Hoops are also called arches or ribs. It is the curved piece of rectangular tubing making up the primary frame or skeleton of the structure. Available in 1×2″ or 1×2″ size. Structures have a pair of hoops that connect at the ride. The Hanley caterpillar tunnel has 1-piece hoops, and the modified Hanley has 2 pieces, which connect with a bracket.
