A shelving case assembly (10) includes two or more rows of shelving cases (12), certain of which are movable to enable access to both front row cases and those behind for storing or retrieving information modules (14). Movable cases include rollers (38) on a bottom panel that have constrained movement along a pedestal channel (42) and upper guide means (44) maintaining upright relation to immovable cases (32). A cover plate (76) is held securely in place on a floor surface by a pedestal (40).