OSHA issued an official interpretation regarding standards 1910.23 and 1910.27 in answer to a formal request. On July 12, 2000 Mr. Richard E. Fairfax, Directorate of Compliance Programs, stated it is necessary to protect the hatch while personnel are on the roof. Not only is protection required for the hatch opening but a substantial grab device for exiting and entering the hatchway.

RoofTop Accessories has a patent pending "zero penetration" guard-rail system that meets OSHA required compliance for safe egress and ingress around rooftop openings. Hatch Rail System will not damage the roof's base flashing or void your roof warranty by drilling in the curb or applying heavy iron bases on the completed roof system surface.

Required by OSHA on all roof openings
29 CFR 1910.23 and 1910.27
OSHA 1910.23
OSHA 1910.27
Official OSHA Interpretation