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A Stair turning through two right angles is known as a _________ stair.

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A Stair turning through two right angles is known as a _________ stair.

(a) Straight

(b) Geometrical

(c) Spiral

(d) Dog-legged

I had been asked this question by my school principal while I was bunking the class.

I'm obligated to ask this question of Types of Stairs in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials

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Correct answer is (d) Dog-legged

Explanation: In case of Dog-legged stairs, the flight run in opposite directions and there is no space between them in plan. These stairs are useful where the total width of space available for the staircase is equal to twice the width of the steps.

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