Railyard 9-inch PlatformRailyard Obstacle Course 9 inch Platforms The Railyard Platform can be used individually to raise a Rail from 9, 18, 27 or 36 inches off the ground. Use to 9 inch Platforms to ramp the Rails to add varying inclines and declines to your workout. Movements up or down on a rounded Rails dynamically changes the muscular involvement and load. Up to four Rails can be placed on each Platform at 90 degrees. Every Platform sits on eight, non marring rubber