【1】 Large, irregularly shaped weights, or spheres and cylinders. There are two problems with such heavy objects. First, the center of gravity is unstable. Second, it is difficult to bind and fix. Once the binding is not true, it is easy to fall and cause danger.

【2】 Some scattered and scattered heavy objects, such as waste iron slag and waste stone, are easy to fall during lifting. It is recommended to use appropriate containers for placement before lifting.

【3】 Hot melt, some dangerous goods are prone to thermal deformation under high pressure and high temperature operation environment

【4】 Because the size and weight of semi buried heavy objects cannot be determined, it is forbidden to use chain block for lifting without knowing. After all, chain block is only lifting equipment, not excavation equipment.

【5】 For inflammable and explosive dangerous goods, the chain block for general use cannot be used. The chain block has explosion-proof chain block for inflammable and explosive environment. Ordinary chain block is easy to cause friction when lifting, and inflammables and explosives are easy to cause danger once heated.