Patent ID: 8640409

Claim:
A storage apparatus, comprising: a floor panel; a first side panel oriented substantially perpendicular to the floor panel, the first side panel including a first vertical edge; a second side panel oriented substantially perpendicular to the floor panel opposite the first side panel, the second side panel including a second vertical edge; a top panel resting on the first and second side panels opposite the floor panel; a first panel flange extending perpendicularly from the first vertical edge; a second panel flange extending perpendicularly from the second vertical edge; a vertically moveable concrete outer door panel positioned between the first and second side panels; an end panel positioned opposite the outer door panel, wherein the outer door panel is configured to slidably engage the first and second panel flanges; an interior door panel disposed between the first and second side panels, the interior door panel fixed to the first and second side panels, the interior door panel located between the outer door panel and the end panel; a first angle bracket attached to the first side panel adjacent the interior door panel, the first angle bracket including a first bracket flange protruding from the first angle bracket in a plane substantially parallel to the outer door panel; a first flange gap defined between the first bracket flange and the first side flange, the outer door panel vertically moveable in the first flange gap; and a first metal plate embedded in the first side panel adjacent the interior door panel, wherein the first angle bracket is secured to the first metal plate.