Inside, a massive reinforced concrete elevator core carries the weight of the entire structure, allowing the exterior envelope to portray a feeling of delicacy and lightness. Steel spiral stairs cantilever off the core with intermediate landings that provide areas of rest during ascent and descent, as well as views of the site through the semi-transparent envelope. Upon reaching the top, there are two observation decks, an encased platform and an open deck.
On the exterior, the tower is a series of isosceles triangles that, on each level, are rotated six degrees counter-clockwise. This results in an unusual and striking form that creates different perspectives from each angled viewed. The idea of dynamic twisting can be rationalized as an architectural interpretation of wind or motion, as associated with the airport.
The exterior, a white ETFE membrane, allows a certain degree of visual transparency during the day and creates a light tower at night, as different colors burst through the translucent skin. The tower’s spatial impression is the effect of the membrane stretched between the triangular steel frame.
As a parti, the tower is the simple relationship between a round core and spiral stair rotated within the triangular frame of the facade.