support
Finishing for Large Assemblies
Coating and finishing systems for oversized components.
Key Capabilities:
- Large wet paint booths
- Powder coating systems
- Sand & bead blasting for surface prep
- Full assembly finishing workflows
Why Customers Choose Us for Large Fabrication
Large fabrication projects carry risk. We reduce that risk by controlling the entire manufacturing process in-house.
- Single-source manufacturing partner
- Reduced risk of cross-vendor delays
- Consistent quality control across all stages
- Engineering-to-production coordination
- Scalable capacity for complex builds
- U.S.-based manufacturing footprint
From Engineering to Final Assembly
Large fabrication projects follow a controlled, in-house workflow
- Engineering review and fabrication planning
- Precision cutting and forming
- Welding and structural assembly
- Machining and alignment
- Surface finishing and coating
- Final assembly and inspection
This integrated workflow ensures dimensional accuracy and structural integrity at scale.
Industries We Support
Energy & Industrial Infrastructure
Large equipment, processing systems, and structural assemblies for demanding environments.
Defense & ITAR-Regulated Manufacturing
Controlled, secure fabrication for mission-critical applications.
Automation & Equipment Builders
Large OEM machine systems and industrial automation platforms.
Food & Sanitary Processing
Large stainless systems, tanks, conveyors, and processing equipment.
Built for Precision at Scale
- AWS welding certification programs (D1.1, D1.2, D1.3, D1.6)
- ITAR registered
- In-house inspection and quality controls
- Experienced fabrication and welding teams
- Controlled stainless fabrication environments
What Sets American Alloy Apart in Large Fabrication
- Full in-house manufacturing (no outsourcing risk)
- Heavy lift and large bay capacity
- Multi-process integration (cutting → welding → machining → finishing)
- ITAR registered facility for controlled projects
- Experience with complex OEM and industrial systems
- U.S.-based dual facility footprint
Frequently Asked Questions
What is considered large fabrication at American Alloy?
We define large fabrication as welded and assembled structures requiring heavy lifting, large assembly space, and integrated multi-process manufacturing—up to 50 tons.
What is the largest size components you can fabricate?
We support large assemblies up to 50 tons using oversized fabrication bays and overhead crane systems.
Do you handle machining and finishing for large parts?
Yes. We provide full in-house machining, coating, and finishing services for large fabricated assemblies.
What industries require large fabrication?
Common industries include energy, defense, industrial equipment, automation, food processing, and infrastructure manufacturing.
Can you build complete systems or just components?
We build both. Many projects include full system fabrication, assembly, and finishing under one roof.
Need a Large Fabrication Partner You Can Trust?
When size, complexity, and precision matter, American Alloy delivers large-scale fabrication solutions built for performance and reliability.