Abstract: A safety deposit box storage structure comprising: a housing formed from continuous metal sheet, the housing having a back wall and spaced apart side walls. At least one inwardly projecting ridge extends along the inner surface of each side wall. A top wall and a bottom wall are secured to the housing to form a box structure having an open front end. At least one vertical partition is disposed between and parallel to the side walls; the vertical partition being generally flat, and having at least one corrugation formed therein. Each corrugation has a ridge projecting from each side of the partition. A plurality of spaced-apart slots are formed in the ridges. The slots are generally parallel to the top and bottom wall: A plurality of horizontal shelves are provided having lateral edges dimensioned to be received in the slots, the vertical partitions and horizontal shelves defining compartments within the box structure to receive a security box.