If handrails are not continuous between flights of stairs, how far must they extend horizontally beyond the top riser?

The requirement for handrails to extend horizontally beyond the top riser is based on safety considerations. When handrails do not run continuously between flights of stairs, extending them helps provide an additional grip for individuals ascending or descending the stairs. This horizontal extension allows users to maintain their balance and reduces the risk of falling, particularly at the transition point between the stairs and the landing.

The correct distance for this horizontal extension is 12 inches beyond the top riser. This dimension is established in the building codes to ensure that there is adequate support available as a person navigates the end of the stairway. The goal is to create a safer and more accessible environment for all users, particularly those who may have mobility challenges or are carrying items that limit their ability to grip the handrail effectively.

Thus, the requirement for a 12-inch extension is a critical aspect of stair design and safety that aligns with building regulations aimed at protecting public welfare.