Alright, so delineated (by a curb, a fence, a single rail, posts w/ single chain, etc) but not necessary to meet the guardrail requirements because the adjacent roof area is not a walking surface? Is that the conclusion?
1015.2 Where required. Guards shall be located along
open-sided walking surfaces, including mezzanines, equipment platforms, aisles, stairs, ramps and landings that are located more than 30 inches (762 mm) measured vertically to the floor or grade below at any point within 36 inches (914 mm) horizontally to the edge of the open side.Guards shall be adequate in strength and attachment in accordance with Section
1607.8.