String Furniture - Shelf String System - Black - Steel - Designer Nils Strinning; String Furniture Shelf Black Metal. Dimensions: W 58 x D 20 cm - Edge: H 2 cm. An icon of Scandinavian design! The String shelving system was designed in 1949 by the famous Swedish architect Nils Strinning. Completely modular, this shelving system gives you total freedom to customize the look, dimensions and functions of your Bookcase. All components (mounting brackets, shelves, Crates, etc.) are sold separately and are easy to assemble. You choose the number of uprights, the number and length o