What is the additional average collapse time for legacy constructions compared to lightweight structural elements?

Legacy constructions, often built with traditional materials like heavy timber or masonry, have characteristics that differ significantly from modern lightweight structures, which are typically made with engineered materials such as metal trusses or advanced composite products. One notable aspect is the thermal performance of these materials during a fire.

The additional average collapse time of 14 minutes for legacy constructions compared to lightweight structural elements is rooted in the inherent resilience and mass of the legacy materials. They tend to absorb and distribute heat more evenly, allowing them to retain structural integrity for longer periods even under fire conditions. This added time can provide critical opportunities for firefighting operations and evacuation, emphasizing the importance of understanding the distinctions between these construction types when developing safety protocols and emergency response strategies.

Highlighting this difference is crucial for fire service personnel, as it informs tactical decisions in terms of resource allocation, timing, and risk assessment during firefighting operations in suburban environments where these construction types might be prevalent.