Exceed the rated load, the lifting weight is unknown (including buried objects) do not lift.

　　Skew pull, diagonal pull without hanging.

　　Sling does not meet the safety requirements, lifting machinery safety device failure do not lift.

　　Angular objects and wire rope directly connected without protective measures do not hang.

　　The strength of the lifting point is not enough, the binding is not strong or the material is too full.

　　Hoisting command signal is unknown or illegal command, dim light is not hanging.

　　The crane lifts heavy objects directly for processing without lifting.

　　There is a person standing on the hanging object or there is a suspended object on the hanging object.

　　Oxygen cylinders, acetylene cylinders and other flammable and explosive products are not suspended without safety measures.

　　Strong winds, heavy rain, fog and other bad weather above six are not suspended.

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