Tying in floor joist to existing structure

I am expanding/extending my current bedroom and bath which will require removing rear exterior wall. My question is when tying in the new floor joist I plan to use 2x10 with one end sitting on the top plate of the new wall and the other I plan on using joint hanger to tie it into the existing rim board. will I have to double up the existing rimboard like I would for adding a deck? If I dont I know I will have 1" of nail sticking through the backside of the existing rim board going through the joist hanger.