The building plan consists of 9 squares, each 75 feet across, placed in a three- by-three grid arrangement. • Each square has 5 columns per side spaced 15 feet on centers, with adjacent squares sharing columns. • As the columns rise up the building, each square in the plan forms a tube, which can be seen on the exterior of the building. • These tubes are independently strong but are further strengthened by the interactions between each other through truss connections. • While the tubes connect at each floor level with beams and floors trusses, several large trussed levels act as the main horizontal connectors in the buildings. • These trussed levels, which also contain the mechanical systems for the building, appear as black horizontal bands on the façade. While the louvres covering the trussed levels mask the structural details, the purpose of these levels remains abundantly clear visually.