Traversina Footbridge, Viamala, Switzerland

Forming part of a scheme to make the spectacular scenery of this area more accessible, the bridge was designed to be flown in by helicopter. This restricted the maximum transport weight to 4.3 tonnes. The load-bearing system comprises two elements: a lightweight parabolic beam structure, trussed on the underside and with a timber compression chord; and the balustrade beams, consisting...