aldumoul
I would believe the fillet weld would be a good start, the length & the interval would depend on the strength required.
do the calcs !
I would follow as suggested on the other thread prior to this post. to follow the guidelines of the AWS.
is this a simple holding device, & there any safety issues. one must think out the ramifications if it is done incorrectly.
a destructive test on one article would be a good bet that the final product will work for your requirements.
in other words test one or two parts, to make sure it will hold. or re weld & repeat the test until the it passes.
Good luck
Mfgenggear