Structurally, the tower has been engineered with a composite concrete core with steel outriggers anchoring the eight super-columns. Seven double layer belt trusses located at mechanical and refuge floors comprise the exterior in conjunction with the super diagonals at the corners of the tower. The eleven floors of the podium are constructed in a typical steel frame method. Nonlinear dynamic time history seismic analysis performed by structural engineers Thornton Thomasetti played a critical role in the performance-based structural design of the tower.