Our Rafter Bar (Intermediate) for a Self Support System is used to join and support two polycarbonate sheets - fixing to a wall plate at one end and eaves beam at the other. The bar is extremely robust and can be used with any sheet thickness from 16mm to 35mm supporting spans up to 6 metres.The bar comes in two parts, the sheet is laid in place on the neoprene gasket and the snap cap is pushed down into position. Each bar comes complete with one end cap.