The closely spaced interior and exterior columns are tied at each floor with deep spandrel beams. At the truss levels, these tubes are tied together. • These ties resulted in a stiffer structure, as the building acts as a unified system of stiffened tubes. • The interaction between the individual tubes and the belt trusses at mechanical levels allows the building to attain its extreme height. • Due to the drop offs, the gravity loading on the system is not evenly distributed along the height of the building. • These trusses take the gravity loads from above and redistribute them evenly onto the tubes below. • This is particularly important for the uppermost section of the tower, due to its asymmetry about the central axis of the building. • The presence of the belt trusses help to mitigate these effects of differential settlement, which cause the building to tilt. Spandrel beams are load-bearing structural members around the perimeter of a floor of a building. Not only may they support loads from the roof and other floors, they may also help support a building's walls. For example, walls expected to experience significant forces from wind may be anchored to these beams to better distribute the load