The 48'x 48' Baltic Birch Flex Spring Floor features 2"x4" oil tempered springs which attach with an innovative plastic cap. The 48' x 48' spring floor consist of a bottom layer of 5' x 5' x 9mm Baltic Birch plywood panels, each with 25 springs and overlaid with another layer of 5'x 5'x 9mm Baltic Birch panels. The top layer is staggered over the bottom layer by 2.5' and held together with our unique hook and loop connectors at the edges and center of each panel. The perimeter is bolted together to keep the floor square and prevent the panels from sliding apart as on other birch floor systems. The Baltic Birch Flex Spring Floor is a strong flexible resilient system. The 5' x 5' panels and hook and loop connectors make set up fast and easy; making it popular for cheer gyms and cheer competitions. Requires 7 rolls of carpet bonded foam or Flexcell Foam and Flex Carpet, as well as BF border foam. By GMR developed the first 2"x4" Elite Spring in 1986 and revolutionized spring floors. Equal to the Palmer Power Spring Floor. Must be shipped motor freight. Please use the quote button to request motor freight charges.