Formby Helical Stair was the winner in the Small Projects category at the Structural Awards 2016. The ceremony was held on 11th November 2016 at The Brewery.
The judges commented “(we) were amazed by the grace and audacity of this post-tensioned stone stair that twists through space from floor to floor. The engineer has fully understood and exploited the limited tensile capacity of stone by augmenting it with just enough steel to form a wonderful hybrid.”
The post tensioned stone staircase turns through 320° without any intermediate support and the treads are profiled to be slender at the edges and thicker at the centre where the cables are located. Read more about the project here.