With glazing of Kew Gardens' new £600,000 Alpine glasshouse almost complete, there is strikingly little structure to see. Structural engineer Dewhurst Macfarlane has clipped glazing panels to highly tensioned cables. Two inclined arches form the spine of the 18m long, 9m high, by 10m wide building, and a pair of horizontal arches describe the glass house's perimeter. Upper ends of the cables are tied to the vertical arches. The cables support the horizontal arches, and are anchored into the building's reinforced concrete foundations. Contractor is Killby & Gayford.