A unique exploration into the way designers use the necessary structural elements of a building as a part of its interior design. Steel, glass, concrete, pressure-treated wood: the design work featured in these pages goes deeper than a coat of paint. Edgy, intriguing, and modern, each of these interiors adopts industrial building materials or the physical structure of the building-support beams, heating and ventilation systems, partitions, fenestration-as interior design elements.