What is the maximum elevation change for which sloped surfaces must be used in a means of egress?

The maximum elevation change for which sloped surfaces must be used in a means of egress is 12 inches. This requirement is in place to ensure accessibility and safety. When elevation changes exceed this limit, a more gradual slope is necessary to accommodate individuals with mobility impairments. Sloped surfaces allow for a transition that is easier to navigate than stairs for those who may use wheelchairs or have other accessibility needs.

Using a maximum elevation change of 12 inches helps to ensure that egress routes are functional for all individuals, enhancing overall safety in emergency situations where swift evacuation is critical. Furthermore, this standard aligns with the guidelines established in codes such as the International Building Code (IBC) and the Americans with Disabilities Act (ADA), both of which prioritize accessibility in building design and means of egress provisions. The other choices fall below the prescribed standard, making them less supportive of universal access.