NAICS 238990 Government Bids for On-Call Welding, Misc. Metals & Specialty Trade Contractors
238990 is the catch-all specialty trade code. For welding and metals shops it often shows up next to 238120 and 332312 on mixed trade packages, railing and grating supply buys, and on-call repair contracts.
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What NAICS 238990 covers
The U.S. Census Bureau defines 238990, All Other Specialty Trade Contractors, as establishments primarily engaged in specialized trades except foundation, structure and building exterior contractors, building equipment contractors, building finishing contractors and site preparation contractors. It includes new work, additions, alterations, maintenance and repairs. Census examples include fence installation, scaffold erecting, crane rental with operator, sandblasting and steeplejack work (Census NAICS 2022 definition).
Open bids we matched to 238990 work
From the IronBid Pro Nov 1, 2026 bid run. These codes are IronBid's trade match, not necessarily the code the agency printed. Check the source notice before you bid.
| Agency & State | Notice | Scope | Due |
|---|---|---|---|
| City of St. Louis Supply Division, for the Water Division (MO) | 2027BID000056 Aluminum Products For Custom Platform | Supply only: aluminum guardrail (27 line items, per linear foot), aluminum grating (44 line items, per square foot) and structural channel and angle, delivered by Dec 31, 2026. | Nov 24, 2026, 1:00 PM ET (12:00 PM CT) |
| Timberlake Public Schools, Helena (OK) CM at Risk: Joe D. Hall LLC | Timberlake Elementary Addition legal notice (Enid News & Eagle, Oct 27, 2026) | Trade packages #4 Structural Steel, Steel Decking & Metal Fabrications (material), #5 Structural Steel Erection (labor) and #17 HVAC. 5% bid security; $100 deposit per plan set. | Nov 19, 2026, 6:00 PM ET (5:00 PM CT) |
More open work is on the 50-state bids directory.
238990 vs 238120 vs 332312
| Code | Title | Typical metals work |
|---|---|---|
| 238120 | Structural Steel and Precast Concrete Contractors | Field erection, bolting, field welding, decking |
| 332312 | Fabricated Structural Metal Manufacturing | Shop-fabricated beams, platforms, stairs, rails |
| 238990 | All Other Specialty Trade Contractors | On-call welding, field repair, misc. metals and mixed trade packages |
Agencies choose one code per solicitation, so a fab-and-install shop that lists only one in SAM.gov misses matches. The SAM.gov registration guide for welding shops walks through adding codes. Before bidding a federal small business set-aside, check the current size standard for the solicitation's code in the SBA size standards table.
Go / No-Go checklist for 238990 bids
- Supply or install: Railing and grating buys like the St. Louis one are often goods-only. Install-only crews should pass; fab shops and metals distributors should look.
- Who you bid to: On CM at Risk school jobs, you bid trade packages to the construction manager, not the district.
- Bid security: Check the bond or certified-check percentage and plan deposit before you spend estimating time.
- Hot work paperwork: NFPA 51B hot work permits and an AWS D1.1 WPS/PQR log are in the $49 Rig & Shop Compliance Pack.
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On-call welding, misc. metals and specialty trade bids at 7:00 AM Eastern, without the IT and janitorial noise:
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Related Trade Codes & Comparisons
NAICS 238120 Structural Steel Erection · NAICS 332312 Structural Steel Fabrication · NAICS 238220 Commercial HVAC & Boilers · NAICS 811310 Millwright & Machinery · BidRanger Shutdown Alternative · 2026 Government Welding Bids Guide