Is Lami's theorem used in the design of cranes as the image below suggest? [![enter image description here][1]][1]
If so, could the generalization presented in this link 

https://math.stackexchange.com/questions/4490209/generalizing-lamis-theorem

be used in the design of more efficient cranes given that we have four vectors? Sorry if this question is stupid.


  [1]: https://i.sstatic.net/XV6WX.jpg