Discussion Starter · #1 ·
I'm widening an interior wall (to 10") so that I can frame a book case around an open doorway. When building a double wall (on slab) can I just use two PT 2x4s w/ space between as bottom plates or do I use a 2x10? W/ the 2x4s, only worry would be the walls moving independently (swelling/shrinkage) causing cracked joints in drywall (as well as any code violations). I've seen pics of the 2x4s connected w/osb/ply underneath to tie them together(???) but this was on top of ply subflooring not slab concrete. There will also be a 4x4 post sitting on the plate supporting a 2x12 beam. What's the best way to do this? Living in TX if that matters. Thanks!!