Independent outdoor shelf String® System accommodates both a small balcony and a larger terrace. The shelf is completely independent but, if desired, can be attached to the base on which it rests. A complete section of the shelf comprises a separate rear panel (SBP-11-1), two uprights (SU-11-1) and two floor panels galvanized 85 cm high and 30 cm deep. To build additional sections, you need a strut along with a panel for each section. We recommend to the least one rear panel, preferably placed in the center, for an independent shelf formed by three sections.