As the below picture, is the rough blue print of the 12'6" x 12" deck for my new house.
Following the code, all joists(blank rectangular) are 2 x 8 16" OC, the blue rectangular is the beam, and gray rectangular is ledger board which already attached to house by builder. The yellow rectangular is the post for aluminum railing(only draw right side), the railing post size is 4 x 4 inch at the bottom(mount by bolt and blocking board, see figure 2).
Because I want to give more space for the deck and make the railing parallel with the house side wall, I need to make the right joist 2.5" (total 4" gap, 1.5" for board thickness) away the ledger board due to the ledger board is short, the other side of the joist can sit on the beam.
How to frame the right joist to make it strong enough for the railings?
railing post mount (figure 2)