What is the maximum riser height for a single step at exterior doors of specific building occupancies?

The maximum riser height for a single step at exterior doors of specific building occupancies is set at 7 inches. This standard is established to ensure safety and accessibility for building occupants. A height limitation of 7 inches helps to prevent tripping hazards, which can be especially important at doorways where individuals may be entering or exiting, often carrying items or in varying lighting conditions.

Setting the limit at this height promotes consistency and predictability in step design, which is critical for users to navigate safely. A maximum of 7 inches allows for an adequate rise that is manageable for most users, including individuals with mobility challenges. This regulation aligns with universal design principles aimed at ensuring that facilities are accessible to everyone.