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Clause 9.2 - Integration and Interface for Stations

9.2.1 Scope and purpose

This Section stipulates the minimum fire safety provisions required for stations that integrate and interface with other transit lines, transit stations, and non-transit occupancies.

9.2.2 Stations with multiple transit lines

a. Hot-line telephone

Hot-line telephone(s) shall be provided for two-way communication between the PSCs of these transit lines in the station or in the absence of PSCs, the OCCs. The installation shall comply with SS 546.

b. One-way emergency voice communication system

Where one-way emergency voice communication system is provided for the different transit lines within the station for their respective concourse and platform areas, this one-way emergency voice communication system shall be designed such that announcements can be made by one of the transit lines over all the one-way emergency voice communication systems in the station simultaneously during an emergency.

c. Fire alarm panel

One main fire alarm panel shall be provided in accordance with Cl.6.3. Where separate fire alarm systems for the different transit lines are desirable, separate fire alarm panels may be provided. These fire alarm panels shall be located, in accordance with Cl.6.3 next to each other.

9.2.3 Stations with interchange-link

a. Interchange-link shall not be included in the calculations of station exit capacity.

b. Hot-line telephone

Hot-line telephone(s) shall be provided for two-way communication between the PSCs of these stations, or in the absence of PSCs, the OCCs. The installation shall comply with SS 546.

c. Fire alarm signal

A summary fire alarm signal from each station shall be transmitted to the PSCs of the other stations connected by the interchange-link, or in the absence of PSCs, the OCCs. The transmission lines shall be electrically supervised. Upon receiving a summary fire alarm signal, an audible and visual alarm shall be activated at the PSCs or OCCs. A silencing switch can be provided to silence the audible alarm, but it shall not cancel the visual alarm.

9.2.4 Stations connected to non-transit occupancies

a. Underground station integrated with non-transit occupancy

Where an entrance of an underground station is integrated with a non-transit occupancy, the following shall be complied with:

(1) Station entrance

The entrance shall comply with the relevant fire safety requirements in other chapters of this Code.

(2) Fire separation

The entrance shall be fire separated from the non-transit occupancy with fire barriers having at least 2 hours fire resistance.

(3) Unprotected openings

There shall be no unprotected openings at the non-transit occupancy area within 3m of the ventilation openings located in the external wall of the entrance.

(4) Fire-rated shutters

Where fire-rated shutters are installed to provide the fire separation required in Cl.9.2.4a.(2), it shall be in accordance with Cl.3.7.6d.(1).

b. Stations with underground link to non-transit occupancy

Where a station has an underground link connected to a non-transit occupancy, the following shall be complied with:

(1) Underground link

The link shall not be used as means of escape. The underground link shall be considered as part of the station and shall comply with the relevant fire safety requirements in other chapters of this Code.

(2) Fire-rated shutters

The station shall be separated from the non-transit occupancy by fire-rated shutters having at least 2-hrs fire resistance. The fire-rated shutters shall be in accordance with Cl.3.7.6d.(1).

c. Station with elevated link to non-transit occupancy

Where a station has an elevated link/ overhead-bridge connected to a non-transit occupancy, the following shall be complied with:

(1) Elevated link.

The link shall not be used as means of escape. The elevated link shall be considered as part of the station and shall comply with the relevant fire safety requirements in other chapters of this Code.

(2) Where the elevated link is enclosed and provided with mechanical ventilation or air-conditioning, means shall be provided to prevent smoke generated from a fire in the non-transit occupancies to migrate into the station.