Buildings greater than 22 feet (6706 mm) in height with roof slopes less than 2.4 units vertical in 12 units horizontal (20-percent slope) shall be provided with a parapet, railing, fence, or combination thereof, not less than 42 inches (1067 mm) in height. Railings or fences may be located inward from the face of the exterior wall a distance not exceeding 6 feet (1829 mm). Railings or fences shall be of noncombustible material, except on buildings of Type V construction. Railings shall be constructed to comply with the requirements of Sections 1012 and 1607.7.
Rooftops used for recreational purposes shall be provided with wire fencing at least 10 feet (3048 mm) in height. Openings in the fence shall not permit the passage of a 4-inch diameter (102 mm) sphere. Where ball games are played on rooftops the wire fencing shall be extended to provide an overhead closure.