Final answer:
A collapse zone is an area designated for safety during building collapse incidents, and it should be at least 2 times the height of the structure that is anticipated to fall.
Step-by-step explanation:
A collapse zone is a specific area designated for safety during building collapse incidents. It is an area where no one, including firefighters, should enter. Most fire service texts recommend that a collapse zone be at least 2 times the height of the structure that is anticipated to fall.