Abstract: A rectangular grating panel to be supported in a stationary frame surrounding an opening of a storm drain inlet or the like, the grating panel having an outwardly projecting anchor leg at one side to project beneath one of the frame members of the stationary frame and having a pair of adjustable locking devices projecting from the opposite side of the grating panel to bear against an interlock beneath a confronting frame member of the stationary frame. The locking devices each include a threaded stud adjustable by threaded nuts for axial movement relative to the grating panel and a truncated angle member head on each stud providing a face to bear against the confronting frame member and a short flange to project therebeneath.