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The protecting part of the tread beyond the face of Riser is known as a __________

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The protecting part of the tread beyond the face of Riser is known as a __________

(a) Pitch

(b) Rise

(c) Riser

(d) Nosing

I got this question in unit test.

My question is based upon Stairs Technical Terms topic in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials

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Correct option is (d) Nosing

To elaborate: The term line of Nosing is used to denote an imaginary line parallel to the strings and tangential to the Nosing. It is useful in the construction of handrails.

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