I am building a 12 x 16' (one car) garage rooftop deck and will be anchoring ledger boards into the brick pa****t wall on the east and west sides to ideally hang 12' 2x10 joists, working with pressure treated pine. I already have the 12' stock and am trying my best to use it!
Problem: The width within the pa****t walls is 12' 8". Can I anchor a double ledger on the east side (stacked 2x8s) and maybe even a triple ledger on the west side, bolt them all into the brick wall with 6-10" lag anchors to create the 12' width needed to hang the joists? The brick is in excellent condition, but I'm concerned about boards twisting and if the brick walls can support it.
I'm trying to avoid contact with the roof membrane all together.