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By June 15, 2011, One World Trade Center had reached the 70th floor, the glass facade installation had reached the 45th floor, and concrete flooring had been installed up to the 63rd. [47] On August 1, 2011, concrete workers and carpenters at the tower walked off the job one month after their labor contract had expired.
The structural plan drawings show the foundation, floor, and roof plan of the building. These plans provide information like size and location of the structural elements present in the respective plans. Elevations show the exterior walls of a building or structure. In elevation drawings you can find the height of building (floors and roof ...
The columns at the perimeter of the foundations are supported on spread footings measuring as much as 14 by 14 feet (4.3 by 4.3 m) across and 9 feet (2.7 m) thick. The perimeter walls themselves are up to 53 feet (16 m) tall and are composed of concrete with a strength of 10,000 pounds per square inch (69,000 kPa). [28]
A slurry wall is a civil engineering technique used to build reinforced concrete walls in areas of soft earth close to open water, or with a high groundwater table. [1] This technique is typically used to build diaphragm (water-blocking) walls surrounding tunnels and open cuts, and to lay foundations .
[86] He also incorporated other features of Arabic architecture into the building design, including pointed arches, interweaving tracery of prefabricated concrete, a minaret like flight tower, and arabesque patterns. [87] The World Trade Center design brought criticism of its aesthetics from the American Institute of Architects and other groups.
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Core-and-veneer, brick and rubble, wall and rubble, ashlar and rubble, and emplekton all refer to a building technique where two parallel walls are constructed and the core between them is filled with rubble or other infill, creating one thick wall. [1] Originally, and in later poorly constructed walls, the rubble was not consolidated.
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