A stairway with a handrail installed on one side only shall develop a minimum width of _____.

• A. 31-1/2 inches
• B. 29 inches
• C. 32 inches
• D. 34 inches

Answer: (A)

A stairway with a handrail installed on one side only must meet specific width requirements to ensure safety and accessibility. The minimum width of 31-1/2 inches is established in various building codes to provide adequate space for safe navigation, especially for individuals who may rely on the handrail for support. This size allows enough room for people to ascend or descend without feeling cramped and accommodates the movement of users, including those who may have mobility aids.

The specification of 31-1/2 inches helps to balance safety with practical use, allowing for comfortable access to the stairway while reducing the risk of accidents. This width is particularly important since the presence of a handrail on only one side means that the other side is left open, potentially making the stairway feel less secure. Thus, adhering to this guideline promotes both functional use and safety in building design.

The other width options do not meet the minimum standard required for a handrail on one side, which could lead to unsafe conditions on stairways and is typically not compliant with building codes that regulate safety.