Standard for Fire Safety in Rapid Transit Systems - Singapore Civil ...

(e) No part along the direction of escape shall be less
than the minimum required width for the stairs and
landings.
(f) Handrails
(i) Every exit staircase shall have handrails on both
sides, except that staircases that are 1250mm or
less in width may have a handrail on one side
only, and
Exception: Handrails are not required for any
staircase having not more than 5 risers.
(ii) Where staircases exceed 2000mm in width,
handrails shall be used to divide the staircase
into sections of not less than 1000mm of width
or more than 2000mm of width, and
(iii) Handrail ends shall be returned to the wall or
floor or shall terminate at newel posts, and
(iv) Handrails that are not continuous between
flights shall extend horizontally, at the required
height, at least 300mm beyond the top riser and
continue to slope for a depth of one tread
beyond the bottom riser.
(g) Where fire-separated exit staircases are provided,
(i) There shall be no enclosed useable space within
the exit enclosure, including under stairs, and
(ii) The exit enclosure shall not be used for any
purpose that has the potential to interfere with
egress.
(h) Staircases shall be provided with a sign not smaller
than 300mm x 300mm within the stairwell at each
storey landing. The sign shall contain the following
information in the order as follows:
(i) The storey number, at least 125mm in height
(ii) An identification of the staircase in alphabet
and/or number, at least 25mm in height.
Handrails
No useable
space in exit
enclosure
Stair
identification
sign
Standard for Fire Safety in Rapid Transit Systems 29