SIC 1791 — Structural Steel Erection
Description & Classification
SIC code 1791 representing 'Structural Steel Erection' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 238190 - Other Foundation, Structure, and Building Exterior Contractors (via SIC1987:1791→NAICS1997:23591→2002:238190→2007:238190→2012:238190→2017:238190→2022:238190)
- NAICS 238310 - Drywall and Insulation Contractors (via SIC1987:1791→NAICS1997:23591→2002:238190→2007:238190→2012:238310→2017:238310→2022:238310)
- NAICS 238120 - Structural Steel and Precast Concrete Contractors (via SIC1987:1791→NAICS1997:23591→2002:238120→2007:238120→2012:238120→2017:238120→2022:238120)
- NAICS 238220 - Plumbing, Heating, and Air-Conditioning Contractors (via SIC1987:1791→NAICS1997:23591→2002:238220→2007:238220→2012:238220→2017:238220→2022:238220)
Classification Details
| SIC Code | 1791 |
|---|---|
| Industry Title | Structural Steel Erection |
| Division | Division C: Construction |
| Major Group | Major Group 17: Construction - Special Trade Contractors |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 1791:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 17 Hub — View other legacy industries in this business division.
Related Industries in Major Group 17
Frequently Asked Questions (FAQ)
What industry does SIC code 1791 represent?
SIC 1791 is 'Structural Steel Erection', a 4-digit Standard Industrial Classification (SIC) code under Major Group 17: Construction - Special Trade Contractors (Division C: Construction); it maps to modern 2022 NAICS code(s): 238190 (Other Foundation, Structure, and Building Exterior Contractors), 238310 (Drywall and Insulation Contractors).
What is the modern 2022 NAICS mapping for SIC 1791?
SIC code 1791 maps to modern NAICS codes: 238190 - Other Foundation, Structure, and Building Exterior Contractors, 238310 - Drywall and Insulation Contractors, 238120 - Structural Steel and Precast Concrete Contractors, 238220 - Plumbing, Heating, and Air-Conditioning Contractors.