Heavy Duty Shelving 48W x 18D x 60H With 4 Shelves, Wood Deck, GrayMfr #: B2297543 Expect top performance with rugged steel shelving that features super strong roll formed steel framing with positive interlocking beam and post connections for quick assembly. Top and bottom shelf levels also include double rivet support for added rigidity. This unit includes shelf supports and 5 8" particleboard decking. Levels adjust at 1 1 2" increments and permit 4 way access. 14 gauge steel uprights measure 1 1 2" x 1 1 2".