I ran a drain pipe from the basement laundry tubs along the wall to the other side of the basement where the drain was. It worked fine. Last year we had an extension added to the house and in doing so wound up with pipe running through a doorway 1 foot off the floor. We now have to step over the pipe to go through the door. Would I be able to drop the pipe in a u bend at that point.

If you don't wish to break up the cement and run the drain correctly I would drop the drain to the floor and run it straight to the terminal instead of "U" bend. Good luck, Tom