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

2.9.3.5 The emergency lighting shall be connected to an emergency
power supply capable of maintaining the minimum
illumination level for at least 2 hours.
2.9.3.6 Fire resistant cables of minimum 2-hour rating shall be used.
2.9.4 FIRE PROTECTION
2.9.4.1 Underground or enclosed trainways shall be provided with dry
mains. The dry main system and its associated water supply,
control and testing requirements shall be installed in
accordance with SS 574, except as herein modified:
(a) Dry main system shall be provided in accordance with
Diagram 2.9.4.1(a) for the following areas:
i) Each underground trainway located between two
stations;
ii) Each underground or enclosed trainway between a
station and the trainway portal; and
iii) Each underground or enclosed reception or test
track.
(b) For over-run trainway, the dry main system can be
served with only one breeching inlet at the station end.
(c) The nominal bore of the dry main shall not be less than
150mm.
(d) The dry mains in the trainways need not be fire-rated.
(e) Landing valves shall be located at not less than 2m and
not more than 3m from exit staircases and cross
passageways and shall be spaced at intervals not
exceeding 60m along the trainway.
(f) The first landing valve of the dry main after the
breeching inlet shall be located not exceeding 3m from
the interface of the station box and the trainway. For the
case of Cl.2.9.4.1(a)(ii), the first landing valve after the
breeching inlet shall be located not more than 3m from
the portal.
(g) Where gaskets are used in pipe joints for dry mains
serving different trainways but located in common TV
vent shaft and TVF fan room, the gaskets shall be
suitable for use in an ambient atmosphere of 250C.
Fire Protection
Standard for Fire Safety in Rapid Transit Systems 140