Keeping or changing the name of the building was not addressed. MaWillis Tower Watson announces an agreement to combine with Aon plc. No one was in any danger, Willis Tower says. JThe protective layer covering the tower’s glass SkyDeck splinters. MaThe Blackstone Group announces it has signed a deal to buy Willis Tower for $1.3 billion.Ģ016 - Paul Kurzawa, a film executive from the DreamWorks Animation studio, is hired to oversee redevelopment of the tower in an effort to boost tourism.įebruBlackstone Group unveils its plans for $500 million in tower renovations, including revamping the lobby, adding retail and dining spaces and a rooftop garden, among other things. The same month, an attraction called the Ledge opens on the 103rd floor, with glass balconies and a view down 1,353 feet to the street below.Ĭracks develop in the protective coating on a glass sightseeing ledge. July 2009 - The Sears Tower is officially renamed Willis Tower. March 2009 - The owners of the Sears Tower announce that the building will be renamed Willis Tower, after new tenant Willis Group Holdings (Willis Towers Watson as of 2015). The Sears Tower becomes the world’s third-tallest building.ĭecember 1997 - The building is sold to a Canadian real estate firm, TrizecHahn Corp. Structural engineer - Fazlur Khan Timelineġ973 - Construction is completed and the building opens to the public.ġ994 - Sears, Roebuck & Company sells the building to reduce its debt.ġ996 - The Petronas Twin Towers surpass the Sears Tower in height to become the world’s tallest buildings at 1,483 feet each. Weight - 222,500 tons or 445 million poundsīuilding exterior - black aluminum and bronze-tinted glassĪrchitectural firm - Skidmore, Owings & Merrill Lowest level - 43 feet below Franklin St.īuilding size - 4.5 million gross square feet Height of Skydeck/103rd floor - 1,353 feet
Height with the two antennas - 1,730 feet Structural height - 1,450 feet or 110 floors One of the first major buildings to have a sprinkler system.
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