Abstract: A multiple depth storage structure includes tilted, parallel rail assemblies in a storage bay. A first, single depth rail of each assembly is rollably mounted on a second, double depth rail, which is rollably mounted on a third, triple depth, fixed rail. Outer rail assemblies, having an upper outer rail rollably mounted on a lower outer rail, may be located outwardly adjacent each rail assembly. A first load is placed on cross supports joining the upper outer rails, if so equipped. Loads are successively accepted on the first rails, forward depth of the second rails, and forward depth of the third rails. Successive loads push back previous loads, and removal of each load causes positioning of the remaining loads and the rails for facile removal of a previous load or acceptance of a next load.

Abstract: Means for installing, adjusting and securing tracks of a gravity feed mechandise rack. Preferably, a strip bearing slots is spaced slightly above the horizontal support surface of each of the front and rear cross members of a shelf for the rack. Each track has a pair of cooperating side rails, preferably with in-turned lower edges. During assembly, each end of a track slides into slots while the in-turned edges slide between a strip and a support surface. The sizes of the tracks, strips and slots are such that the tracks may be placed into a locked position by simple longitudinal manipulation.