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
Joshua Sears Building Joshua Sears Building The Joshua Sears Building is a historic building in Kirkland, Washington located at the northwest corner of Market Street and Seventh Avenue, Kirkland's historic commercial core. It is listed on the National Register of Historic Places. It was built in 1891 by Boston philanthropist and capitalist, Joshua Sears, who was heavily invested in Peter Kirk's Great Western Iron and Steel Company and who planned to open a bank in town. As a result of the Panic of 1893, the steel mill and the bank never opened but the Sears building survives today as a reminder of what