I need to add a wall in a basement room. The wall would be placed mid span going across 7 trusses. Is there any problem placing a wall under a floor truss at mid span? The truss was not designed knowing a wall would be added.
There should be no problem adding a partition wall under trusses or floor joists. The only connection you will need is some nails or screws holding the upper plate of your wall to the joists. This will simply hold your wall up and plumb. There are no structural or load considerations in this simple wall addition.