7 Designs Iron
C51ANTIOCH, CA 94509
(916) 740 5525View profileLicensed under Class C-51 (Structural Steel)
Find CSLB-licensed structural steel contractors in California. Every listing shows an active licence number you can check yourself.
Structural Steel Contractors by city
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Get matched with a licensed proStructural steel in California carries loads that wood cannot — moment frames, wide-flange beams and heavy connectors. Field welding must match shop certifications, and bolt torque matters as much as weld beads.
Residential steel is often overlooked until a large opening is needed. Ask whether the contractor provides engineering or expects stamped drawings from your architect.
Fireproofing may be required on steel in certain occupancies even in residential mixed-use. Ask early if intumescent or spray fireproofing is in the structural spec.
Class C-51 (Structural Steel) is structural steel — CSLB authorizes erection of structural steel frames and related work. Ornamental metal is Class C-23. Shop primer is not the same as finished paint, and field touch-up systems should be specified for exterior steel.
Contractors hold an active Class C-51 (Structural Steel) licence at a California address. Steel erection requires permits and special inspections through the building department with jurisdiction over your address. Erection tolerances for bolt holes are tight, and field reaming is a sign the shop drawings did not match the as-built foundation. Confirm crane reach with a site diagram because a beam on the truck that cannot lift is a costly delay.
Licence status does not prove a welder is certified for the joint type. Ask for welder qualifications on file for your project. Plumb and line tolerance on columns affects every connection above, and shims should be steel not wood at permanent bearing points.
Bolted connections in seismic zones use specific bolt grades and tensioning methods. The erector should match the structural engineer connection schedule, not generic hardware. Payment should track inspection milestones in California, not calendar dates alone, so you can verify structural steel progress before each draw. Payment should track inspection milestones in California, not calendar dates alone, so you can verify structural steel progress before each draw. Payment should track inspection milestones in California, not calendar dates alone, so you can verify structural steel progress before each draw.
Every licence number below links to its record at cslb.ca.gov, where you can confirm status and expiry yourself.
1,337 active CLEAR licences statewide · page 1 of 56
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Licence first. References second. Reviews last. Why that order.
Get matched with a licensed proErection of structural steel requires Class C-51 (Structural Steel). Decorative iron is a different classification.
The register lists 0 with an active Class C-51 (Structural Steel) licence at a California address.
Structural steel typically requires building permits and special inspection through the building department with jurisdiction over your address. The contractor should schedule inspections before concealing connections.
Crane access, shoring and connection type drive duration. A site visit is more reliable than a phone estimate.
Beam weight and site access decide. Ask for the lift plan and street closure needs before fabrication starts.