How Fire-Resistant Are Pre-Engineered Metal Buildings?
Fire resistance is a top concern for many commercial, industrial, and agricultural developers in Utah. Whether you're building in wildfire-prone areas or just want peace of mind, understanding how pre-engineered metal buildings (PEMBs) perform under fire exposure is critical.
While no structure is completely fireproof, PEMBs do offer key fire-resistant qualities — and with the right design choices, they can meet even the most demanding code requirements.
Here’s what Utah builders need to know.
Steel Framing: Naturally Fire-Resistant
The primary structural material in PEMBs — steel — is non-combustible. That means it won’t ignite or contribute to a fire’s spread like wood framing would.
Key advantages:
Steel does not burn or emit toxic smoke
Won’t fuel the fire like traditional materials
Maintains structural integrity longer under heat
This makes PEMBs a strong starting point for fire-safe design, especially for commercial and industrial uses.
Important Distinction: Fire-Resistant ≠ Fireproof
It’s important to understand that while steel doesn’t burn, it does lose strength at high temperatures. Prolonged exposure to heat can compromise structural integrity — even in a metal-framed building.
That’s why:
Fire protection often includes insulation, coatings, or barriers
Code compliance typically requires rated assemblies, especially in urban or high-risk zones
A PEMB’s fire resistance depends on the entire assembly — not just the steel.
Building Codes and Fire Ratings in Utah
In Utah, local jurisdictions follow the International Building Code (IBC), which outlines fire-resistance ratings based on occupancy, location, and proximity to other structures.
Common requirements include:
1-hour or 2-hour fire-rated walls for shared property lines or large occupancies
Sprinkler systems for buildings over certain size thresholds or with hazardous contents
Fire-resistant insulation and sheathing for walls and roof assemblies
At A.D. Constructors, we help clients navigate these requirements early in the design phase to avoid costly revisions later.
How to Enhance Fire Resistance in a PEMB
There are several strategies to increase the fire resistance of your pre-engineered metal building:
1. Fire-Rated Wall Systems
Insulated metal panels (IMPs) with mineral wool cores can offer up to 2-hour fire ratings, ideal for partitions or exterior walls near property lines.
2. Intumescent Coatings on Steel
These special coatings expand under heat to insulate the steel frame, helping maintain structural stability in a fire event.
3. Fire-Resistant Interior Finishes
Drywall layers, ceiling assemblies, and even floor systems can be designed for fire-rated performance depending on the building’s use.
4. Sprinkler Systems
Incorporating fire suppression systems isn’t just about code — it can also reduce insurance premiums and improve safety.
5. Clear Access and Fire Lanes
For agricultural or industrial facilities in rural Utah, site layout plays a role. We help ensure emergency vehicle access and fire breaks are integrated into the site plan.
Applications Where Fire Resistance Matters Most
PEMBs are used across a wide range of industries, but fire resistance is particularly important for:
Manufacturing or processing plants
Equipment storage with flammable materials
Warehouses handling high-value goods
Barns or ag facilities in wildfire zones
Cannabis grow operations or labs
Whether your project is in Box Elder County or downtown Salt Lake City, code enforcement and insurance providers will look closely at your fire protection approach.
Conclusion: Build Smart, Build Safe
Pre-engineered metal buildings offer a naturally fire-resistant foundation — but fire protection isn’t one-size-fits-all. The final performance depends on how your PEMB is designed, insulated, and finished.
At A.D. Constructors, we help Utah developers build with fire resistance in mind — meeting code, reducing risk, and protecting your investment.
Let’s talk about your project’s fire protection needs →