Tennsco Snap-together open shelving add-on unit Snap-Together Open Shelving Add-On Unit, Sand, 36w x 76h with 6 Shelves Save 50% of the floor space used by conventional files! For highly active files and records. Each Starter Set and Add-On Unit includes adjustable 12" deep shelves, shelf supports, and five file dividers per shelf. Heavy-duty rolled steel construction. 200- to 300-lb. load capacity per shelf (with weight evenly distributed). Assembly required.