Which term refers to fires in a single building that pose an external fire hazard to neighboring structures via heat, convection, or embers?

• A. Tenability
• B. Fire Loads
• C. Exposure Fires
• D. Structural Collapse

Answer: (C)

Exposure fires describe fires in one building that create an external fire hazard for nearby structures through radiant heat, convection, or embers carried by wind. This concept matters because even if adjacent buildings aren’t on fire, sufficient heat or flying embers can ignite them, melt materials, or start spot fires, driving the need for protective measures and defensive tactics to protect exposures. Tenability, by contrast, concerns conditions inside the burning building for occupants rather than external hazards. Fire loads quantify how much combustible material is present inside a building, affecting fire growth but not the external risk to neighbors. Structural collapse is about the potential failure of the building’s structure under fire, not specifically the external exposure risk.