Run lots of Conduit and instead of floor joists uses floor trusses. It makes changing plumbing and wiring much easier. Here's a picture of floor trusses. You

Run lots of Conduit and instead of floor joists uses floor trusses. It makes changing plumbing and wiring much easier. Here's a picture of floor trusses. You will see what I mean by easier to change things. http://static1.squarespace.com/static/52246eb0e4b0329755b5765e/t/52a3e1dce4b0f6168e51f282/1386471903762/FloorTrussEndView.jpg http://static1.squarespace.com/static/52246eb0e4b0329755b576...