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

2.8.4 STATIONS CONNECTED TO NON-TRANSIT
OCCUPANCIES
2.8.4.1 Where an entrance of an underground station is integrated with
a non-transit occupancy, the following shall be complied with:
(a) The entrance shall comply with the relevant fire safety
requirements in other sections of this Standard.
(b) The entrance shall be fire separated from the non-transit
occupancy with fire barriers having at least 2 hours fire
resistance.
(c) There shall be no unprotected openings at the nontransit
occupancy area within 3m of the ventilation
openings located in the external wall of the entrance.
(d) Where fire-rated shutters are installed to provide the fire
separation required in Cl.2.8.4.1(b), it shall be installed
with localised smoke detector on both sides of the fire
rated shutter. These fire-rated shutters shall be activated
by:
- the localised smoke detector/s on either side (ie. one
side) of these fire shutters,
- the adjacent building fire alarm zones in adjacent
building.
Upon activation of the localized standalone smoke
detector, an alarm signal shall be sent to the fire alarm
panels of both the station & the adjacent building.
Where motorised fire-rated shutters are provided, the
fire-rated shutters after closing shall remain closed and
be rendered inoperative until the alarm has been reset.
Note: This alarm signal is not used to trigger the
building fire alarm but is intended to provide the status
that the shutter is activated and is used as a means to
reset the fire alarm panel to reopen the fire shutter after
its activation. Therefore, the smoke detector located at
the side of the shutter is not part of the building fire
alarm.
(e) Use of fire shutter not exceeding 6m in width is
permitted.
Station
entrance
Fire separation
Unprotected
openings
Fire-rated
shutters
Standard for Fire Safety in Rapid Transit Systems 131