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A Stair turning through three right angles is known as a ________ stair.

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A Stair turning through three right angles is known as a ________ stair.

(a) Three Quarter Turn

(b) Two Quarter Turn

(c) Four Quarter Turn

(d) Single Quarter Turn

I had been asked this question during an interview for a job.

The query is from Types of Stairs topic in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials

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The correct option is (a) Three Quarter Turn

Easy explanation: In Three Quarter Turn, an open well is formed. This type of stair is used when the length of the stairs Limited and when the vertical distance between the two floors is quite large.

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