Coupling system and construction including same

A shelving system comprising:

• a plurality of support posts;
• at least one tab coupler mounted on each support post such that each tab coupler faces at least one equi-leveled tab coupler mounted on a neighboring support post;
• and
• a plurality of socket couplers each fitted at respective opposite ends of support beams, said tab coupler comprising at least one locking tab extending from a locking face along a locking axis and configured with a round T-like sectioned shape, said socket coupler comprising at least one U-shaped locking socket projecting from a mounting face of the socket coupler along a coupler axis and configured with a U-shaped tab arresting groove;
• the shelving system is configurable between an unlocked position whereat the locking socket slidingly receives the locking tab so that the locking axis and the coupler axis coincide, and a locked position upon rotating one of the tab coupler and the socket coupler about the coinciding axes, entailing snugly arresting of the locking tab by the locking socket, preventing sliding displacement and axial displacement along the coinciding axes and defining a support surface on the support beams.