A service stair is a secondary stairway typically located in non-public or utility areas of a building, such as mechanical rooms, basements, rooftops, or staff-only zones. Designed primarily for functional use rather than aesthetics, service stairs are built to meet safety and accessibility standards while providing reliable access for maintenance personnel or staff.
They are usually constructed with steel or concrete and may feature open risers, non-slip treads, simple railings, and minimal finish. Service stair drawings are commonly included in architectural and structural plans to ensure code compliance and safe circulation in commercial, industrial, or institutional buildings.
