I have a 1950's era house where the main living room cantilevers out past the foundation wall approximately 2-3'. Typically, the floor joists run north-south. in order to frame the cantilever, the joists change direction and run east-west. At this change in direction, the floor joists were notched at the top corner and a 2x2 was installed flush with the top of the joists. Anyone have any ideas what the purpose of this 2x2 is? Was this a typical framing detail in the 1950's? I have attached a picture and a sketch for reference.
At the living room floor, there is a gap in the hardwood at the point where the joists change direction - basically directly over the 2x2 ledger. Filling the gap in the floor is not a problem, but I am trying to figure out if the gap in the floor and the 2x2 member are related.