The design principle of the drive-in rack is to connect several rows of standard racks and have a dedicated pathway. Installation can be two sets of drive-in racks installed back-to-back or one single set against the wall. Forklifts use the same in-out channel. When storing products, start inwards towards outwards and when retrieving should be the opposite. Storage density is very good, but not suited for FIFO. It is suitable for periodic batch operations and high frequency loading and unloading raw material warehouses or distribution centers.