The Multi-tier Racking is widely used in situations of high storehouse, many types of goods and small bulks. It is helpful to increase the space usage rate of the location by a design of two-storey loft or three-storey loft. The normal load of a medium loft is 200-300 kg/m 2 , while the normal load of a heavy loft is 400-1200kg/m 2 . The modes of lifting goods normally include human operation, lifting platform, transferring belt and forklift, etc.