This type shelves usually by beam type shelves evolution and into, shelves each layer before and after beam Zhijian set wheel type aluminum or sheet metal gold flow force article, is must slope (3 º around) placed, using goods weight, achieved goods of advanced first out, access convenient; for assembly line sides of processes conversion, and distribution center of chose job, places; can distribution to electronic label, achieved goods of information management; unit shelves each layer contains weight usually in 1000kg within, shelves height in 2.5 meters within.