Mezzanine rack takes medium-duty or heavy-duty rack as the main part, to use solid steel plate or solid steel checkered plate or perforated plate as the flooring. Single-tier or multi-tier mezzanine can be designed, normally it is 2 or 3 tiers. Stairs, lift platform, hoist, conveyer belt or forklift are used to take goods upstairs. Generally, the load capacity of multi-tier mezzanine is 300kg-1,000kg/sqm. It is widely used for tall warehouses with small goods which is operated manually. Mezzanine can make best use of the warehouse space. It is widely applied to auto parts, 4S stores, light industry and electronics industry.