Rated weight Hoist equipment during normal operation, allowing the heavy lifting or material with separable or spreader attachment (such as grab, electromagnetic chuck, balance beams, etc.) the total mass in units of t. For variable amplitude lift hoist, electric hoist as tower crane, truck crane, electric hoist, electric hoist gantry crane boom-type lift hoist, etc., with their nominal weight is amplitude variation. Its nominal nominal weight refers to the minimum amplitude when lift hoist enhance safe working conditions to allow the maximum rated capacity, also known as maximum weight. To be able to represent several amplitude range from the weight, sometimes used to represent fractions, such as 15/20/50 (nominal weight means that depending on the magnitude divided 15,20,50) three.
Often spoken from the weight, all refer to rated capacity. In order to design, manufacture series of standardization, the State developed a series of standards from the weight, lifting weight lift hoist machinery series see GB GB785-65.