Abstract: Rack arrangement designed for installation in, for example, a warehouse or a factory for storage of loads. A pair of stationary racks having a plurality of vertically and/or laterally partitioned storage spaces are arranged in spaced parallel relation. A movable rack or racks having a plurality of similarly partitioned storage spaces are arranged between the two stationary racks, with a working space defined between the facades of any selected pair of adjacent racks. A rail is mounted on the top of each stationary rack and supported thereon. A girder supported and guided by the pair of rails is movable along the length of the rails. A load transfer unit is supported and guided by the girder for movement within the working space. The load transfer unit includes a take-in/take-out device which is up-and-down movable within the transfer unit, able to support a load, and is retractably movable relative to a storage space for delivery of the load to and from the storage space.