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Clause 3.1 General Clause 3.2 Provision of compartment walls and compartment floors Clause 3.3 Fire resistance of elements of structure Clause 3.4 Test of fire resistance Clause 3.5 External wall Clause 3.6 Separating walls Clause 3.7 Compartment walls and compartment floors Clause 3.8 Protected shafts Clause 3.9 Protection of openings Clause 3.10 Exit staircases Clause 3.11 Concealed spaces Clause 3.12 Fire stopping Clause 3.13 Restriction of spread of flame over surfaces of walls and ceilings Clause 3.14 Roofs Clause 3.15 Materials for construction Clause 3.16 Use of plastic material Annex 3A - Notional Periods Of Fire Resistance Annex 3B - Permitted Limits Of Unprotected Areas

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Clause 3.2 Provision of compartment walls and compartment floors

CPFPRTS 2022

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3.2.1 Compartment size - floor area & cubical extent

Any station which has:

a. Any storey the floor area of which exceeds that specified as relevant to a station of that height in column (2) of Table 3.2A, or

b. A cubic capacity which exceeds that specified as so relevant in column (3) of Table 3.2A,

shall be divided into compartments by means of compartment walls and compartment floors so that:

(1) no such compartment has any storey with a floor area of which exceeds the area specified as relevant to the station in column (2) of Table 3.2A; and

(2) no such compartment has a cubic capacity which exceeds that specified as relevant in column (3) of Table 3.2A.

Exception: Size limitation of compartment shall not apply to the public area below ground level. Compartment size for public area below ground level shall comply with Cl.3.2.4e..

3.2.2 Cubical extent for compartment

a. Compartment exceeding 4m in height

In computing the cubical extent of compartments, the height of 4m shall be used where the actual height exceeds that figure.

If any compartment contains mezzanine, galleries or lofts, the full height of the compartment shall be used in computing the cubical extent.

b. Open-side covered walkway/ link-bridge

Where station is connected to another station or building by external open-sided covered walkway or open-sided covered link-bridge, the station/ building is considered as separate station or building, if they comply with the following conditions:

(1) There is no commercial activities or other usage that would pose a fire risk within the covered walkway or link-bridge.

(2) The width of the covered walkway or covered link-bridge shall not exceed 6m clear width.

3.2.3 Compartmentation by height

a. In any compartment up to a habitable height of 24m, no compartment shall comprise more than three storeys.

b. In any station which exceeds 24m in habitable height, no compartment shall comprise more than one storey for compartments at storey level exceeding 24m above average ground level.

3.2.4 Situations requiring compartmentation

The following situations shall require compartmentation by provision of compartment walls and/ or compartment floors:

a. Separation of transit and non-transit occupancies

Transit and non-transit occupancies shall have a fire separation of at least 2-hrs. Stations connected to non-transit occupancies shall comply with the relevant requirements of Chapter 9.

b. Separation of public and ancillary areas

(1) All public areas shall have a fire separation of at least 2-hrs from ancillary areas.

(2) Exception

(a) Fire separation shall not apply to Passenger Service Centre, station master room, ticketing office and enclosures housing ticket vending machines.

(b) Platform public areas need not be fire separated from the trainway and buffer areas.

c. Separation of commercial spaces

(1) Commercial spaces shall be compartmented by having not less than 2-hrs fire resistance construction. If sprinkler protection is provided, the fire resistance rating can be reduced to at least 1-hr.

(2) Shops with a maximum aggregated area of 115m2 (where no individual shop unit shall exceed 100m2) are allowed in the public area except at platform level. The shops can be subdivided into several smaller units by fire compartments. Where the concourse is located on the same level as the platform, no shops shall be permitted.

(3) Exception

(a) Additional commercial spaces shall be permitted in stations, provided these commercial spaces are located on a separate level other than the platform and concourse levels and comply with the relevant requirements in the Code of Practice for Fire Precautions in Buildings. Fire separation is required only at the periphery around the large commercial space as shown in Diagram 3.2.4c..

(b) Where commercial spaces at the ground level of station entrances of underground stations are not located along the station’s means of egress, and smoke generated from a fire in the commercial spaces will not be drawn into the station, these commercial spaces are not required to be compartmentalised.

(c) Commercial spaces in aboveground stations

(i) Where commercial spaces in above ground stations are not located along the station’s means of egress and are located more than 6m from the edge of the guideway, these commercial spaces are not required to be compartmentalised.

(ii) That parts of the external wall and roof of commercial spaces in aboveground stations not located along the station means of egress and more than 6m from the edge of the guideway, are not required to be fire-rated.

(iii) For aboveground or elevated stations, there is no restriction on the unpaid area taken up by shops after the point of safety or other locations stipulated in Cl.2.2.3e..

d. Separation between viaduct and M&E plantrooms/ commercial spaces

For aboveground stations, M&E plantrooms and commercial spaces located directly beneath and within 3m of the viaduct shall be compartmentalised from the viaduct by a fire resistance construction of not less than 2-hrs. If sprinkler protection is provided, the fire resistance rating can be reduced to at least 1-hr.

e. Basement floors

In any compartment below ground level, no compartment shall comprise more than one storey, except for the public area which shall not exceed 3 storeys per compartment.

f. Special purpose rooms

Special purpose rooms shall be compartmentalised in accordance with Table 6.4A.

g. Areas of special hazard

(1) Transformer rooms, generator rooms, and any other area of special high risk shall be separated from other parts of the station by compartment walls and floors having fire resistance of at least 4-hrs. However, for transformer rooms which do not utilise flammable liquid, they shall be separated from other parts of the station by compartment walls and floors having fire resistance of at least 2-hrs;

(2) Room housing transformer that uses flammable liquid shall be located at ground level against an external wall; and

(3) Diesel fuel tank for emergency generator need not be located against an external wall

h. Coldroom

Coldroom shall comply with the prevailing Code of Practice for Fire Precautions in Buildings.

i. Underground bicycle parking area for transit occupants

Underground bicycle parking area including the bicycle kiosk shall be compartmentalised from the station public area with at least one dedicated exit staircase and exit access door to station public area; sprinkler-protected and provided with smoke purging system. The bicycle kiosk’s size shall be limited to 30m2. Types of trades and services permitted in the stations are given in Table 1.4A – Code H.

3.2.5 Permitted appliances within station

The conditions for appliances permitted within the station shall be as follow:

a. Automatic vending machines

Clusters of automatic vending machines are allowed in the public (unpaid) area except at platform. Each cluster of vending machines shall consist of not more than two vending machines and clusters of vending machines shall be placed at least 1m apart.

b. Light-emitting diode (LED) digital screens

LED digital screens installed at the transit station shall not impede passenger flow/ evacuation and shall not block visibility of exit signs. Clusters of LED digital screens are allowed in the transit station. Each cluster of LED digital screens shall not have more than two LED digital screens and clusters of LED digital screens shall be placed at least 2m apart.