Some time ago, the customer called for consultation and asked how many electric hoist groups need to be ordered for lifting 20 tons of goods. He wanted to use it to lift 20 tons of heavy objects. This customer originally wanted to order four electric hoists of 10 tons group cranes. The carrying capacity is sufficient to meet 20 tons of goods. But is it true? First of all, let everyone know about the product. Group crane electric hoist requires multiple hoists to be lifted and lowered at the same time. The above customer’s selection is also very wrong. Suppose any of the group crane electric hoist chain is broken, and the remaining The three of them will also be broken due to the overload problem, and the suspended objects will fall directly, causing a major lifting accident. Then the correct method should be to choose 4 sets of 20-ton electric hoist to lift 20 tons of heavy objects at the same time, so that no matter which electric hoist chain is broken or there is a problem, the other three can carry heavy objects. Make heavy objects fall, greatly improving the safety of lifting.