What is the maximum riser height allowed in stairways accessing guard towers in Group I-3 facilities?

The maximum riser height allowed in stairways accessing guard towers in Group I-3 facilities is established to ensure safety and accessibility for individuals in these environments. Group I-3 facilities typically house persons who are confined or unable to evacuate without assistance, such as prisons or mental health facilities.

By specifying a maximum riser height of 8 inches, safety codes aim to reduce the risk of falls and make it easier for individuals, including those with mobility challenges, to navigate the stairs. Heights greater than this can increase the effort required to ascend or descend, potentially leading to fatigue or loss of balance. Furthermore, maintaining a consistent and lower riser height contributes to uniformity in stair design, helping to prevent accidents.

In many building codes, including the International Building Code, 8 inches is recognized as a standard threshold for the maximum riser height in various types of stairs, particularly in facilities where safety is a paramount concern. This regulation is in place to foster a safer environment, especially in high-risk facilities like Group I-3 where the population's safety is critical.