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The 16,000 people who work in and visit Willis Tower each day could soon be spending less time on their elevator rides in Chicago’s tallest building.
A five-year project to upgrade the tower’s 83 elevator shafts — and replace 97 passenger cabs, as some shafts have two-level elevators — will start in June, according to the building’s owner, Blackstone Group’s Equity Office, and elevator firm Otis.
It will be the first major overhaul of the elevators since the 110-story skyscraper was completed in 1974 as Sears Tower.
Utilizing smart technology and energy-efficient components, the upgraded system is expected to reduce trip times by as much as 30 percent and reduce energy use by about 35 percent, Equity Office and Otis said in a news release. Machine rooms, motors, cables and controls will be replaced in the renovation, which will be conducted in stages.
Elevators to the Skydeck tourist attraction, which is visited by more than 1.7 million people each year, are not part of the project.
Blackstone Group bought Willis Tower for a Chicago-record $1.3 billion in 2015. The elevator upgrades are part of a $500 million renovation that will add more than 300,000 square feet of retail and entertainment space at the base of the building at 233 S. Wacker Drive.
Here is the scope of Willis Tower’s elevator system, by the numbers:
1,200
miles
The elevators make more than 42,000 trips per day. Add them all up and they cover about the same distance as a flight from Chicago to Miami.
64
miles
Placed end-to-end, the new cables used in the project would stretch from Chicago to Kenosha, Wis.
5.8
million people
Each year, Willis Tower’s elevators carry about the same number of people as the combined population of Los Angeles and Houston.
1,451
feet
Sears Tower was the world’s tallest building when it opened. It is now the second-tallest in the U.S. and the 15th-tallest in the world.
Sources: Equity Office, Otis and baiduhai reporting
Twitter @ChiTribGraphics
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