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_________ stairs are light in weight, they are mostly used for residential buildings.(a) Timber(b) Stone(c) Marble(d) CantileverI got this question during an online interview.I would like to ask this question from Stairs of Different Materials in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials

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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