Patent attributes
A shelf assembly includes four vertical posts each having vertically spaced first engaging holes and vertically spaced second engaging holes. Each of two horizontal beams includes a first board. Each end of each horizontal beam includes a third engaging groove and a first buckle having a first coupling groove. Each of two connecting beams includes a second board. Each end of the second board includes a second buckle having a second coupling groove. A support board is mounted on top of the horizontal beams and the connecting beams. Each first buckle engages one of the first engaging holes. Each second buckle extends through one of the third engaging holes and one of the second engaging holes. Each first coupling groove engages a bottom edge of one of the first engaging holes. Each second coupling groove securely receives a corresponding connecting wall and the first board of a corresponding horizontal beam.
