What is the minimum depth of a step?
Also asked, what is the standard depth of a step?
The general rule (in the US) is 7-11 (a 7 inch rise and 11 inch run) (17.78cm-27.94cm). More exactly, no more than 7 3/4 inches (19.7cm) for the riser (vertical) and a minimum of 10 inches (25.4cm) for the tread (horizontal or step).
Subsequently, question is, at what height is a step required? Researchers found that the ideal step height is 7.2 inches and the ideal step length should be anywhere between 11 and 12 inches.
Consequently, what is the minimum depth of a stair tread?
How wide does a step need to be?
- The stair treads should be at least 36 inches wide. But, we recommend that stairs should be at least 48 inches wide so they don't feel cramped. - The maximum allowable stair rise is 7 3/4 inches, and the minimum stair rise is 4 inches.