Originally Posted by jherrero
Thanks for that info. I think I'm going to go with that. Are those flat stringers held down with something?
2x4s laid flat on the floor (16" on center), with OSB laid on top. Since the OSB is screwed into the 2x4s, everything is held together by the screws. A 2x4 needs to straddle courses of OSB so that each course is screwed to the previous course. Sort of like building the wall of a house, but the 2x4s are flat.