The airside building's challenging roof geometry affects the facade, which is inclined at 12infinity off vertical.
Geometrically it is like a section from the base of a cone, says Falter, which means there are no parallel lines.
Instead of cutting each pane of glass to fit an odd-shaped hole it has been possible to accommodate rectangular panes within the tight 5mm construction tolerance.
However, mullions are of varying length.
Glazing has been hung from cantilevers that project from the front and back of the airside building. Bearings at the facade's lower edge accommodate movement in the facade itself as well as the rest of the structure. To withstand fairly high wind loading of 1.53kN/m 2, mullions are 850mm deep.
Swiss contractor Geilinger has carried out glazing with subcontractor Tobler.