What is the minimum tread depth for a standard stair in inches?

The minimum tread depth for a standard stair is specified as 10 inches in most building codes. This dimension is essential for ensuring safety in stair design, as a deeper tread provides more space for foot placement, reducing the risk of slips and falls during ascent or descent. When the tread depth is adequate, users can comfortably and securely navigate the stairs, which is particularly important in residential and commercial spaces alike. A tread that is 10 inches or more allows for better foot placement, accommodates various shoe sizes, and promotes proper posture while using the stairs.

In contrast, shallower treads could lead to increased hazards; therefore, codes mandate that tread depth meets or exceeds this standard to uphold safety regulations. Understanding these dimensions helps ensure compliance with building codes and promotes the overall safety of stair construction and inspection.