The mezzanine rack is extensively used in the condition ware house, small goods, manual access ,and large volume of storage. It could utilize the room and save the space of the ware house. According to the actual field and specific requirements, it could be designed as single or multiple loft , generally 2-3 layers. It is specifically used for sorting of automotive components, electronic devices. Medium bearing 100-300kg/layer, Heavy bearing 300-1000kg/layer.The general ways of transportation floor 2nd floor to 3rd floor are:manual, elevating table,hoisting machine, conveying belt, and fork lift track, ect.