NAICS 321215

Overview

The North American Industry Classification System (NAICS) is the production-oriented standard used by U.S. Federal statistical agencies to classify business establishments for collecting, analyzing, and publishing data on the U.S. economy. NAICS was created under the Office of Management and Budget (OMB), adopted in 1997 to replace SIC, and is jointly maintained with Statistics Canada and Mexico’s INEGI; the current U.S. reference vintage is 2022. ¹

NAICS 321215 — Engineered Wood Member Manufacturing — covers establishments primarily engaged in manufacturing fabricated or laminated structural wood members, including wood arches, roof and floor trusses, I-joists, laminated veneer lumber (LVL), parallel strand lumber, and other pre-engineered or glue-laminated timber members. In NAICS 2022, 321215 consolidates former codes 321213 (Engineered Wood Member (except Truss) Manufacturing) and 321214 (Truss Manufacturing). ²

See also on G2X:

• G2X — NAICS 321215 overview
• G2X — NAICS 321113
• G2X — NAICS 321992

What this NAICS covers

• Fabricated or laminated structural wood arches for buildings and bridges. ²
• Wood roof and floor trusses manufactured from dimension lumber or engineered lumber. ²
• Engineered I-joists (wood flanges with web), including fabrication and assembly. ²
• Laminated veneer lumber (LVL) and parallel strand lumber (PSL) production. ²
• Glue-laminated and other pre-engineered structural timber members. ²
• Finger-jointed lumber used as structural components. ²

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	321113	Sawmills (solid wood structural members such as dimension lumber are classified here, not in 321215). 2
NAICS	321992	Prefabricated Wood Building Manufacturing (prefab buildings/sections; not the individual engineered members). 2
NAICS	321219	Reconstituted Wood Product Manufacturing (e.g., MDF, OSB, waferboard). 2
NAICS	321211	Hardwood Veneer and Plywood Manufacturing (distinct from engineered structural members). 2

2022 change highlights

• Code consolidation: NAICS 2022 created 321215 by combining 321213 and 321214, bringing truss manufacturing into the engineered wood member industry. ²
• Implementation: Census programs began publishing data on the 2022 NAICS basis with the 2022 Economic Census “First Look” in January 2024; full adoption across Census economic programs is planned by the end of calendar year 2027. ³

Scope notes and exclusions

• Included: Fabricated/laminated structural wood members, such as LVL, PSL, I-joists, glue-lam beams, arches, and wood trusses. ²
• Excluded: Solid-sawn structural members produced in sawmills (use 321113); prefabricated wood buildings or building sections (use 321992). ²

Frequently asked questions

• What products fall under NAICS 321215? Engineered structural wood components such as glue-laminated beams, LVL, PSL, I-joists, finger-jointed structural lumber, and wood roof/floor trusses. These are pre-engineered or laminated members intended for load-bearing applications in buildings and related structures. ²

• Did NAICS 2022 change how truss manufacturing is classified? Yes. NAICS 2022 consolidated prior codes 321213 and 321214 into 321215, so wood truss manufacturing is now included within 321215 rather than a separate code. ²

• How is 321215 different from 321113 (Sawmills)? 321113 covers solid-sawn products (dimension lumber, timbers) produced from logs or bolts. 321215 covers fabricated or laminated engineered members (e.g., LVL, I-joists, trusses), reflecting different production processes and end uses. ²

• When will all Census economic programs reflect NAICS 321215? Census began publishing on a 2022 NAICS basis with 2022 Economic Census releases in 2024 and plans full adoption across NAICS-based programs by December 2027, with limited exceptions that may follow later schedules. ³

• What is the SBA small business size standard for NAICS 321215? SBA publishes size standards by NAICS. Consult the current Table of Small Business Size Standards for the applicable threshold for 321215, as employee counts and/or receipt thresholds may be updated over time. ⁴

Useful resources

• U.S. Census Bureau: NAICS 2022 Manual — industry descriptions and cross-references. ²
• U.S. Census Bureau: NAICS main page — background, history, and tools. ¹
• U.S. Census Bureau: Implementation of the 2022 NAICS — impacts and timeline. ³
• U.S. Small Business Administration: Table of Small Business Size Standards (effective March 17, 2023). ⁴

References

1. U.S. Census Bureau — North American Industry Classification System (NAICS) main page. https://www.census.gov/naics
2. 2022 NAICS United States Manual — Subsector 321 and industry 321215 definition, cross-references, and 2017→2022 concordance. https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf
3. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 NAICS (timeline and adoption). https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
4. U.S. Small Business Administration — Table of Small Business Size Standards (effective March 17, 2023). https://www.sba.gov/sites/default/files/2023-06/Table%20of%20Size%20Standards_Effective%20March%2017%2C%202023%20%282%29.pdf