Awarding structural steel is the highest-leverage decision on your schedule, because steel gates every trade behind it. The right erector is not just the low number. It is the party most likely to stand the frame on time, safely, and without a stack of RFIs. Here is how to separate a qualified steel subcontractor from a price on a bid tab.
Why AISC certification is the baseline, not the finish line
AISC Certification tells you a contractor runs an audited quality management system, not that they are the right fit for your job. Treat it as the entry ticket. A Certified Steel Erector (CSE) has been reviewed for field erection practices, and a Certified Fabricator has been reviewed for shop production. Confirm the certification type matches the scope you are awarding, then move on to the questions that actually predict performance in the field.
The 10 questions to ask before you award
| # | Ask | What a strong answer sounds like |
|---|---|---|
| 1 | Do you self-perform erection, or sub it out? | We self-perform with our own crews |
| 2 | What AISC certification do you hold? | Certified Fabricator and Certified Steel Erector |
| 3 | Are your welders AWS D1.1 qualified? | Yes, with current WPS and qualification records |
| 4 | What is your current EMR? | At or below 1.0, with the letter to show |
| 5 | Can you show your OSHA 300 logs? | Yes, plus a written safety program |
| 6 | What is your bonding capacity? | Single and aggregate limits that cover this job |
| 7 | Can you give three comparable references? | Similar tonnage, market, and complexity |
| 8 | Who produces the shop drawings and BIM? | In-house or a tightly managed detailer |
| 9 | How do you sequence fabrication to erection? | Fabrication built around the erection plan |
| 10 | Who owns weld quality across shop and field? | One QA/QC chain, one accountable party |
Print the table, take it to the scope review, and make the sub answer each one on the record.
What “self-perform” really tells you
Question one is the most predictive. A steel subcontractor that self-performs both fabrication and erection owns the whole package: the crews, the sequence, and the quality. When a fabricator subs erection to a third party, or an erector buys steel from an outside shop, you inherit the seam between them. That seam is where fit-up disputes, sequencing misses, and finger-pointing live. A single-source steel subcontractor removes it before the job starts.
Reading the safety record: EMR and OSHA
EMR and OSHA logs are the two numbers that predict field risk. The Experience Modification Rate compares a contractor’s workers’ compensation loss history to the industry average, where 1.0 is average and lower is better. Do not stop at the number. Ask for the OSHA 300 logs and a written safety program, and read them together. A clean EMR paired with a documented OSHA program and trained crews is what you want standing steel over your other trades.
Bonding, references, and detailing capacity
Three practical checks round out the vet:
- Bonding. Confirm single-project and aggregate bonding capacity comfortably exceed your package. A bonded sub has already passed a surety’s financial review.
- References. Ask for three projects of comparable tonnage, market, and complexity. A data center, a hotel, and a mall each sequence differently, so match the reference to your work.
- Detailing and BIM. Find out who produces the shop drawings and coordinates the model. In-house or closely managed detailing shortens the approval and RFI cycle and keeps the connection design consistent through erection.
The award decision
Score every bidder on the same ten questions, not on price alone. The lowest number that answers “we sub out erection,” “we buy our steel outside,” or “we cannot show the safety record” is rarely the lowest cost once coordination and schedule risk are priced in. The bid you want is the one where a single AISC-certified team self-performs the package, carries the certifications and the safety record, and sequences the shop to the erection plan.
TMG | Tri-State Metal Group answers “one team” to question one. We fabricate and erect our own steel across SC, NC, and GA, hold AISC Certified Fabricator and Certified Steel Erector status, and staff AWS D1.1 qualified welders. Bring the ten questions to the scope review and hold every bidder to them.