Knowledge sharing: Balance beam is an important part of hoisting equipment, which is widely used in lifting engineering. Balance beam is also called iron pole. It can be used to maintain the balance of the lifted equipment, avoid the damage of the equipment by the sling, shorten the height of the sling, reduce the lifting height of the movable pulley, and reduce the horizontal pressure of the equipment when lifting, so as to avoid damage to the equipment. When multi-machine lifting, the balancing beam can also reasonably distribute or balance the load of each lifting point.