An exhibition opens this week that celebrates one of the unsung heroes of 20th century design: the structural engineer. The show, titled Unseen Hands: 100 Years of Structural Engineering, will be at the V&A museum in London until September as part of the Institution of Structural Engineers’ 100th anniversary celebrations.

Sarah Buck, IStructE’s president, says: “Generally, galleries focus on aesthetics, but this exhibition is very definitely about the principles and techniques that make world-class structures actually work.” Unseen Hands is a mix of photographs, models, original drawings and videos centred around three themes: building high, enclosing space and spanning voids. Here’s a sneak preview …