Which term describes a fire that spreads to neighboring structures?

• A. Fire Load
• B. Exposure Fire
• C. Fire Behavior
• D. Life Safety

Answer: (B)

The main idea here is how a fire affects structures beyond the one that’s burning. When a fire can spread to neighboring buildings, the term used is exposure fire. It describes the risk to adjacent properties from heat, flames, or embers reaching those buildings and potentially igniting them, even if the other structure isn’t directly involved in the initial fire.

This is different from fire load, which is about how much fuel exists inside the burning building; fire behavior, which covers how a fire grows and moves within a structure; and life safety, which focuses on protecting occupants. Exposure looks at the broader impact on nearby buildings and how design choices—like adequate clearances, exterior fire resistance, and ways to block radiant heat—reduce that risk.