Step & Riser
Stair consist of a sequence of step and riser. Step is the sloping part between intermittent steps and riser is the part your toe bumps. step and riser should be structurally sound, flat, dry, clean, and smooth. They may be an exterior or interior applications.
When designing step, it is important to ensure that the dimensions of step and riser are regular. Steps should be uniform as uneven steps can trip people up. To make uniform steps evenly divide up the total height of the stairs to determine the height of riser.