Final answer:
Handrails are required on stairways with four or more risers to ensure safety by providing balance and stability. This is a general safety rule applicable in many building codes.
Step-by-step explanation:
In compliance with safety regulations, handrails must accompany a stairway that has four or more risers. This is a standard safety requirement to prevent falls and injuries when the staircase provides sufficient height that could lead to a significant risk. It is important that the handrails are properly installed and maintained to ensure they can effectively serve their purpose of helping individuals maintain balance and stability when ascending or descending the stairs.