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

300 mm
(iii) The sign shall be located such that it is visible
when the door is in the open position and also
visible to any person moving up or down the
staircase.
(iv) The letters and numbers on the sign may be of
any colour that shall contrast with the
background colour.
300 mm
(i) All exit staircases shall be ventilated by fixed
openings in the external walls, such openings being
of area not less than 10 per cent of the floor area per
floor of the staircase, or mechanically ventilated to
comply with the requirements in Section 2.6. Exit
staircase and occupancy area shall not share the same
airwell or void for lighting and ventilation.
(j) In any station of which the habitable height exceeds
24m, any internal exit staircases without provision for
natural ventilation shall be pressurised to comply with
the requirements in Section 2.6. In a station comprising
more than four basement storeys, the exit staircase
connecting to the fire-fighting lobby shall be
pressurised.
2.2.5.7 SCISSORS EXIT STAIRCASE
(a) Where two separate internal exit staircases are
contained within the same enclosure, each exit
staircase shall be separated from the other by
non-combustible construction having fire resistance
for a minimum period equal to that required for the
enclosure, and
(b) Such scissors exit staircases shall comply with all
applicable provisions for exit staircase under
Cl. 2.2.5.6.
25 mm
1 THRU 4 1 THRU B2
2 B1
STAIRCASE A
STAIRCASE B
Ventilation
Pressurisation
Scissors exit
staircase
Standard for Fire Safety in Rapid Transit Systems 30
125 mm