are then extended through the bracket holes 29 into the openings 75 so as to fixedly attach the corner piece 17 to the respective shelf bracket 27 the strap 16 is initially positioned on and secured to a respective post 12 the strap is initially slipped over the free end of the post by inserting the post through the strap in the vicinity adjacent the rear wall 48 when the post is positioned adjacent the rear wall the strap can be easily slidably displaced longitudinally along the post until reaching the desired position the strap 16 is then sidewardly displaced relative to the post so as to cause the post to be moved into engagement with the bight 42 as the strap is sidewardly moved relative to the post the pairs of projections 44 on the strap will engage pairs of dimples 32 as formed on opposite sides of the post to effect a securement of the strap to the post since the strap has a split extending through the rear wall thereof this hence provides the strap with sufficient resiliency such that the projections 44 will hence effectively resiliently snap into the dimples 32 so that the strap will hence remain stationarily supported on the post without requiring that.