The hexagonal shape is inspired by the light-weight molecular structures exhibiting high strength to weight ratios. The form tapers and expands in order to optimize the structural performance and programmatic needs. Two hexagonal shapes are used to create a hexagonal truss. Housing and offices spaces are allocated within the hexagons - while the majority of the services are accommodated in the bridging service beams. A circulation system with elevators, high-speed funiculars, escalators and elevated walkways provide quick transportation through the city. A glass skin consisting of solar cells together with wind farms properly allocated in the 3dimentional shape of the building are used to generate the majority of the electrical needs for the city. Hexa City is designed with great spatial flexibility, allowing property versatility and adaptation to the quickly changing demands of the market.