Tensegrity is an idea developed by Buckminster Fuller, which describes designs that are held together entirely by tensile behaviour. Weller’s design uses string under tension to hold together the elements, which do not even need to touch. He was inspired by a sculpture that he saw in Arnhem, the Netherlands and developed it for a three-legged stool in which the timber elements are held in position by a special kind of string that is fixed to be under tension.
Following advice from Sean Sutcliffe at Benchmark, Weller used a marine rigging called Dyneema which does not creep (stretch under continued loading). The rigging is actually tightened with a pulley system. The rigging makes the appearance complex, and so Weller deliberately kept the other elements as simple as possible – a disk for the seat of the stool, and circular legs with rounded ends that are deliberately evocative of broomsticks.