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Blocks of flats over 5m in height, top floor ceiling fire resistance requirements?

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Hello all, just a very quick question, in blocks of flats of 3 storeys or more (but under 18m) i can't find anywhere that specifies the fire resistance requirements of the top floor ceiling, Table B4 states walls and load bearing structures, but not specifically ceilings. Anyone got any tips on where to confirm this please? 

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