A staircase is not an element of structure as defined by part B, fire resistance would only be required if the stairs were part of a protected route for means of escape and the WC was entered from a room outside the protected stairway.12.5mm for 30mins fire protection.
It's not always about what is required, but what is right.A staircase is not an element of structure as defined by part B, fire resistance would only be required if the stairs were part of a protected route for means of escape and the WC was entered from a room outside the protected stairway.
There's a reason why it does not require fire resistance in this situation, its a pointless exercise fire protecting the soffit of a combustible stair.It's not always about what is required, but what is right.
9.5mm or 12.5 min?
Normally it's to stop the stair combusting before you've had chance to use it.There's a reason why it does not require fire resistance in this situation, its a pointless exercise fire protecting the soffit of a combustible stair.
Don't shop in b&q, they seem to be very expensive, or at least they were when I went there sometimes years ago.9.5 is not hard to find. B&q sell 1800x900 handiboards.
its lighter, easier to shape and handle , particularly in an enclosed environment and overhead.
i’d use 12.5 as theyre more rigid and i’d be more likely to have some left over from a job.
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