Patent ID: 6920831

Claim:
A shelf comprising upright columns and first and second horizontally-extending bars having ends connected to the columns and the improvements comprising: the column comprising at least first and second side walls each of the first and second side walls having at least one first hole, a first rib being formed on the side wall adjacent each of the at least one first hole; the first bar being arranged in a first horizontal direction with an end thereof connected to the first side wall of the column, the end of the first bar forming an end tab having at least one first hook formed and sized to fit into a first side wall hole of the at least one the first hole of the first side wall, the first hook comprising a surface having a second rib receivingly engaging the first rib adjacent to the first side wall hole to strengthen a connection between the end of the first bar and the column; the second bar being arranged in a second horizontal direction with an end thereof connected to the second side wall of the column, the end of the second bar forming an end tab having at least one second hook formed and sized to fit into a second side wall hole of the at least one first hole of the second side wall, the second hook comprising a surface having a third rib receivingly engaging the first rib adjacent to the second side wall hole to strengthen a connection between the end of the second bar and the column, the second bar forming a support flange.