If lightweight construction such as trusses or engineered I beams are discovered, what should you do?

When lightweight construction materials like trusses or engineered I-beams are identified during firefighting operations, it is crucial to recognize the inherent risks associated with these materials. These types of construction can fail suddenly and at lower temperatures compared to traditional heavy timber or steel. This means that if a fire is present, the structural integrity of the building can be compromised more quickly, posing significant hazards to firefighters, especially those operating on the roof.

Notifying the Incident Commander (IC) and evacuating the roof is essential in ensuring the safety of personnel. The IC is responsible for making informed decisions regarding operational tactics, and awareness of lightweight construction allows for a reassessment of the fire strategy. When firefighters are on the roof, they are in a particularly vulnerable position, and evacuation decreases the risk of injury or fatalities should a collapse occur. By taking proactive precautions, the safety of all personnel can be maintained in a situation where the building's structural integrity is in question.