I'm building a tray ceiling and the assembly is easy to visualize.
In a 14' x 14' dining room, I'm coming in 18.5" to the inside of the beam on 2 sides with a 2x10, and then similarly cross-wise between them the other way, also 18.5" in. Those in-between beams are hung with a 2x10 joist hangar.
So there is a 18.5" "band" all around and then it goes up with new joists 12" above the base level.
My question is regarding the band area. The finger joists are only going to be 17" of span, with the other end sitting on the outer wall plate. Are 2x4 joist hangars necessary for such a short span? And bonus, do they need to be 16" O.C. or will 24" O.C. suffice? Thanks