Pòt dife refere a pòt la ki ka satisfè kondisyon ki nan estabilite rezistans dife, entegrite ak izolasyon chalè nan yon sèten peryòd tan. Pòt dife a sitiye nan divizyon dife a, eskalye evakyasyon, arbr vètikal ak lòt patisyon dife ak yon sèten rezistans dife.

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