Abstract: Open frame shelving includes upright posts including corner posts and center posts, single-depth and double-depth shelves, horizontal shelf supports and backstops. The corner posts have open, box-like, transverse cross sections with rectangular vertically spaced slots in the end walls thereof and with tapered, vertically spaced slots in the spaced inner walls thereof. Each shelf support has tabs at the opposite ends thereof projecting perpendicular to the axis and engageable in the tapered slots of the corner posts. Backstops extend parallel to the shelf supports and have tabs at their opposite ends engageable in the rectangular slots in the corner posts or in similar slots in the center posts. Single-depth shelves are supported between a shelf support and a backstop, and double-depth shelves are supported between two shelf supports, and may be provided with a reinforcing bar extending between the shelf supports.

Abstract: A one piece adhesive extension tab for forming a cantilevered extension along one edge of a folder. The tab includes an elongated planar member defined by first and second longitudinal edges, first and second lateral edges, and first and second surfaces extending between the edges. A fold line runs parallel to the first and second longitudinal edges to divide the elongated planar member into first and second longitudinal sides. The planar member is foldable along the fold line to form the tab. A visual alignment mechanism is formed on the planar member for facilitating straight and uniform positioning of the tab on the edge of the folder by aligning with the edge of the folder. The visual alignment mechanism includes an opening for viewing the edge of the folder, and a longitudinal line extending from the opening and parallel to the fold line for aligning with the folder edge viewed through the opening. A third longitudinal edge of the planar sheet also aligns with the folder edge.