IRC Building Residential Inspector Practice Exam

Handrails for residential stairs must be within a specific height range to be safe and comfortable to grip. The required height is between 34 inches and 38 inches above the nosing of the treads, and this applies to at least one side of a stairway that has four or more risers. The measurement is taken vertically from the nosing to the top of the handrail.

This range—34 to 38 inches—fits most adult reach and grip needs, helping prevent slips and confusion when moving up or down stairs. Ranges that start below 34 inches are too low to grab securely, while ranges that exceed 38 inches can be awkward to grasp and may reduce stability. Therefore, the only choice that aligns with the standard is the 34–38 inch range.