A stair riser is the near-vertical element in a set of stairs, forming the space between one step and the next. It is sometimes slightly inclined from the vertical so that its top is closer than its base to the person climbing the stairs.

What is the purpose of stair riser?

The stair risers are the vertical pieces on the stairs. The height of each step is called the rise. It's used in calculations to determine a safe and comfortable design. All stairs have a rise, but they may not all have risers.

What is the difference between stair treads and risers?

Stair treads are the horizontal pieces of the staircase that you step or “tread” onto. ... Stair risers are the vertical “back” pieces of the steps. Most staircases inside the home have a riser for each step. However, other staircases (such as outdoor deck stairs) have an open back and do not use stair risers.