The Otis Elevator Company test tower in Bristol, Connecticut is 117 meters tall and allows the company to develop and test all of its elevators and components. The facility has a quality control and product testing lab, along with 13 test elevator shafts.
The Bristol facility has three high elevator shafts, four mid-level, and six low ones to accommodate for the differences in elevator sizes around the world. They have the capabilities to test a range of systems that are needed for elevators, including cables, belts, and hydraulic systems.
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via The Courant