1. Human driven Singles girder overhead crane, the lifting hook will be tested as 1.5 times rated load
2. Motor or other power driven Singles girder overhead crane, the hoisting hook will be tested as 2 times rated load.
3. After The Singles girder overhead crane hook unload inspection load, there should not be any obvious defects and deformation, the increase opening should not exceed the 0.25% original size.
4. The overhead crane qualified hooks should be printed on the tag in the low stress area, including the rated weight, inspection marks, production numbers and so on.
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