I live in Colorado so with the expansive soil issues we have here we are required to build a floating wall when framing in the basement. I think I have that part figured out but have run into another issue. I want to put a wall and door around my mechanicals to separate them from the rest of the basement. I have duct work, copper water lines and gas lines running perpendicular to where I want to put the wall. How do I put in the top plate with all of the pipes and duct work there? I have included some pictures of the area and all the pipes. Any and all help will be appreciated.