Retractable Booth - Willis Skydeck
At the top of the tallest building in the Western Hemisphere is the Willis Tower observation deck, called the Skydeck. Located on the 103rd floor of the tower, it is 1,353 feet (412 m) high and is one of the most famous tourist attractions in Chicago, with some 1.3 million tourists visiting annually. The Skydeck dates back to 1974 and was renovated in 2009. These renovations included the unique all-glass boxes, informally dubbed "The Ledge", that allow visitors to look through the glass floor to the street 1,353 feet (412 m) below. The boxes, which can bear 5 short tons (4.5 metric tons) of weight, are retractable and can be extended approximately 4 feet (1.2 m) from the façade.
MTH Industries, a Chicago glazing and structural steel firm established over 200 years ago, sought out Serapid’s unique technology to realize this project. Serapid provided 5 LinearBeam actuators, ceiling-mounted, to provide the absolutely safe and reliable push-pull motion to allow the boxes to be retracted into the building for maintenance. Download project sheet
Video courtesy of Skydeck
Willis Tower Observation Deck - the "Skydeck" or the "Ledge"
Architects: Skidmore, Owings & Merrill
Main Contractor: MTH Industries
Linear Motion by Serapid
Read about this project in The New York Times
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