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The ___________ stairs are useful where the space available is limited and where the traffic is less.(a) Straight(b) Turning(c) Spiral(d) GeometricalI had been asked this question in an interview.My question is based upon Types of Stairs in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials

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Correct OPTION is (C) Spiral

The best explanation: The core of spiral stair maybe solid and HOLLOW and the stair MAY be provided with cut or CLOSED strings. The height of the floor and riser respectively 3.68 M and 160 mm.



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