Adjustable rail mounting assembly

An adjustable mounting assembly comprising, in combination, a slotted upright support post, a slotted, substantially horizontal mounting rail for attachment to said post and support of storage containers thereon, and attaching means for removably securing said mounting rail to said post, said attaching means comprising an adjustable locking bracket for insertion through said slotted mounting rail and through said slotted upright support post, said slotted post including equally spaced vertical slots of equal dimension, said rail including a vertical slot and a plurality of vertically spaced holes aligned with the slot, said bracket including a vertical member having three laterally extending fingers thereon with the upper and lower fingers being hook-shaped to extend through the rail and post and interlock therewith to secure the rail to the post, the dimensions and spacing of the post slots, slot and holes in the rail and the fingers on the bracket being such that the rail can be attached to the post in adjusted position fractionally of the vertical distance between the post slots as well as adjusted positions coinciding with the vertical distance between the post slots.