Collapse Zone is defined as what?

• A. Area beneath a wall in which the wall is likely to land if it loses structural integrity
• B. The top of the building
• C. The area adjacent to the door
• D. The interior basement

Answer: (A)

Collapse zone is the area on the ground directly beneath a wall or structure that is likely to be struck by debris if the structural support fails. This zone is identified because, when a wall or roof collapses, pieces can fall straight down and also outward, creating a danger area crews must avoid. That makes the description of this zone as the area beneath a wall that could land if it loses its integrity the best fit. It’s not about the top of the building, a spot near a door, or an interior basement—the collapse zone specifically defines where falling debris is most likely to land so responders can stay clear.