At what temperature do steel beams typically begin to expand significantly?

Steel beams begin to expand significantly at approximately 1,000°F. When steel reaches this temperature, it experiences thermal expansion, whereby the atoms within the steel gain kinetic energy and move further apart. This expansion can lead to structural changes and potentially compromise the integrity of the building materials.

At temperatures around 1,000°F, not only does the steel expand, but it also begins to lose some of its strength, which can affect the load-bearing capacity of beams and other structural elements. This is particularly crucial in fire safety scenarios, where the integrity of structural steel can determine the safety and survival of the overall structure.

Understanding the thermal properties of steel is essential in planning for fire safety and structural integrity, especially in environments where high temperatures might be encountered.