Very, very few trades worry about the next guy. The carpenter does not worry about where the plumber is going to drill a hole when he shoots a nail, although they seem to be able to figure it out so the nail is at least somewhere that the hole has to go. The electrician does not worry when he runs his wire through the center of the wall. The heating guy cuts the plumber's vent lines when they are in the way, and you expect the plumber to spend extra time because THEY might have a problem with HIS installation? If the floor installer is going to have a problem then have the carpenter install 2x4's between the joists during the framing so the plumber can strap his pipes to them.