Abstract: A knockdown storage bin shelving system having horizontal crossbars joined to vertical posts to provide a spacial interstices that form shelves for storage bins. The front and back horizontal crossbars are connected by slide rails and the horizontal crossbars and slide rails form load bearing shelves on which the storage bins are stored. The horizontal crossbars are placed at a height providing an opening in which storage bins are placed. The horizontal crossbars are placed through holes in the interior vertical posts and are connected to the outer vertical posts. The vertical posts have the largest diameter, the horizontal crossbars are smaller in diameter than the vertical posts, and the slide rails are smaller in diameter than the horizontal crossbars. The slide rails are rigidly connected to the horizontal crossbars. The horizontal crossbars are placed through holes in the interior posts until they are stopped by a dimple. The dimple insures precise placement of the interior post.