Vintage Alignment Systems

If this is not too much of a digression, can I ask if turning plates can work just sitting on a level concrete floor? I think they are typically designed to fit on a drive-on rack. I'm thinking about buying some but am concerned that the base might slide on the concrete and turn with the wheels if not hemmed in by the drive-on rack.

25-140 Quality Passenger Mild Steel Turnplates - Red