a seismic restraint system for vault located bank safety deposit box modules and the like . this system includes a beam or strongback which extends along the top of a row of safe deposit box modules . a series of adjustable columns bear against the beam and the ceiling of the safe deposit vault . horizontal bars extend laterally from the beam for securement to an adjacent wall or other vertical support . in one embodiment , a rectangular beam assembly with a plurality of adjustable columns is used to secure a freestanding stack of modules . resilient pads and stepped beams accommodate differences in heights of modules .