NAICS 33231 - Plate Work and Fabricated Structural Product Manufacturing
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What is NAICS 33231
NAICS code 33231 covers establishments primarily engaged in the manufacturing of plate work and fabricated structural metal products. This includes prefabricated metal buildings, panels, structural metal components, and other metal plate work products used across various industries. Businesses operating in this sector typically specialize in metal fabrication, welding, cutting, and assembly of metal components tailored to specific engineering and architectural requirements. Government agencies often contract these services to support infrastructure projects, defense facilities, and public works that require durable, custom-fabricated metal structures and components. The industry's ability to produce prefabricated, modular, and standardized metal products enables efficient construction and maintenance of government assets.
Industry Classification for NAICS 33231
This industry comprises establishments primarily engaged in manufacturing one or more of the following: (1) prefabricated metal buildings, panels, and sections; (2) structural metal products; and (3) metal plate work products.
Breakdown for NAICS 33231
- Manufacture of prefabricated metal buildings and panels used in construction and infrastructure.
- Production of structural metal products including beams, columns, and framework components.
- Fabrication of custom metal plate work products for specialized industrial and government applications.
- Industry includes both small and large manufacturers with varying production capacities.
- Essential sector supporting public works, defense installations, and transportation infrastructure.
Included Activities for NAICS 33231
- Cutting, shaping, and welding metal plates and structural components.
- Assembling prefabricated metal building sections and panels.
- Producing structural metal parts such as beams, girders, and trusses.
- Applying surface treatments and coatings to fabricated metal products.
- Performing quality inspections and compliance testing for government standards.
- Custom fabrication of metal components based on engineering specifications.
- Packaging and delivering fabricated metal products to government project sites.
Business Types for NAICS 33231
- Metal fabrication shops specializing in structural components.
- Manufacturers of prefabricated metal buildings and modular structures.
- Contract metalworking firms serving government infrastructure projects.
- Small and medium enterprises focused on precision plate work fabrication.
- Defense contractors producing specialized metal assemblies.
Government Buyers for NAICS 33231
Federal, state, and local government agencies commonly purchase plate work and fabricated structural metal products. Key buyers include the Department of Defense for military installations and equipment, the General Services Administration for federal building projects, the Department of Transportation for infrastructure development, and local public works departments for municipal facilities. These agencies require high-quality, durable metal structures and components to meet stringent safety, performance, and regulatory standards. Contracts may support new construction, renovation, or maintenance of government-owned buildings, bridges, transportation infrastructure, and specialized facilities.
Contract Types & Procurement for NAICS 33231
Contracts awarded under NAICS 33231 typically include firm-fixed-price, indefinite delivery/indefinite quantity (IDIQ), and design-build agreements. Procurement methods often involve competitive sealed bidding, negotiated procurements, and small business set-asides to encourage participation from qualified manufacturers. Contract values vary widely depending on project scope, ranging from small fabrication jobs under $100,000 to large-scale prefabricated building projects exceeding several million dollars. Government buyers prioritize compliance with quality certifications and timely delivery schedules, influencing contract terms and performance measures.
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