What is the maximum riser height for stairs?

The maximum riser height for stairs is 250 mm. This standard is in place to ensure that stairways are safe and accessible for users. A riser height of 250 mm strikes a balance between safety and usability, minimizing the risk of trips and falls while allowing for comfortable ascent and descent.

In building codes, height restrictions are often established based on studies of ergonomic factors, which determine how people naturally navigate stairs. Going above this height can make stairs difficult to negotiate for many individuals, particularly those with mobility impairments or when carrying objects.

The other listed heights are typically found in various codes and regulations, but 250 mm is the most commonly adopted maximum standard in many jurisdictions, aligning with various accessibility guidelines.