What is the minimum rise measurement for stairs according to safety standards?

The minimum rise measurement for stairs according to safety standards is typically set at 125 mm (or 5 inches). This standard is established to ensure safety and accessibility in stair design, creating a comfortable and practical step height for users. A rise measurement of 125 mm allows for sufficient stair height without making it too steep, reducing the risk of slips and falls.

A rise that is too low, like 100 mm, may not efficiently guide users through a standard flight of stairs and could lead to unusually long runs, which can be impractical. Conversely, a rise height of 150 mm or 175 mm can lead to steps that may be too steep for comfortable use, increasing the risk of accidents. Therefore, the 125 mm measurement strikes a balance between safety and usability, making it a widely accepted guideline in building codes and safety regulations.