How much strength does extruded structural steel used for beams lose at 1100 degrees?

At temperatures around 1100 degrees Fahrenheit, extruded structural steel begins to experience significant loss of strength due to the elevated temperatures affecting its mechanical properties. At this temperature, structural steel can lose about 50% of its original yield strength, which is critical to its performance in building construction.

Steel is known for maintaining its strength at room temperature, but as temperatures rise, the atomic structure of the steel starts to change, resulting in decreased strength. The loss of strength is particularly important in fire safety considerations, as it directly impacts the integrity of structural elements in a building during a fire event. Understanding this loss is essential when addressing design and safety protocols in structures to ensure they can withstand extreme conditions.

This knowledge is foundational for professionals involved in building construction and fire safety, as it informs decisions about materials and design strategies to enhance resilience against fire.