What is the maximum allowable riser height for stairs?

The maximum allowable riser height for stairs is 7 and 3/4 inches. This regulation is derived from building codes that aim to ensure safety and accessibility in stair design. Riser height is critical because it affects how comfortable and safe it is for individuals to ascend and descend stairs. Heights that exceed 7 and 3/4 inches can lead to increased risk of trips or falls, particularly for individuals with mobility challenges, children, or the elderly.

Building codes often establish these standards based on extensive research and real-world observations of stair use. By adhering to this maximum riser height, builders and inspectors can help ensure that stairways provide a consistent and safe environment for users.

While different building codes may have slight variations, the 7 and 3/4 inch height is widely accepted in many areas, ensuring that structures meet safety standards while accommodating the needs of the general public.