Abstract: A stackable set of tray carrying units is disclosed wherein each unit has a floor member and a ceiling member. Each of the floor and ceiling members has downwardly extending feet, and the ceiling member also has upwardly extending split posts. The floor and ceiling members are connected together by vertical beams having upper and lower I-beam extensions which frictionally engage with the respective feet of the ceiling and floor members. The stacking arrangement is such that each of the split posts of the ceiling member is sized to frictionally fit within one of the feet of a floor member assembled on top of the ceiling member, with the web of the lower I-beam extension of a beam in an upper one of such units having an interference fit with the space defined by the split post of a lower one of such units.

Abstract: A rolling drawer is disclosed having a drawer-like tray and at least one pair of wheel assemblies mounted on either side of the tray without the use of separate fasteners, tools and the like. The tray has a bottom panel and a pair of upstanding side panels connected to the side edges of the bottom panel. At least one cut-out opening is formed in the bottom panel along each of its side edges, and each side panel has an open ended slot communicating with a respective one of the cut-out openings and projecting upwardly therefrom. Each wheel assembly includes a bracket member having an elongated plate wider than the width dimension of the open ended slots and a pair of oppositely disposed L-shaped mounting lugs on the inner surface of the plate.