If a building is 60 feet tall, what is the typical minimum collapse zone distance from the hazard?

If a building is 60 feet tall, what is the typical minimum collapse zone distance from the hazard?

• A. 60 feet.
• B. 30 feet.
• C. 120 feet.
• D. 60 meters.

Answer: (A)

Collapse zones protect responders by defining a safe distance where debris from a collapse could travel. A practical rule of thumb is that the minimum collapse zone distance is roughly equal to the building’s height. So for a building that is 60 feet tall, the typical minimum collapse zone is about 60 feet from the hazard. This provides a conservative buffer to reduce the chance of being struck by falling materials during collapse. Keep in mind this is a minimum distance; certain situations—heavy construction, potential for progressive collapse, wind, or uneven terrain—can require a larger zone. The other options don’t fit because 30 feet is too short for a 60-foot structure, 120 feet is more than the usual minimum, and 60 meters uses the wrong unit for this scenario.

Collapse zones protect responders by defining a safe distance where debris from a collapse could travel. A practical rule of thumb is that the minimum collapse zone distance is roughly equal to the building’s height. So for a building that is 60 feet tall, the typical minimum collapse zone is about 60 feet from the hazard. This provides a conservative buffer to reduce the chance of being struck by falling materials during collapse.

Keep in mind this is a minimum distance; certain situations—heavy construction, potential for progressive collapse, wind, or uneven terrain—can require a larger zone. The other options don’t fit because 30 feet is too short for a 60-foot structure, 120 feet is more than the usual minimum, and 60 meters uses the wrong unit for this scenario.