Regarding getting the correct forces for the plate and the steel profile , it is the same problem. Using offsets(or rigid links) will give you the exact forces . Compared to the aligned model , in the offset one ,Bars will have lower bending moments and a normal force that is nonexistent in the no offset model and that also appears on the plate .
It all depends on how you want to treat/design the structure .
Rafael Medeiros
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