Ok guys. I purchased a house im going to remodel and noticed that someone at some point cut a whole 2x8 joist for the bath waste . Whats the plan of action for this in most states as im sure some of you plumbers have come across this in the US. Also i noticed that half the house had pipes running in the center of joists but only half inch cooper and the other half had the copper running below the joists. hows it ment to be or are both ways fine. In UK it's fine running pipes through joists as long as they stick within the code limits.