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_________ stairs are light in weight, they are mostly used for residential buildings.(a) Timber(b) Stone(c) Marble(d) Cantilever |
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Answer» The correct answer is (a) Timber Easy explanation: The main objective of the provision to a wooden stair is that it is easily attacked by fire and thus, in case of a fire, the occupants of upper floor cannot escape. But if a wooden stair is constructed from good quality Timber such as teak and if it’s thickness is about 45 mm it becomes sufficiently fireproof. |
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