The rise of every step in a stairway should not exceed how many millimeters?

The guideline that the rise of every step in a stairway should not exceed 200 mm is established to ensure safety and comfort for users. When stair risers are too high, they can pose a risk of stumbling or falling, especially for individuals with mobility issues, children, or the elderly. A maximum rise of 200 mm provides a balance between building efficiency and user safety, facilitating easier navigation of stairs.

Standards often reference this height in building codes to promote uniformity in architectural design, ensuring that all stairways adhere to a common safety criterion. By limiting the rise to 200 mm, it helps to create an environment that is more accessible and reduces the physical effort required to ascend or descend, improving the overall user experience.