4 Va. Admin. Code § 25-40-1990
Fixed ladders shall be offset and have substantial railed landings at least every 30 feet unless backguards are provided.
§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.
Derived from VR480-05-1.2 § 11.19, eff. July 19, 1989.