Sears Tower, Chicago, Illinois, USA
Inspection, testing of the fire alarm system of the building.
As part of yearly requirements, a systematic inspection and testing of the fire alarm system of the building.? A long and tedious process for the 110-story 412.7 meters (1,459 feet) high building, including the mechanical portions.? Even though, the building was designed in late sixties, it was completed in 1973.? Today, the building is known as the Willis Tower.