Answer:
The nosing is the edge of the step or tread that projects beyond the riser.
Explanation:
C is the correct answer
Nose: It is the protruding part of the tread behind the front of the riser.
It is the protruding part of the tread behind the face of the riser. The nose is usually rounded to give the treads a good aesthetic effect and to make the staircase comfortable and easy to use
Approved document K - Protection against falls, collisions and impacts defines the "leading edge" of a staircase as the "rising edge of a stair step". The pitch of the steps is the angle of inclination between the horizontal plane and the line connecting the edges.
A staircase is a set of steps that allow access from floor to floor. The room or enclosed space of a building in which a staircase is located is called a staircase. A staircase provides access and communication between floors in multi-storey buildings.
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