What is the lifting capacity of the tower crane

The lifting weight is the weight that the hook can lift, including the weight of the sling, spreader and container. The lifting weight changes due to the change of the amplitude. Therefore, each crane has its own corresponding table of lifting weight and lifting amplitude. Commonly known as the work curve table. Lifting weight includes two parameters: upper limit lifting weight and upper limit amplitude lifting weight. The upper lifting capacity is determined by the design structure of the crane, mainly including its steel wire rope, hook, boom, crane structure, etc. The lifting point must be at a position with a smaller amplitude. The lifting capacity of the upper limit is not only related to the design structure of the crane, but also to its tipping moment, which is an important parameter. The lifting capacity of the tower crane varies with the number of pulley blocks of the hook. Generally, two ropes are double the lifting weight of a single rope, four ropes are double the lifting weight of two ropes, and so on. It can be changed as needed. In order to prevent the tower crane from lifting more than its upper limit, all tower cranes are equipped with weight limiters, some are called force rings, and there are multiple limit switches in the weight limiters, in addition to the limit tower crane upper limit rating In addition to the weight, weight restrictions can also be imposed during high-speed and medium-speed lifting. The lifting weight is very light at high speed, the lifting weight is medium at medium speed, and the lifting weight is heavy at low speed.