324121 — Asphalt Paving Mixture and Block Manufacturing
NAICS 324121 is 'Asphalt Paving Mixture and Block Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 500 employees.
Description
This U.S. industry comprises establishments primarily engaged in manufacturing asphalt and tar paving mixtures and blocks from purchased asphaltic materials.
Exclusions & Cross-References
- Establishments primarily engaged in refining crude petroleum and manufacturing asphalt and tar paving mixtures
- and blocks are classified in Industry 324110, Petroleum Refineries.
- MANUFACTURING 189
Overview Facts
| NAICS Code | 324121 |
|---|---|
| Industry Title | Asphalt Paving Mixture and Block Manufacturing |
| SBA Size Standard | 500 employees |
| IRS PBA Code | 324120 (rolled-up match) |
| Sectors Hierarchy | Sector 31-33 → 324 → 3241 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
NAICS Structure: 324121
National Industry
Sector (2)
31-33
Manufacturing
Subsector (3)
324
Petroleum and Coal Products Manufacturing
Industry Group (4)
3241
Petroleum and Coal Products Manufacturing
Industry (5)
32412
Asphalt Paving, Roofing, and Saturated Materials Manufacturing
National Industry (6)
324121
Asphalt Paving Mixture and Block Manufacturing
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 2951 - Asphalt Paving Mixtures and Blocks (via SIC1987:2951→NAICS1997:324121→2002:324121→2007:324121→2012:324121→2017:324121→2022:324121)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 324121:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- 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.
Related Industries in 3241
Frequently Asked Questions (FAQ)
Is 324121 a valid 2022 NAICS code?
NAICS 324121 is 'Asphalt Paving Mixture and Block Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 500 employees.
What is the SBA size standard for NAICS 324121?
The SBA small business size standard for NAICS 324121 is 500 employees (based on employees).
What is the legacy SIC code mapping for 324121?
NAICS code 324121 maps to the legacy 1987 SIC codes: 2951 - Asphalt Paving Mixtures and Blocks.