A seismic shelf restraint for use with a shelf structure of a type having a shelf and two front columns on opposite sides of the front ledge of the shelf with each front column having a mounting slot positioned higher than the shelf surface and facing the same direction as the other mounting slot. The seismic shelf restraint preferably is an elongated thin flat bar with two tabs, one at each end, which are seatable in the mounting slots of the two front columns so that the rigid body is wholly positioned alongside the front ledge, for restraining objects from falling from the front ledge.
I. FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.