Final answer:
The correct answer to the question regarding the allowed protrusion below the handrail on stairways is 4.5 inches according to common building codes.
Step-by-step explanation:
The correct answer is option 4.5 inches. According to many building codes, including those informed by the International Building Code (IBC), horizontal protrusions like treads, trim, and stringers on stairways must not extend more than 4.5 inches beyond the minimum unobstructed width of the stairway at or below the handrail level.
This is to ensure safe passage and prevent tripping hazards. These building codes are implemented to establish safety measures in residential and commercial construction.
It is essential for architects, builders, and inspectors to be knowledgeable about these guidelines to maintain safety protocols in building design and construction.
The correct answer is option 36 inches or less. This question pertains to building codes and regulations for handrails on stairs.
According to the International Building Code (IBC), projections of 36 inches or less located below the handrail, including treads, trim, stringers, or other items, are permitted.
This means that any item sticking out from the wall, such as the treads or trim of a stair, must not extend more than 36 inches below the handrail.