Applies to the construction, installation, operation, inspection and maintenance of overhead and gantry stacker cranes with top running or under running bridge, multiple girder. The vertical mast for guiding the carriage is attached to the top running or under running trolley. These cranes are grouped because they all have the same features in vertically guiding the lifted load. Stacker cranes in this grouping include semi-gantry, cantilever gantry, and others having the same fundamental characteristics.
Volume B30.20 includes provisions that apply to the marking, construction, installation, inspection, testing, maintenance, and operation of below-the-hook lifting devices, other than components addressed by other ASME B30 volumes or other standards, used for attaching loads to a hoist. The requirements in this Volume also apply to clamps used for positioning and anchoring.