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Why are the doors to stairwells kept closed in a multistoried building?

April 26, 2017building closed doors kept stairwells

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Why are the doors to stairwells kept closed in a multistoried building?

1 Answer

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Protection. The doors prevent the spread of smoke, heat and hot gasses through the stairwell, leaving them free to evacuate people safely from the building. A wedged-open door allows smoke to fill the stairwell and the building’s upper floors, putting the occupants at risk.