Medium-sized shelves belong to a type of storage shelf, shelf shelf type. Medium-sized shelves are distinguished and named according to the carrying capacity of the shelves. According to this division principle, medium-sized shelves are between light angle steel shelves and heavy-duty beam shelves, so they are named medium-sized shelves. Usually the medium-sized shelf load is: 150~500KG/layer.
　　Scope of application of medium-sized shelves: medium-sized shelves are strong and strong, with large bearing capacity, and are widely used in shopping malls, supermarkets, enterprise warehouses and institutions.　　Material:
　　Medium-sized shelves are mainly composed of columns, beams, pallets and shelves, the main features are connection, assembly, disassembly is simple (only need a rubber hammer can be assembled / disassembled), beautiful appearance, suitable for manual access to goods, bearing capacity is usually 200KG-400KG / layer, can meet most of the use requirements. The main component of the medium-sized shelf is made of cold plate sheet gold, which can be freely adjusted up and down according to the 50mm spacing, in order to facilitate the operator to access the goods, the total height of the shelf usually does not exceed 2 meters, if the use of ascending equipment, the shelf height can reach up to 3 meters. Can be used alone or freely spliced into various arrangements. Medium-sized shelves are combined design, disassembly and transportation are very convenient, and shifting and moving save time and effort, and have the irreplaceable advantages of traditional welded shelves. Medium-sized shelf products are subjected to strict room temperature bearing tests.　　structure
　　1. Medium-sized shelf column is formed by cold-rolled steel plate by special cold-forming unit, the front of the shelf column is punched with double row holes, the hole distance is arranged in a straight line at a distance of 50mm, and the shelf column hole is used to hang the beam; The two shelf columns are opposite each other, and there are transverse connecting pipes and inclined connecting pipes in the middle to assemble the two shelf columns into the column pieces of the shelf.　　2. The medium-sized shelf beam adopts "P" shaped pipe, commonly known as "step beam", and the height of the step matches the height of the medium-sized shelf shelf.
　　3. The medium-sized shelf steel shelf plate adopts cold-rolled steel plate, and the four-sided one-time full-page bending is formed according to the required size.
　　4. The medium-sized shelf beam and the shelf column sheet are mounted and assembled into the shelf frame, and finally the steel shelf is laid, so that a complete set of medium-sized shelves is formed.
　　5. After the components of the medium-sized shelf are processed and formed, all are polished, pickled, phosphating, automatic powder electrostatic spraying, drying and other processes and assembled after the finished products. The finished surface of the medium-sized shelf is smooth and beautiful.
　　6. The height of the medium-sized shelf layer can be adjusted arbitrarily with a minimum pitch of 50mm, which is convenient for disassembly and assembly.
　　Medium-sized shelf production process: processing→ grinding→ pickling→ phosphating→ automatic powder electrostatic spraying→ drying
　　Medium shelf main and secondary rack description
　　Medium-sized shelves are assembled from columns, beams, shelves, and independent groups have two columns, such shelves are called main shelves.
　　If several groups are assembled into a column, then in addition to the first group that needs two columns, the others can share a column with the group in front of it, and such a shelf is called a secondary shelf. This saves space and reduces costs.