The collapse zone is established adjacent to which feature?

• A. Exposed Exterior Walls
• B. Interior Stairways
• C. Roof Access
• D. Basement Openings

Answer: (A)

The collapse zone is the area where debris from a structural failure is expected to fall, so it must be kept clear of personnel. It’s established adjacent to exposed exterior walls because those walls are the parts most likely to fail outward, projecting debris away from the interior. Placing the zone just outside these walls protects responders from debris that can spread outward when the structure collapses. Interior stairways, roof access, and basement openings aren’t the standard points of outward collapse, so they aren’t the typical collapse zone boundary.