What is the maximum size allowed for a stair riser according to safety standards?

The maximum size allowed for a stair riser according to safety standards is 7 3/4 inches. This measurement is critical for ensuring safety and accessibility in stair design. A riser that exceeds this height can pose a greater risk of accidents, as it may make the stairs more difficult to navigate, especially for individuals with mobility challenges.

Safety standards, such as those outlined in the International Building Code (IBC) and the Occupational Safety and Health Administration (OSHA) guidelines, are in place to promote uniformity and safety across different structures. Keeping risers at or below the specified height helps maintain safe stair dimensions, reducing the likelihood of missteps or falls.

Any sizes listed above the max standard, such as those in the options provided, exceed this safety recommendation, emphasizing the importance of adhering to the established guidelines for safe construction practices.