What is the recommended collapse zone of the end wall of a bowstring truss building?

The recommended collapse zone for the end wall of a bowstring truss building is typically established at twice the height of the wall. This guideline is grounded in understanding the potential for structural failure in these types of buildings. Bowstring trusses, characterized by their arched design, can create significant hazards when they fail, often resulting in the truss and other structural components coming down in a larger debris field than one might expect.

By setting the collapse zone at twice the height of the wall, firefighters and incident commanders can create a safer operational area that accounts for both vertical and horizontal potential movement of falling debris. This guideline helps ensure that personnel are kept at a safe distance, minimizing the risk of injury during a collapse event.

Adhering to this standard allows for better planning during firefighting operations and reinforces the importance of staying vigilant when working around structures that exhibit known weaknesses, such as bowstring truss designs.