If you own or operate a welding business and need your NAICS code, here is your answer right away.
The primary NAICS code for a structural and on-site welding contractor is 238190, classified under Other Foundation, Structure, and Building Exterior Contractors in the Construction sector. However, “welding” is a highly versatile skill applied across many different industries. The right code for your business depends on whether you build structures, fix broken metal, manufacture equipment, or sell supplies. This page covers the relevant codes so you can identify the one that fits.
| Field | Details |
|---|---|
| NAICS Code | 238190 |
| Industry Title | Other Foundation, Structure, and Building Exterior Contractors |
| Sector | 23 (Construction) |
| Industry Group | 238 |
| Last Updated | 2022 NAICS Edition (Next NAICS Edition will come in 2027) |
What Does NAICS Code 238190 Cover?
According to the official 2022 NAICS data, code 238190 covers establishments primarily engaged in structural steel erection, installing metal framing, and performing specialized exterior construction work.
In simple terms, this code applies to welding businesses that build, join, or repair structural metal components on construction sites. For welding contractors, this includes:
- Structural steel welding and ironwork for commercial buildings
- Erecting metal buildings and pre-engineered structures
- Welding pipes and structural components on new construction sites
- Mobile welding services that travel to construction sites to weld structural beams, stairs, or railings
- Installing metal decks, grating, and ornamental metal work on building exteriors
The important distinction here is construction and structural assembly. This code covers joining heavy metal to create or repair the structural framework of a building or site, but it does not cover manufacturing metal products in a factory or fixing consumer equipment.
Does My Welding Business Qualify for Code 238190?
Your business qualifies for NAICS code 238190 if:
- You operate a mobile welding rig or contracting business that travels to job sites to perform structural work
- Your main source of revenue comes from erecting steel, welding structural beams, or installing metal building components
- You do on-site welding for new construction, renovations, or heavy infrastructure
Your business may not qualify if:
- You manufacture welding machines, torches, or electrodes, which falls under 333992 (Welding and Soldering Equipment Manufacturing) instead
- You fix broken metal parts, gates, trailers, or agricultural equipment, which falls under 811490 (Commercial and Industrial Machinery and Equipment Repair and Maintenance) instead
- You mass-produce metal products (like gates, frames, or tanks) in a workshop, which falls under 332 (Fabricated Metal Product Manufacturing) instead
- You sell welding gas, safety gear, and rods to other businesses, which falls under 423840 (Industrial Machinery and Equipment Merchant Wholesalers) instead
When your business sits between two codes, always classify based on whichever activity generates the most revenue.
Where Will You Need This Code?
Your NAICS code appears in more places than most contractors expect. Here is where code 238190 will be required:
- Construction Insurance. This is highly critical for welders. Insurance providers use this code to calculate your General Liability premiums. Welding carries extreme risks for fire damage, property destruction from sparks, and severe bodily injury. Being classified correctly ensures you have the right hot-work and liability coverage.
- Building Permits and Inspections. Most cities and counties require a NAICS code or contractor license number when you pull a permit for structural steel work or welding on a construction site.
- SBA Loan Applications. If you need financing to purchase a welder truck, heavy-duty welding machines, or lifting equipment, the Small Business Administration requires your NAICS code to assess your loan eligibility.
- Federal Contracting via SAM.gov. Government agencies and military bases frequently hire structural welders and ironworkers. To bid on these federal construction contracts, you must be registered on SAM.gov under the correct construction code.
- Business Bank Accounts. Many banks ask for your NAICS code when opening a business checking account to ensure your business is classified properly from day one.
238190 in the NAICS Hierarchy
Every NAICS code sits inside a structured hierarchy. Here is exactly where 238190 fits:
| Level | Code | Title |
|---|---|---|
| Sector | 23 | Construction |
| Subsector | 238 | Specialty Trade Contractors |
| Industry Group | 2381 | Foundation, Structure, and Building Exterior Contractors |
| NAICS Industry | 23819 | Other Foundation, Structure, and Building Exterior Contractors |
| National Industry | 238190 | Other Foundation, Structure, and Building Exterior Contractors |
Frequently Asked Questions
What is the NAICS code for a mobile welding business?
It depends on what you do when you arrive. If you drive to a construction site to weld structural steel or metal framing, you use 238190. If you drive to a farm to fix a broken tractor axle or to a residential home to fix a cracked metal trailer hitch, you are performing repair work, which falls under 811490.
Does code 238190 cover welding custom metal art or furniture?
No. If you are in a workshop fabricating custom metal signs, furniture, or art pieces to sell to consumers or retail stores, the government classifies you as a manufacturer. You would use a code under 332 (Fabricated Metal Product Manufacturing), such as 332999 (Miscellaneous Fabricated Metal Product Manufacturing).
What if I mass-produce metal gates and then go install them?
You would likely need two different codes depending on how you track revenue. Making the gates in your shop is 332 (Manufacturing). Installing them at the customer’s property is 238190 (Construction). For tax and insurance purposes, you must classify your business under whichever activity generates the majority of your total income. If you buy pre-made gates and only install them, you strictly use 238190.
What is the NAICS code for a welding supply store?
If your business sells welding gas, safety gear, rods, and heavy equipment, your code depends on who you sell to. If you sell primarily to other businesses (B2B), you are a wholesaler and use 423840 (Industrial Machinery and Equipment Merchant Wholesalers). If you sell primarily to walk-in hobbyists and individual consumers (B2C), you are a retailer and use 444130 (Hardware Stores) or 454110 (Electronic Shopping/Retail).