The building is organized in three vertical levels. Atop a first-floor parking garage, a spacious middle floor contains the terminal’s administrative and operational areas, including ticketing, customs, immigration, restaurants, shopping, and waiting areas. The steel beams that span the ceiling add a weighty feeling to the space that contrasts sharply with the feel of the observation deck, which has the sensation of being made of a light, flexible, and easily malleable plane. Connecting the three levels are a series of gently sloping ramps, which the architects decided were more effective than stairs at maintaining a continuous and multi-dimensional flow of circulation.