What Happens to Steel Beams During Fire Damage?

Steel is strong at normal temperatures, but fire changes that. When steel heats up, it expands and loses strength. At around 1,000 degrees Fahrenheit, steel can lose about half of its load-bearing capacity. The longer the fire burns, the more the beams may sag or twist.

The heat can also cause the steel to lose its protective coating, leaving it exposed to rust later. Even if the beam looks fine from a distance, internal changes may have occurred. Only a professional with the right tools can measure the actual strength and condition after a fire.

Not every damaged beam needs to be replaced. Minor surface damage might be fixed by cleaning and recoating. If the beam has lost its shape or strength, it may need reinforcement or full replacement. The decision depends on how much the fire affected the steel and the rest of the structure.

A structural engineer or a qualified professional can assess the damage and recommend the right course. They will look at the beam's condition, the building's design, and the load it carries. Sometimes adding a steel plate or column is enough. Other times, removing and replacing the beam is the safer choice.

First, make sure the fire department has declared the building safe to enter. Do not walk on damaged floors or near sagging beams. Take photos of the damage for your records and your insurance claim. Then, contact a structural professional to inspect the beams before any repair work begins.

Your insurance company will need documentation of the fire damage. Keep all receipts for temporary repairs and living expenses if you need to stay elsewhere. Policies vary, and your insurer decides what is covered. Check your policy to understand what steps you need to take.

• Wait for the fire department's all-clear
• Take photos of all visible damage
• Keep a list of damaged items
• Contact a structural inspector
• Document any temporary repairs you make