Open back commercial shelving doesn't have a back and this gives quick access to stored items out of either side of the unit. These storage shelving models have a steel structure and this supports the cabinets. The gauge of metallic used to construct the shelving dictates the strength a particular device will be able to support. Boxes and crates that have to be looking forward to quick access are usually stored upon open back shelving built from industrial strength steel measure. Open back commercial and industrial shelving is a very great saver of horizontal space as the units are often taller than their width. In offices smaller material shelving units are used to retail outlet stationery and heavy cases of documents.