A stair riser is the near-vertical element in a set of stairs, forming the space between one step and the next. … The horizontal edge of the stair is called the nosing, whereas the surface on which a person’s whole foot makes contact is called the tread.

What is rise and tread of stairs?

Staircase Basics The riser is the vertical surface of the stair. The tread on the other hand is the horizontal surface of the stair and the part of the stair you step on. … The rise is the vertical dimension from tread to tread, while the run is the horizontal dimension from riser to riser (not including the nosing).

What is the riser on a stair?

Stair Riser: Risers are the boards that form the vertical face of each step, creating the “toe kick” area between the stair treads.