I'm working on a 3-story police facility. We have multiple HVAC units mounted on the roof with two stairway exits leading to lower floors. The CM has mentioned that we need emergency egress lighting for the roof area. I can understand two small wallpacks adjacent to the stairway doors. But I'm at a loss as to how and why I would need to provide illumination on a roof for egress to the stairs in order to meet NFPA 101 or the UBC. I've never heard of this.
Any ideas?
Any ideas?