Cantilever shelf, mainly used for storing long materials, such as profiles, pipes, plates, wire, pillar using h-beam or cold rolled steel, cantilever with square tube, cold rolled steel or h-beam, cantilever and the pillar type, bolts or plug type connection between the base and pillar between the bolt connection type, cantilever the height is adjustable. Goods are accessed by forklifts, vehicles or by hand. The shelf height is usually within 2.5 meters (up to 6 meters if the goods are retrieved by forklift), the cantilever length is within 1.5 meters, and the load per arm is usually within 500kg. Such shelves are mostly used in machinery manufacturing and building materials supermarkets.