A furniture assembly system including: a horizontal member; a vertical member arranged to cross said horizontal member as viewed in a plan view; a cross axis extending in an axial direction; a binding element to bind the horizontal member to the vertical member along the cross axis. The horizontal member crosses the vertical member at a crossover interface where the horizontal member is keyed to the vertical member at a keying interface adjacent the crossover interface to limit circumferential rotation therebetween about the cross axis.

A furniture assembly system including: a horizontal member; a vertical member arranged to cross said horizontal member as viewed in a plan view; a cross axis extending in an axial direction; a binding element to bind the horizontal member to the vertical member along the cross axis. The horizontal member crosses the vertical member at a crossover interface where the horizontal member is keyed to the vertical member at a keying interface adjacent the crossover interface to limit circumferential rotation therebetween about the cross axis.