Abstract: A heavy duty garage shelf assembly having shelf brackets that may be easily moved up or down and adjusted in place. The assembly is comprised of two steel vertical support tubes that are each bolted to a wall by a clamp at the top and a shoe-clamp at the bottom; and a number of shelf brackets. The shelf-brackets are made of steel tubing welded to form a cantilevered right triangle, with the base of the triangle being a tube that fits over the vertical support tubes and can slide up and down. The shelves are 0.75 in. thick in 1 in. thick wood plywood and are bolted to the shelf brackets. The garage shelf assembly, when using 11/2 inch diameter vertical support tubes, is capable of supporting up to 200 pounds total load on its shelves. For heavier loads, larger diameter vertical support tubes of 1.75 inch or 2 inches diameter should be used. The shelves can be extended in length by the addition of a vertical support tube and shelf brackets a distance apart at either end of the assembly.