Gussets

[Sohaib]

Originally Posted by EricH

I would guess that that's what was meant by "pocket" by the OP. It's the same basic principle as pocketing a gearbox plate or similar item, just the pocket happens to be as deep as the plate is thick.

I meant pocketing out areas of gussets where there would not be as much stress in order to save weight on larger gussets.