Mobile racks, also known as fluent strip racks, are usually evolved from medium beam racks or heavy beam racks. Roller aluminum alloy or sheet metal flow bars are arranged between the front and rear beams of each layer of the rack, and they are placed at a certain slope (about 3o). There are multiple parallel slides, the distance between the slides is adjustable, and the partition rod or partition plate can be set between the adjacent slides to facilitate the guiding of the goods when they slide down.

The goods are usually packaged in paper or placed in plastic turnover boxes, and their own weight is used to realize the flow of goods, easily realize first-in-first-out, manual access and picking, and convenient access. The load capacity of each layer of unit racks is usually less than 1000kg. The effective height of the shelf is generally within 2.5 meters. It is suitable for the process conversion on both sides of the assembly line and the picking operation of the distribution center. It can be equipped with electronic tags to realize the information management of goods. It is widely used in tobacco, medicine, department stores, auto parts and other industries.