Prefabricated Metal Building and Component Manufacturing
Description
Establishments in the prefabricated metal building and component manufacturing sector specialize in designing and producing modular structures and essential parts used for various industrial, commercial, and agricultural applications. These facilities focus on fabricating steel or metal panels, trusses, columns, beams, and roof sections that can be engineered for speed of assembly and structural efficiency. Typical business activities involve cutting, welding, bending, and assembling these metal components within factory settings before shipping them to construction sites for final integration. Operators range from small, single-plant suppliers catering to local contractors to large national enterprises managing nationwide distribution networks. Many companies also engage in offering value-added services such as site supervision or design consultation alongside their core manufacturing. The scale of operations varies significantly, with some entities concentrating solely on specific structural elements like pre-engineered trusses, while others provide complete building solutions including flooring and wall assemblies. These businesses play a critical role in modernizing the built environment by reducing on-site labor time and enhancing weather protection for buildings. The industry supports diverse markets, including warehousing, logistics hubs, and specialized industrial storage where durability and rapid deployment are paramount considerations for business success.
Hierarchy
| Code | Title | Description |
|---|---|---|
| 33 | Manufacturing 2-digit sector | The Sector as a Whole The Manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical transformation of materials, substances, or components into new products. The assembling of component parts of manufactured products is considered manufacturing, except in cases where the activity is appropriately classified in Sector 23, Construction. Establishments in the Manufacturing sector are often described as plants, factories, or mills and characteristically use power-driven machines and material handling equipment. However, establishments that transform materials or substances into new products by hand or in the worker's home and those engaged in selling to the general public products made on the same premises from which they are sold, such as bakeries, candy stores, and custom tailors, may also be included in this sector. Manufacturing establishments may process materials or may contract with other establishments to process their materials for them. Both types of establishments are included in manufacturing. Selected industries in the Manufacturing sector are comprised solely of establishments that process materials for other establishments on a contract or fee basis. Beyond these dedicated contract manufacturing industries, establishments that process materials for other establishments are generally classified in the Manufacturing industry of the processed materials. The materials, substances, or components transformed by manufacturing establishments are raw materials that are products of agriculture, forestry, fishing, mining, or quarrying as well as products of other manufacturing establishments. The materials used may be purchased directly from producers, obtained through customary trade channels, or secured without recourse to the market by transferring the product from one establishment to another, under the same ownership. The new product of a manufacturing establishment may be finished in the sense that it is ready for utilization or consumption, or it may be semi-finished to become an input for an establishment engaged in further manufacturing. For example, the product of the alumina refinery is the input used in the primary production of aluminum; primary aluminum is the input to an aluminum wire drawing plant; and aluminum wire is the input for a fabricated wire product manufacturing establishment. The subsectors in the Manufacturing sector generally reflect distinct production processes related to material inputs, production equipment, and employee skills. In the machinery area, where assembling is a key activity, parts and accessories for manufactured products are classified in the industry of the finished manufactured item when they are made for separate sale. For example, an attachment for a piece of metalworking machinery would be classified with metalworking machinery. However, component inputs from other manufacturing establishments are classified based on the production function of the component manufacturer. For example, electronic components are classified in Subsector 334, Computer and Electronic Product Manufacturing, and stampings are classified in Subsector 332, Fabricated Metal Product Manufacturing. Manufacturing establishments often perform one or more activities that are classified outside the Manufacturing sector of NAICS. For instance, almost all manufacturing has some captive research and development or administrative operations, such as accounting, payroll, or management. These captive services are treated the same as captive manufacturing activities. When the services are provided by separate establishments, they are classified in the NAICS sector where such services are primary, not in manufacturing. The boundaries of manufacturing and the other sectors of the classification system can be somewhat blurry. The establishments in the Manufacturing sector are engaged in the transformation of materials into new products. Their output is a new product. However, the definition of what constitutes a new product can be somewhat subjective. As clarification, the following activities are considered manufacturing in NAICS: <table width=100%><tr><td width=10%> </td><td><dl><dt style='padding-left: 10px; text-indent: -10px;'>Milk bottling and pasteurizing;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Water bottling and processing;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Fresh fish packaging (oyster<br/> shucking, fish filleting);</dt><dt style='padding-left: 10px; text-indent: -10px;'>Apparel jobbing (assigning<br/> materials to contract<br/> factories or shops for<br/> fabrication or other contract<br/> operations) as well as<br/> contracting on materials<br/> owned by others;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Printing and related activities;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Ready-mix concrete production;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Leather converting;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Grinding lenses to<br/> prescription;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Wood preserving;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Lapidary work for the trade;</dt></dl></td><td width=10%> </td><td><dl><dt style='padding-left: 10px; text-indent: -10px;'>Electroplating, plating, metal<br/> heat treating, and<br/> polishing for the trade;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Fabricating signs and<br/> advertising displays;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Rebuilding or remanufacturing<br/> machinery (i.e., automotive<br/> parts);</dt><dt style='padding-left: 10px; text-indent: -10px;'>Making manufactured homes<br/> (i.e., mobile homes) or<br/> prefabricated buildings,<br/> whether or not assembling/<br/> erecting at the customers'<br/> site;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Ship repair and renovation;</dt><dt style='padding-left: 10px; text-indent: -10px;'>Machine shops; and</dt><dt style='padding-left: 10px; text-indent: -10px;'>Tire retreading.</dt></dl></td><td width=10%> </td></tr></table> Conversely, there are activities that are sometimes considered manufacturing, but which for NAICS are classified in another sector (i.e., not classified as manufacturing). They include: 1. Logging, classified in Sector 11, Agriculture, Forestry, Fishing and Hunting, is considered a harvesting operation; 2. Beneficiating ores and other minerals, classified in Sector 21, Mining, Quarrying, and Oil and Gas Extraction, is considered part of the activity of mining; 3. Constructing structures, assembling prefabricated buildings, and fabricating at the construction site by contractors are classified in Sector 23, Construction; 4. Breaking bulk and reselling in smaller lots, including packaging, repackaging, or bottling products, such as liquors or chemicals; assembling and selling computers on a custom basis; sorting and reselling scrap; mixing and selling paints to customer order; and cutting metals to customer order for resale are classified in Sector 42, Wholesale Trade, or Sector 44-45, Retail Trade; and 5. Publishing and the combined activity of publishing and printing, classified in Sector 51, Information, transform information into a product for which the value to the consumer lies in the information content, not in the format in which it is distributed (i.e., the book or software compact disc). |
| 332 | Fabricated Metal Product Manufacturing 3-digit subsector | Industries in the Fabricated Metal Product Manufacturing subsector transform metal into intermediate or end products, other than machinery, computers and electronics, and metal furniture, or treat metals and metal formed products fabricated elsewhere. Important fabricated metal processes are forging, stamping, bending, forming, and machining, used to shape individual pieces of metal; and other processes, such as welding and assembling, used to join separate parts together. Establishments in this subsector may use one of these processes or a combination of these processes. The NAICS structure for this subsector distinguishes the forging and stamping processes in a single industry. The remaining industries in the subsector group establishments based on similar combinations of processes used to make products. The manufacturing performed in the Fabricated Metal Product Manufacturing subsector begins with manufactured metal shapes. The establishments in this subsector further fabricate the purchased metal shapes into a product. For instance, the Spring and Wire Product Manufacturing industry starts with wire and fabricates such items. Within the Manufacturing sector there are other establishments that make the same products made by this subsector; only these establishments begin production further back in the production process. These establishments have a more integrated operation. For instance, one establishment may manufacture steel, draw it into wire, and make wire products in the same establishment. Such operations are classified in the Primary Metal Manufacturing subsector. |
| 3323 | Architectural and Structural Metals Manufacturing 4-digit industry group | This industry group comprises establishments primarily engaged in manufacturing one or more of the following: (1) prefabricated metal buildings, panels, and sections; (2) structural metal products; (3) metal plate work products; (4) metal framed windows (i.e., typically using purchased glass) and metal doors; (5) sheet metal work; and (6) ornamental and architectural metal products. |
| 33231 | Plate Work and Fabricated Structural Product Manufacturing 5-digit NAICS industry | 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. |
| 332311 | Prefabricated Metal Building and Component Manufacturing 6-digit U.S. detail | Establishments in the prefabricated metal building and component manufacturing sector specialize in designing and producing modular structures and essential parts used for various industrial, commercial, and agricultural applications. These facilities focus on fabricating steel or metal panels, trusses, columns, beams, and roof sections that can be engineered for speed of assembly and structural efficiency. Typical business activities involve cutting, welding, bending, and assembling these metal components within factory settings before shipping them to construction sites for final integration. Operators range from small, single-plant suppliers catering to local contractors to large national enterprises managing nationwide distribution networks. Many companies also engage in offering value-added services such as site supervision or design consultation alongside their core manufacturing. The scale of operations varies significantly, with some entities concentrating solely on specific structural elements like pre-engineered trusses, while others provide complete building solutions including flooring and wall assemblies. These businesses play a critical role in modernizing the built environment by reducing on-site labor time and enhancing weather protection for buildings. The industry supports diverse markets, including warehousing, logistics hubs, and specialized industrial storage where durability and rapid deployment are paramount considerations for business success. |
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Classification References
- 01Making manufactured homes (i.e., mobile homes) and prefabricated wood buildings--are classified in Industry 32199, All Other Wood Product Manufacturing;
- 02Constructing prefabricated buildings on site--are classified in Subsector 236, Construction of Buildings; and
- 03Manufacturing metal windows and doors--are classified in U.S. Industry 332321, Metal Window and Door Manufacturing.
Index Items
Buildings, prefabricated metal, manufacturing
Carports, prefabricated metal, manufacturing
Dwellings, prefabricated metal, manufacturing
Farm buildings, prefabricated metal, manufacturing
Garages, prefabricated metal, manufacturing
Greenhouses, prefabricated metal, manufacturing
Houses, prefabricated metal, manufacturing
Panels, prefabricated metal building, manufacturing
Portable buildings, prefabricated metal, manufacturing
Prefabricated buildings, metal, manufacturing
Prefabricated homes, metal, manufacturing
Sections for prefabricated metal buildings manufacturing
Sheds (e.g., garden, storage, utility), prefabricated metal, manufacturing
Silos, prefabricated metal, manufacturing
Utility buildings, prefabricated metal, manufacturing
Warehouses, prefabricated metal, manufacturing
How Item Can Help
Item.com's Warehouse Management System tracks complex inventory of large metal panels and structural components, ensuring real-time visibility into stock levels and reducing errors in high-volume manufacturing environments.
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This tool analyzes production data to identify bottlenecks in component fabrication, allowing manufacturers to optimize assembly lines and predict material requirements for upcoming seasonal construction peaks.
Item.com Tools
External Resources
Census.gov NAICS Detail
Official US Census Bureau definition and scope for NAICS 332311.
National Association of Metal Building Builders
A major trade association representing the prefabricated metal building industry with resources for manufacturers and specifiers.
NAICS Code Guide 332311
The official NAICS classification guide defining the scope, data categories, and industry characteristics for this specific manufacturing sector.
Metal Building Council
A global industry association dedicated to metal building construction, offering standards, technical resources, and market data.
