Is to more than double the space for the utilization of a combination of design, in the case of limited plant floor space, can be used for three-dimensional planning, efficient use of space. In simple terms, is the use of steel beams and sheet metal storage area for the original floor segment, each floor can be placed on different kinds of shelves, while the upper floor has a support shelf structure effect. Is a commonly used enterprise storage shelf varieties. Its platform constructed within the maximum expansion of the warehouse, storage spaces, and can be used in combination with conventional shelf, make efficient use of warehouse space for the greatest degree. Its characteristics are: 1. To improve the storage height, increase space utilization. 2. Only the top lightweight goods store, is not suitable for heavy transport equipment to walk. 3. transported to the top of the article of vertical transportation equipment must be installed. 4. Suitable for all types of goods storage. 5. Storage type: lower - pallets. Top - boxes, bags, bulk goods. 6. Removable assembly.