The building, designed by Wingårdhs Architects in Stockholm, consists of a hotel with 300 rooms, a restaurant, offices and conference facilities. At around 120 metres high it will be one of the tallest buildings in Sweden.
The programme developed by the Advanced Design Group allowed the designers to test the consequences on the design of different glass and window types, and a number of rules to assemble them to form patterns. Architects and engineers could then quickly evaluate the design impact of their decisions and achieve the effect they wanted with fewer window types and lower cost.
The rules for generating the facades were described through spread sheets, in which the types of windows were also specified. The rules consisted of constrains regarding the total amount of windows for a certain type of glass or a desired distribution of the types of glass in height. More importantly, the rules related the different combinations of transparent and opaque modules, so there were no large areas of one or the other, and then a field effect could be achieved for the whole facade. In general, the program encoded the considerations and constrains though important by the design team at Windgårdhs, and put into code the less specific ideas and rules of thumb developed by them.
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