Lifting tongs are important auxiliary materials for industrial construction, with the country's attention to the development of heavy industry, lifting tongs products have been widely used, and achieved good results. At the same time of the rapid development of the lifting tongs industry, lifting safety accidents also continue to occur, in addition to product quality problems, a large part of the reason is caused by non-standard operation.

　　Looking at the major lifting safety accidents in recent years, we found that many operators have misunderstandings in the use of lifting tongs.

　　First, "1+1=2" : a wire rope can lift 5 tons, two wire ropes can lift 10 tons, this view is very incorrect. As the Angle of the plumb line increases, the force of the wire rope will continue to increase significantly.

　　Second, steel wire rope lifting pliers, chain lifting pliers are safe: some employees think that the safety factor of steel wire rope lifting pliers and chain lifting pliers is very high, generally not overloaded, even if there are signs when the overloaded wire rope breaks, but all this is the premise of the sling intact state. In actual use, there are often different degrees of wear and tear of the sling, if the situation is serious, the lifting pliers may suddenly break within the lifting rated load range, and the wire rope will break without warning in the case of damage, so it is necessary to check regularly and scrap in time.

　　Third, the rated tonnage on the single board lifting pliers is a load, two should be twice, this view is not completely correct. Since the single board lifting tongs are used in pairs, the rated tonnage on most manufacturers' product tongs is a pair of load, with a few exceptions, so check the instructions in detail before use.

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