To sufficiently clean the outside of the windows on the upper floors of skyscrapers without automated equipment, window washers need to suspend themselves from what is called a boatswain’s chair. The chair is supported from davits located on the building’s roof. Scaffolding ramps can also be suspended from the roof davits. Window washers sit in the chair or stand on the scaffold with buckets or other containers of window cleaner and water. They scrub the window with the cleaner and squeegee the window to remove dirt and water.
Manually washing windows on a skyscraper this way is inherently dangerous. The number one most cited safety violation in 2010, according to OSHA statistics, is scaffolding. There are over 700 deaths per year on the job from falls in general with 3-10 window washer deaths.
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