November 20, 2022
Featured Story Willis Tower Antenna Replacement
Project date: November 20, 2022 When Installation Services, Inc. (ISI) in Chicago needed to replace a worn out communications antenna atop one of the country’s tallest skyscrapers, the Willis Tower (formerly Sears Tower), ISI contracted the Siller team and its Sikorsky S-64E Skycrane. Siller was to disengage the defective unit into two pieces, lift it...
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