Conventional shelving system mainly refers to the artificial access for all areas of industrial and commercial storage and retrieval operation of various racking systems, the goods can be directly storing, packaging, storage, container storage and pallet storage way, from the perspective of big industry is divided into the industrial and commercial shelves (mainly for supermarket shelves) two categories; It can be divided into light shelving, medium shelving and heavy shelving according to the layering of shelves. Classified from the perspective of structural characteristics can be divided into the shelf plate rack, heavy duty pallet racking, narrow beams pallet racking, mobile racking, loft-style shelves, steel structure platform, cantilever racking, drawer racking, libraries, unity, etc.; Among them, shelf can be called light shelf, medium shelf, heavy shelf. Conventional shelving is widely used in all walks of life, and a variety of purposes, light duty racking is mainly used for commercial retail, books, electricity, electronic products such as light duty item access and LingCun has, easy to access, artificial access; Heavy shelves are mainly used in various industrial portion of heavy items, and access to warehouse supermarkets and other places of use, storage of goods on pallet or container as a unit, forklift truck operation access, and small lump.