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

(a) If two exits or exit access doors are required, they
shall be placed at a distance from one another
equal to or not less than half the length of the
maximum overall diagonal dimension of the
compartment or area to be served, measured in a
straight line between the furthest edges of the exit
doors or exit access doors (see Diagram
2.2.5.16(a)(i) to (a)(v)). If the distance between the
2 exits is less than half the length of the maximum
overall diagonal dimension of the compartment or
area to be served, it shall be considered as a oneway
escape arrangement.
(b) In rooms or compartments protected throughout by
an approved automatic sprinkler system which
complies with the requirements of Section 2.5, the
minimum separation distance between two exits or
exit access doors measured in accordance with
Cl. 2.2.5.16(a) shall be not less than one third the
length of the maximum overall diagonal dimension
of the compartment or area to be served.
(c) Where exits are inter-connected by a corridor, exit
separation shall be permitted to be measured along
the line of travel within the exit access corridor.
The exit access corridor connecting the exits shall
be protected by minimum 1-hour fire rated
enclosures. Doors opening into this corridor shall
have minimum ½-hour fire resistance rating (see
Diagram 2.2.5.16(c)).
2.2.5.17 Exits shall be provided with artificial lighting facilities to
the satisfaction of the requirements in Section 2.7.
2.2.5.18 The location of every exit on every floor shall be clearly
indicated by exit sign and directional signs to comply with
the requirements in Section 2.7.
Exit lighting
Exit and
directional sign
Standard for Fire Safety in Rapid Transit Systems 39