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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 ...
Portland, the largest city in the U.S. state of Oregon, is the site of 31 completed high-rises at least 250 feet (76 m), four of which stand taller than 492 feet (150 m). [1] [2] [3] The tallest building in the city is the Wells Fargo Center, which rises 546 feet (166 m) in Downtown Portland and was completed in 1972. [4] The second-tallest skyscraper in the city is the U.S. Bancorp Tower ...
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. Historically, the term first referred to buildings with between 10 and 20 stories when these types of ...
This is a list of the tallest buildings. Tall buildings, such as skyscrapers, are intended here as enclosed structures with continuously occupiable floors and a height of at least 350 metres (1,150 ft). Such definition excludes non-building structures, such as towers .
Boston's history of skyscrapers began with the completion in 1893 of the 13-story Ames Building, which is considered the city's first high-rise. [5] Boston went through a major building boom in the 1960s and 1970s, resulting in the construction of over 20 skyscrapers, including 200 Clarendon and the Prudential Tower. The city is the site of 25 skyscrapers that rise at least 492 feet (150 m) in ...
The curtain wall cost $28,000 more compared to normal sash windows, while the double glazing cost $135,000 and the window-washing equipment cost $50,000. However, the air conditioning system resulted in $90,000 of upfront savings, $3,600 per year in energy savings, and $1,000 per year in savings from reduced air "leakage".
A glazier is a tradesperson responsible for cutting, installing, and removing glass (and materials used as substitutes for glass, such as some plastics ). [1] They also refer to blueprints to figure out the size, shape, and location of the glass in the building. They may have to consider the type and size of scaffolding they need to stand on to ...
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