Do You Install Sliding Closet Doors On Floor Or Rug How To Mount Closet Door Track To Concrete Floor?

How to mount closet door track to concrete floor? - do you install sliding closet doors on floor or rug

I will be a series of sliding closet doors mirror must be installed on a concrete floor. I find the installation instructions, but I remember something in them to bring a piece of wood under the lower path, so that the carpet go under the tracks (the track has less weight because they reflect) the doors.

Has anyone done or have recommendations on how to do?

Thank you,
AJ