What is the minimum height requirement for a stair riser?

The minimum height requirement for a stair riser is commonly set at 4 inches. This standard ensures that stairways are not too steep, which can create a safety hazard for users. A riser height of 4 inches is low enough to allow for safe, comfortable navigation of stairs while still being sufficient to distinguish the steps clearly.

Building codes often specify this height to provide consistency and prevent accidents caused by steps that are either too high or too low. Heights below the minimum can lead to trips or falls since they may be less visible to users. Conversely, heights exceeding the maximum limit could lead to undue strain while ascending or descending the stairs.

Thus, while other options may be based on varying interpretations of safety measures, the accepted minimum standard aligns with 4 inches as the necessary height for a riser in a stairway.