Abstract: A shelf, attachable to upwardly oriented mounting members on upright members, is comprised of a top surface and a bottom surface, the top surface being generally rectangular and generally planar and having front, back, left and a right sides. The shelf is further comprised of a front lip and back lip, both extending downward from the front and back side of the top surface, respectively. A left and right lip extend downward from the left and right side of the top surface, respectively. The left and right lips each include two or more pairs of openings dimensioned to receive mounting members, and each opening in the pair is aligned vertically with the other opening. The front, back, left, and right lips are integrally connected to the top surface. The shelf is formed from a unitary sheet of metal.