ASME B30.122 pdf download Overhead and Gantry Cranes (Top Running Bridge, Single or Multiple Girder, Top Running Trolley Hoist) Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings (b) Existing Installations.Equipment manufacturedand facilities constructed prior to the effective date ofthis Volume of the B30 Standard shall be subject to theinspection, testing, maintenance, and operation requirements of this Standard...