The K2 office building is located opposite of the Tower of London in the St. Katharine Docks area. A glass façade 32 metres high and 27 metres wide encloses the entrance area facing the street at the western end of the building. The roof over this entrance area is also glazed, as is the atrium roof, which spans half the length of the building. Each of the façade glass panels, made of laminated safety glass (2 x 12 mm tempered safety glass) and measuring up to 3.7 m x 2.0 m, is supported by four point fixings which are clamped to pairs of pre-tensioned cables using stainless steel cast components. The pre-tensioning forces in the cables provide adequate rigidity for the façade. A steel structure made of tubular steel and welded box sections serves to anchor the cables and absorb the pre-tensioning forces. Most of the elements of the steel structure were joined using bolts and eyebars in the method frequently used in England to create articulated joints. The roof glazing comprises triple-glazing units measuring up to 3.3 x 2.0 m. Each unit is supported by six point fixings. These are fixed to the roof using stainless steel cast components.