Collapse zone around URM buildings should be applied in which directions?

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Multiple Choice

Collapse zone around URM buildings should be applied in which directions?

Explanation:
URM (unreinforced masonry) buildings are prone to brittle, unpredictable failures where debris can be expelled in any direction as the structure collapses. Because there isn’t a guaranteed single direction of collapse, the safe perimeter must surround the entire building. Applying the collapse zone all the way around ensures that pedestrians, adjacent structures, and nearby infrastructure are protected no matter which wall or section fails. Limiting the zone to the front, rear, or sides would leave other directions unprotected and could still allow dangerous debris to reach those areas.

URM (unreinforced masonry) buildings are prone to brittle, unpredictable failures where debris can be expelled in any direction as the structure collapses. Because there isn’t a guaranteed single direction of collapse, the safe perimeter must surround the entire building. Applying the collapse zone all the way around ensures that pedestrians, adjacent structures, and nearby infrastructure are protected no matter which wall or section fails. Limiting the zone to the front, rear, or sides would leave other directions unprotected and could still allow dangerous debris to reach those areas.

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