Fw: crimping of aluminum

Good morning,

 

I am looking at a piece of aluminum equipment of sizable weight.  The legs are connected to the main body through CRIMPING.  Being subjected to an array of forces and moments, these connections are the most responsible structural joints of the subject unit.

 

Evidently, such connections are being used by the industry, but how can they be structurally evaluated/justified?

 

Can somebody point me to any document that would provide properties for, or specify the installation of, such connections? 

 

Thanks,

 

V. Steve Gordin, SE
Irvine CA