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Discounting an exit width when escape stairs have protected lobbies

Guest Celine Hynes

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Guest Celine Hynes

Hi could you clarify something please. BS9999 16.6.1 says you should discount a storey exit when calculating available exit width (if there is more than one storey exit). However, 17.3.2 says if your escape stairs have protected lobbies you don't need to discount a stair. If escape exits are at the bottom of the stairwells, and the stairwells have protected lobbies, can we avoid discounting one of the exit widths?

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