ASME B30.20 addresses structural and mechanical lifting devices, vacuum lifting devices, close proximity operated lifting magnets, remotely operated lifting magnets, and scrap and material handling grapples. It offers comprehensive solutions applying to the marking, construction, installation, inspection, testing, maintenance, and operation of equipment used for attaching loads to a hoist.
ASME BTH-1 is the equipment design standard companion to B30.20. Specifically, BTH-1 provides minimum structural and mechanical design and electrical component selection criteria for B30.20 below-the-hook lifting devices.
B30.20 and BTH-1 are to be used in conjunction with equipment described in other volumes of the ASME B30 series of Safety Standards. Careful application of these Safety Standards will help users to comply with applicable regulations within their jurisdictions, while achieving the operational and safety benefits to be gained from the many industry best-practices.