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

SECTION 2.10
ABOVEGROUND TRAINWAYS
2.10.1 CONSTRUCTION MATERIALS
2.10.1.1 Aboveground trainways shall be constructed of noncombustible
materials.
2.10.1.2 The elements of structure for aboveground trainways shall
have a fire resistance of not less than 2 hours.
2.10.1.3 Test of fire resistance shall be in accordance with Cl.2.3.4.
2.10.1.4 Coverboard or any protective material used to provide safety
isolation from the contact traction power rail shall have a
flame spread rating of not less than Class 1 as specified in
Cl.2.3.13.3 when tested in accordance with BS 476: Part 7.
2.10.2 SETBACK DISTANCE
2.10.2.1 Setback distance between trainway structure and adjacent
building
(a) The setback distance between the proposed trainway
structure and the adjacent building shall comply with
the distance stipulated in Appendix D based on the
extent of unprotected openings in the external wall of
the adjacent building, using the outermost edge of the
proposed trainway structure as the relevant boundary,
or at least 6m clear of the outermost edge of the
proposed trainway structure, whichever is greater
(Diagram 2.10.2.1(a)).
(b) For proposed trainway located outside the development
boundary of a private development, the distance
between the adjacent building(s) and the outermost
edge of the proposed trainway shall be at least 6m
(Diagram 2.10.2.1(b)).
2.10.2.2 The setback distance shall be measured from the edge of
trainways to the external wall of the adjacent buildings.
2.10.2.3 The height of the enclosing rectangle used in the calculations
shall be measured up to the height of the trainways.
Construction
materials
Setback
distance
Standard for Fire Safety in Rapid Transit Systems 149