Minimum stair width has nothing to do with Part B Part B widths relate
to the numbers of occupants having to escape from an area and is made up
often of several staircases rather than 1. 100 people need xmm space to
evacuate in.
The width relates to, please tell me if I'm wrong, the acceptable space
required for a variety of users to easily use the stairs, i.e. person
with a guide dog, etc, up and down.
In terms of evacuation research was completed into how much space would
be required to do a carry down, carrying someone in their own chair;
which exceeds 1000mm clear, whether a 3 or 4 person carry down. This
width needs to be agreed with a fire evacuation strategy for the whole
building.
Regards Jane
Jane Simpson BA Grad Dip Arch RIBA
Regional Manager
For and on behalf of
Aedas Access Consultancy
Norwich Union House
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Huddersfield
HD1 2LF
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-----Original Message-----
From: Accessibuilt list [mailto:[log in to unmask]] On Behalf
Of Hunt, Alan
Sent: 08 June 2006 16:00
To: [log in to unmask]
Subject: Re: Explanation Required
Hi John
Could it have anything to do with Part B Fire Safety and the minimum
escape stair width??
Additionally, I've never really understood the requirement to provide a
central handrail to stairways wider than 1.8m when the minimum clear
width has to be 1m. (1.8 divided by 2 = 900mm) I'm probably overlooking
something blatantly obvious here so if anyone can open my eyes I'd be
grateful.
Regards
Alan Hunt
-----Original Message-----
From: Accessibuilt list [mailto:[log in to unmask]] On Behalf
Of John Gregory
Sent: 08 June 2006 15:39
To: [log in to unmask]
Subject: Explanation Required
Hi All,
Could someone indicate why there needs to be a minimum 1m clear width
between handrails on stairs? Both AD M and BS 8300 quote this figure,
but give no reason for requiring such a figure. The only explanation
given is for having handrails on both sides - which is reasonable and
easily argued when dealing with designers. What is more difficult is to
argue for a 1000mm width between handrails when niether of these
documents give an explanation..
If anyone has a solid explanation for this which I could use to persuade
a designer, could they please let me know?
Regards.
John.
John Gregory
Access Officer
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