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

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APPENDIX C - cont<strong>in</strong>ued<br />

PART II : REINFORCED CONCRETE BEAMS<br />

Description<br />

1. Re<strong>in</strong><strong>for</strong>ced concrete beams without any protection shall<br />

comply with SS CP 65 Part 2.<br />

2. As (1) with cement or gypsum plaster 15mm thick on light<br />

mesh re<strong>in</strong><strong>for</strong>cement<br />

(a) average concrete cover to ma<strong>in</strong> re<strong>in</strong><strong>for</strong>cement<br />

(b) beam width<br />

3. As (1) with vermiculite/gypsum plaster** 15mm thick:<br />

(a) average concrete cover to ma<strong>in</strong> re<strong>in</strong><strong>for</strong>cement<br />

(b) beam width<br />

M<strong>in</strong>imum dimension of concrete to give a fire<br />

resistance <strong>in</strong> hours<br />

4 2 1<br />

mm mm mm<br />

- - -<br />

4. Light weight concrete shall comply with SS CP 65 Part 2. - - -<br />

* Supplementary re<strong>in</strong><strong>for</strong>cement, to hold the concrete cover <strong>in</strong> position, may be necessary.<br />

** Vermiculite/gypsum plaster should have a mix ratio <strong>in</strong> the range of 1 ½ - 2:1 by volume.<br />

<strong>Standard</strong> <strong>for</strong> <strong>Fire</strong> <strong>Safety</strong> <strong>in</strong> <strong>Rapid</strong> <strong>Transit</strong> <strong>Systems</strong> C-4<br />

50*<br />

250<br />

25<br />

170<br />

30<br />

170<br />

15<br />

125<br />

15<br />

85<br />

15<br />

60

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