![]() Morgan Stanley became the building's fourth-largest tenant in 2017. Tourists stand in a glass floored observation deck extending from the 103rd floor of the Willis Tower, formerly the Sears Tower, in Chicago. Other major tenants include the building's namesake Willis Towers Watson and law firms Schiff Hardin and Seyfarth Shaw. As of April 2018, the building's largest tenant is United Airlines, which occupies around 20 floors. Local area residents still refer to the building by its old name. The structure was known as the Sears Tower from its construction until the naming rights were included in a 2009 lease with the Willis Group. The lower half of the tower was originally occupied by retail company Sears, which had its headquarters there until 1994, while the upper stories were rented out. The base of the building contains a retail complex known as the Catalog. The facade is made of anodized aluminum and black glass. The tower has 108 stories as counted by standard methods, though the building's owners count the main roof as 109 and the mechanical penthouse roof as 110. Graham and Khan designed the building as nine square " tubes", clustered in a 3×3 matrix seven of the tubes set back at upper floors. ![]() ![]() The building occupies a site bounded by Franklin Street, Jackson Boulevard, Wacker Drive, and Adams Street. Archived from the original on September 23, 2015. September 1973 49 years ago ( September 1973)ġ04, with 16 double-decker elevators, made by Westinghouse, modernized by Schindler Group and recently remodernized by Otis Elevator CompanyĪon Fire Protection Engineering, formerly Schirmer Engineering Corporation (Fire)
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