Burj Khalifa with Smith's attempts to make the crown more slender. The building opened on 4 January 2010. The tower was designed by Skidmore, Owings and Merrill (SOM), which also designed the Willis Tower (formerly the Sears Tower) in Chicago and the One World Trade Center in New York City. Burj Khalifa uses the bundled tube design of the Willis Tower, invented by Fazlur Rahman Khan. Due to its tubular system, proportionally only half the amount of steel was used in the construction, compared to the Empire State Building. Khan's contributions to the design of tall buildings have had a profound impact
The Buckingham (Chicago) floor of the building for a total of 306 units. An indoor pool, sauna, laundry room, fitness center and open roof deck are located on the top floor. The Buckingham has 3 high-speed elevators that run the length of the building plus one elevator that runs from the first floor to each floor of the 4-story underground parking garage. The Buckingham is east of 340 on the Park. It appears (unlabelled) in front of Park Tower (Chicago) in the diagram below. The Buckingham (Chicago) The Buckingham, formerly known as Buckingham Plaza, is a 44-story all-residential condominium designed by Fujikawa Johnson