238120 — Structural Steel and Precast Concrete Contractors
Description
This industry comprises establishments primarily engaged in (1) erecting and assembling structural parts made from steel or precast concrete (e.g., steel beams, structural steel components, and similar products of precast concrete) and/or (2) assembling and installing other steel construction products (e.g., steel rods, bars, rebar, mesh, and cages) to reinforce poured-in-place concrete. The work performed may include new work, additions, alterations, maintenance, and repairs (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Concrete product (e.g., structural precast, structural prestressed) installation
- Rebar contractors
- Erecting structural steel
- Reinforcing steel contractors
- Placing and tying reinforcing rod at a construction site
- Structural steel contractors
- Precast concrete panel, slab, or form installation
Exclusions & Cross-References
- Pouring concrete at the construction site for building foundations or structural elements--are classified in
- Industry 238110, Poured Concrete Foundation and Structure Contractors; and
- Masonry work--are classified in Industry 238140, Masonry Contractors.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 1791 - Structural Steel Erection (via SIC1987:1791→NAICS1997:23591→2002:238120→2007:238120→2012:238120→2017:238120→2022:238120)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 1935 — Barges and Lighters, Special Purpose
- PSC L095 — Technical Representation Services: Metal Bars, Sheets, and Shapes
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 238120 valid in 2022? ▾
Yes, 238120 is a valid 6-digit 2022 NAICS national industry code representing 'Structural Steel and Precast Concrete Contractors' under Sector 23 in the official classification index.
What is the SBA size standard for NAICS code 238120? ▾
The Small Business Administration (SBA) has established a small business size standard of $19,000,000 for NAICS code 238120 (Structural Steel and Precast Concrete Contractors), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 238120? ▾
According to official Census Bureau concordance tables, NAICS code 238120 (Structural Steel and Precast Concrete Contractors) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 1791 - Structural Steel Erection.
Related Pages & Tools
Further regulatory reference links for NAICS code 238120:
- Sector 23 Directory Hub — List of related industries in the Construction sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 238120 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Structural Steel and Precast Concrete Contractors).
- IRS PBA Code for Ironwork — Principal Business Activity tax reporting details.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.