Since the sewer drain is basement floor level and the ceilings are high, I plan on creating a raised subfloor and running the plumbing underneath.
I need the subfloor to be about 18" above the concrete floor. Rather than use a typical sole plate (horizontal) bolted to the floor, should I use a vertical plate bolted to the wall, and run the floor joists perpendicular to that? If I did that I could brace the vertical plate every 16" with 2x4" (also bolted to the wall) to raise a 2x10" up eight inches, then hang the floor joists from the 2x10 using hanger for a typical platform floor.
Does this make sense? Any ideas?