Does the size of the lifting lug's backing plate affect the force of the lifting lug?
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Please tell me, does the size of the pad of the lifting lug affect the force of the lifting lug? Does the size of the pad need to be in accordance with the standard?
Standards are determined based on certain actual situations.
The size of the lifting lug's backing plate can affect the stress of the lifting lug. A larger backing plate can provide a larger support area, disperse the force borne by the lifting lugs, reduce stress concentration on the backing plates, and thereby increase the load-bearing capacity of the lifting lugs. However, the size of the backing plate does not necessarily need to be in accordance with the standard. When designing and using lifting lugs, factors need to be considered based on the specific situation, such as the weight, shape, combination method of the object, and the installation conditions of the lifting lugs. If under correct design and use conditions, the backing plate size can be adjusted appropriately to meet the safe and reliable use of the lifting lugs. .
In standard 21574, only the top plate lifting lug TP is used as an example.: The lifting lugs need to be checked ① The extrusion stress of the lifting holes ② The strength of the lifting lugs head ③ The connection between the lifting lugs and the backing plate or the head ④ The strength of the fillet weld connecting the lifting lugs and the head From the formula, when there is a backing plate, the strength of the fillet weld needs to be checked, and the length and width of the backing plate affects the strength value.
Of course, the size and thickness of the backing plate is directly related to the thickness of the shell.
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