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

A. Masonry construction - continued
APPENDIX C - continued
PART I : WALLS - continued
Minimum thickness excluding plaster (in mm) for
period of fire resistance of
Construction and materials Loadbearing Non-loadbearing
4. Concrete blocks of Class 1 aggregate:
(a) Unplastered
(b) 12.5mm cement-sand plaster
(c) 12.5mm gypsum-sand plaster
(d) 12.5mm vermiculite-gypsum plaster
5. Concrete blocks of Class 2 aggregate:
(a) Unplastered
(b) 12.5mm cement-sand plaster
(c) 12.5mm gypsum-sand plaster
(d) 12.5mm vermiculite-gypsum plaster
6. Autoclaved aerated concrete blocks,
density 475 - 1200 kg/m3
7. Hollow concrete blocks, one cell in wall thickness, of
Class 1 aggregate:
(a) 12.5mm cement-sand plaster
(b) 12.5mm gypsum-sand plaster
(c) 12.5mm gypsum-sand plaster
(d) 12.5mm vermiculite-gypsum plaster
8. Hollow concrete blocks, one cell in wall thickness, of
Class 2 aggregate:
(a) Unplastered
(b) 12.5mm cement-sand plaster
(c) 12.5mm gypsum-sand plaster
(d) 12.5mm vermiculite-gypsum plaster
9. Cellular clay blocks not less than 50% solid:
(a) 12.5mm cement-sand plaster
(b) 12.5mm gypsum-sand plaster
(c) 12.5mm vermiculite-gypsum plaster
10. Cavity wall with outer leaf of bricks or blocks of clay,
composition, concrete or sand-lime, not less than 100
mm thick and ;
(a) inner leaf of bricks or blocks of clay,
composition, concrete or sand-lime
(b) inner leaf of solid or hollow concrete bricks or
blocks of Class 1 aggregate
11. Cavity wall with outer leaf of cellular clay blocks as 9
above and inner leaf of autoclaved aerated concrete
blocks, density 480-1200 Kg/m3
4
hours
2
hours
Standard for Fire Safety in Rapid Transit Systems C-2
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