Please ensure Javascript is enabled for purposes of website accessibility

5 Questions to Ask Before You Choose a Steel Building Manufacturer

A steel building is one of the larger purchases you’ll make for your operation, and most people only do it once or twice. That puts you at a disadvantage: the person across the table has done it a thousand times.

The good news is you don’t need to become an expert. You need five questions.

Ask these of every company you’re considering, including us. The answers will tell you more than any brochure.

1. Are you the manufacturer, or a dealer?

Start here, because it changes everything downstream.

A lot of companies that sell steel buildings don’t make them. They’re brokers or dealers who take your order, mark it up, and pass it to a fabricator you’ll never speak to. That’s not automatically bad, but you should know which one you’re dealing with, because it affects price, lead time, and who answers the phone when something needs fixing.

How to actually verify it:

  • Ask where the building will be fabricated, and get a city and state.
  • Ask if you can visit the plant. A real manufacturer will say yes.
  • Ask who you’ll talk to if there’s a problem in week six: the salesperson, or someone on the floor?

If the answers get vague, you’re likely talking to a middleman. Again, not a dealbreaker, but you should be pricing that markup into your comparison.

2. Are you IAS AC472 accredited? Are you an MBMA member?

Steel coils at Ostro Steel Structures manufacturing plant Louisville Georgia

These sound like alphabet soup. They’re the two credentials that actually mean something.

IAS AC472 is an accreditation from the International Accreditation Service. To hold it, a manufacturer submits to independent audits twice a year covering how buildings are designed, fabricated, and documented. It isn’t a logo you buy. Fewer than 200 manufacturers in the United States carry it.

MBMA (Metal Building Manufacturers Association) membership signals the company operates to industry standards for design and construction.

Why it matters practically: many architects and engineers require AC472 on the spec. If your manufacturer doesn’t have it, your project can stall at plan review — or you can end up re-bidding the whole thing.

Ask for the certificate. Any accredited manufacturer will hand it over without hesitating.

3. Who does the engineering, and will the drawings be stamped for my state?

Every steel building has to be engineered for the loads where it’s actually going to stand: snow in one state, wind and seismic in another. Codes differ, and they change.

What to ask:

  • Is engineering done in-house, or farmed out to a third party?
  • Will I get drawings stamped by an engineer licensed in my state?
  • Who handles it if the local building department comes back with questions?

In-house engineering usually means faster turnarounds and fewer games of telephone when a permit reviewer wants a change. Outsourced engineering can work fine — but ask how long revisions take, because that’s where projects quietly lose weeks.

4. Can you trace the steel?

This is the question that separates the serious manufacturers from the rest, and almost nobody asks it.

Ask whether the structural steel in your building can be traced back to the mill it came from, the specific heat run, and the exact chemical composition. A manufacturer with real quality control can tell you. One that’s assembling parts from wherever is cheapest that month usually can’t.

While you’re there, ask about inspection: are there hold points built into fabrication, where the work stops and gets checked before it moves on? Or does everything get looked at once at the end, when finding a problem means tearing something apart?

You’re not being difficult by asking. You’re asking the same thing a good inspector would.

5. What’s in the quote and what isn’t?

The lowest number on paper is often the highest number at the end. Quotes are only comparable if they include the same things.

Go line by line:

  • Freight — is delivery included, and to your actual site?
  • Accessories — doors, windows, insulation, gutters. Included, or added later?
  • Anchor bolts, sealant, fasteners — small items that show up as change orders.
  • Engineering and permit drawings — included, or a separate charge?
  • Lead time — and is it a real estimate or a sales-team number?

Then ask the simplest question of all: what would make this price change? An honest answer tells you a lot about who you’re dealing with.

The short version

If you only remember one thing: ask who’s actually making your building. Most of the other answers follow from that one.

A manufacturer that designs, engineers, and fabricates under its own roof can answer every question above without checking with anyone. That’s not a sales pitch — it’s just how the accountability works. When the same team draws it, builds it, and ships it, there’s nobody to point at.


Ostro Steel Structures designs, engineers, and manufactures steel buildings in our own 180,000 sq ft facility just outside Augusta, Georgia, then ships directly from our factory to your jobsite. We’re IAS AC472 accredited and an MBMA member, with nearly 30 years of building behind us.

Ask us all five. We’ll answer every one.

Get a Real Quote · (844) GO-OSTRO

© Copyright 2026 - Marpen Interactive LLC