ASME B30-20 pdf download Below-the-Hook Lifting Devices Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings lifting beam (spreader beam): a load-supporting lifter [seeFig. 5, sketch (a)]. lock bar sheet lifter: a supporting lifter [see Fig. 5,sketch (j)]. manipulating lifter: a lifter that rotates the load about oneor more axes during the lifting process (see Fig. 4).mechanical lifting...