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Window cleaner. Window cleaning, or window washing, is the exterior cleaning of architectural glass used for structural, lighting, or decorative purposes. It can be done manually, using a variety of tools for cleaning and access. Technology is also employed and increasingly, automation. Commercial work is contracted variously from in-person ...
Early skyscrapers. The earliest stage of skyscraper design encompasses buildings built between 1884 and 1945, predominantly in the American cities of New York and Chicago. Cities in the United States were traditionally made up of low-rise buildings, but significant economic growth after the American Civil War and increasingly intensive use of ...
A skyscraper is a tall continuously habitable building having multiple floors. Modern sources define skyscrapers as being at least 100 meters (330 ft) [1] or 150 meters (490 ft) [2] in height, though there is no universally accepted definition, other than being very tall high-rise buildings.
List of tallest buildings in Houston. Houston, the largest city in Texas, is the site of 97 completed skyscrapers over 427 feet (130 m), 50 of which stand taller than 492 feet (150 m). [1] [2] [3] The tallest building in the city is the JPMorgan Chase Tower, which rises 1,002 feet (305 m) in Downtown Houston and was completed in 1982.
The first high-rise hotel and casino resort to rise higher than 492 feet (150 m) was the 529-foot (161 m) New York-New York Hotel & Casino, completed in 1997. Las Vegas entered into a skyscraper-building boom in the late 1990s that has continued to the present; of the city's 40 tallest skyscrapers, 39 were completed after 1997.
The Pioneer Building, whose observation tower surpassed 110 feet (34 m), was completed in 1892 and is regarded as the city's first modern high-rise building. [10] [11] The Alaska Building , completed in 1904 and rising 203 feet (62 m) above 2nd Avenue in Pioneer Square , is considered to be Seattle's first skyscraper and first steel-framed high ...
Sprinkler heads operate individually. Note the red liquid in the glass bulb. A fire sprinkler system is an active fire protection method, consisting of a water supply system providing adequate pressure and flowrate to a water distribution piping system, to which fire sprinklers are connected. Although initially used only in factories and large ...
The Tower at PNC Plaza is a 33-story skyscraper in Pittsburgh, Pennsylvania. It is the corporate headquarters of the PNC Financial Services Group and has approximately 800,000 square feet (74,000 m 2 ), standing 33 stories (545 feet) tall. [2] [3] Nearby buildings totaling 37,000 square feet (3,400 m 2 ), were purchased by PNC and deconstructed ...
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