Steel erection and structural welding are high-hazard trades, so GCs often ask for safety history and qualifications up front.
General liability and workers’ compensation at the limits your contract or owner requires, plus auto liability when the sub drives to site. Many GCs also ask for additional insured, waiver of subrogation, and primary & non-contributory endorsements.
A written safety program (fall protection, cranes and rigging), and OSHA training records.
An experience modification rate letter from the sub’s insurance agent or carrier, commonly requested on commercial and public work.
Welder certifications where the project specification requires them, collected as an extra document.
For 1099 reporting before the first payment.
Often requested for larger or commercial jobs, or before a first job with a new sub.
On public or bonded jobs, a bonding capacity letter and performance and payment bonds may be required, as the contract specifies.
Requirements vary by state, locality, owner and contract. This is a general starting point, not legal or insurance advice. Your contract and local rules decide what’s actually required.
SubSignoff records what documents say and whether they meet the requirements you set. It doesn’t confirm coverage with insurers or verify licenses with the state. Check licenses with the issuing agency; for some states SubSignoff links to the official lookup page.