What is the maximum riser height for stairways in Group R-3 occupancies?

In Group R-3 occupancies, which typically include residential units like single-family homes and duplexes, the maximum riser height for stairways is indeed 7-3/4 inches. This maximum height is established to ensure safety and accessibility for residents, as steeper risers can pose a tripping hazard and make it more difficult for individuals to navigate stairs, particularly for children and elderly occupants.

This standard is guided by the International Building Code (IBC) and aligns with recommendations for residential buildings, balancing safety with practicality for everyday use. By keeping the riser height to a maximum of 7-3/4 inches, the design promotes safer egress and enhances the overall comfort of stairway use, ensuring that they are easier to ascend and descend.

The other options present taller riser heights that are not permissible for Group R-3 occupancies, as they exceed the code's safety recommendations. This is particularly important in residential environments where the potential for accidents is heightened due to varied ages and mobility levels among residents. Thus, adhering to this 7-3/4 inch maximum is crucial for compliance and the overall safety of the building's occupants.