What Is the Code for Metal Stairs?

Published On: July 15, 2025By
Look, I’m not your inspector. I’m the guy who builds stairs that pass inspection — the first time, every time. And if you’ve ever tried to sort through stair code requirements online, you know it’s about as fun as stepping barefoot on a LEGO made of legal jargon.So, let me break it down for you — the real-world version of the code for metal stairs, based on what matters in Utah and what I’ve seen in the field.

📚 First Things First: What Code Are We Talking About?

There are two main sets of stair codes you’ll hear tossed around:

  • IRC (International Residential Code) — applies to most homes
  • IBC (International Building Code) — used for commercial, industrial, and public spaces

Utah follows the 2021 IRC and 2021 IBC, with a few state amendments. So if you’re in Springville, Provo, or anywhere else in Utah County, this info is accurate.

Source: Utah Uniform Building Standards Act — verified at building.utah.gov

🧱 The Basics – Metal or Not, These Numbers Matter

▶️ Tread Depth

  • Minimum: 10″ (IRC)
  • Commercial: 11″ (IBC)

▶️ Rise Height

  • IRC: 7 ¾” max
  • IBC: 7″ max

▶️ Stair Width

  • IRC: 36″ minimum
  • IBC: 44″ minimum (if serving over 50 occupants)

▶️ Headroom

Minimum: 6’ 8” — measured vertically from tread nosing

▶️ Handrails

  • Height: 34″–38″ above tread nosing
  • Must be continuous and graspable

(No, 2x4s don’t count.)

▶️ Landings

Required at top and bottom of stairs. Must be at least as wide as the stair and 36″ deep.

🔧 What About Metal-Specific Code?

The building code doesn’t care what material you use. What matters is:

  • The structure holds load
  • The dimensions are consistent
  • It meets fire, egress, and safety code

I build using mild steel, MIG welded — and it passes every time when it’s done right.

🧠 Common Ways People Fail Stair Code in Utah

  • Inconsistent rise/run (¼” variation max)
  • Wrong handrail height or guardrail gaps
  • Missing landings or head clearance
  • Wobbly welds or thin tread material

🛠️ Bottom Line

You don’t need to memorize the codebook. You just need a fabricator who’s read it, lived it, and builds to it.

If you want to avoid failed inspections, stop wasting time guessing. Let’s build it right from the start.

📞 Let’s Build It Right the First Time

Call Jason at 385-301-6038
or request a quote online →

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