when did construction start on the twin towers
Construction of the World Trade Center Construction work began on the North Tower in August 1968 with construction beginning on the South Tower by January 1969.[137] In January 1967, $74 million in contracts were awarded to the Pacific Car and Foundry Company, Laclede Steel Company, Granite City Steel Company, and Karl Koch Erecting Company to supply steel for the project.[138] The Port Authority chose to use many different steel suppliers, bidding on smaller portions of steel, rather than buy larger amounts from a single source such as Bethlehem Steel or U.S. Steel as a cost-saving measure.[139] Karl Koch was also hired to do all the work of erecting the steel, and a contract for work on the aluminum facade was awarded to the Aluminum Company of America.[138] Tishman Realty & Construction was hired in February 1967 to oversee construction of the project.[140]
Lunch atop a Skyscraper Formerly attributed to "unknown", it has been credited to Charles C. Ebbets since 2003[4][5] and erroneously to Lewis Hine. The Corbis corporation officially returned its status to unknown although sources continue to credit Ebbets.[6][7][8][9]
Grenfell Tower fire Construction, by contractors A E Symes of Leyton, under the council housing system, ran from 1972 to 1974.[28][29] The 67.30-metre (220 ft 10 in) tall building contained 120 one- and two-bedroom flats.[30][31] The upper 20 of 24 storeys had six dwellings and 10 bedrooms each. The lower four storeys were used for non-residential purposes. Later, two floors were converted to residential use, bringing the total to 129 apartments, housing up to 600 people.
Alonso Álvarez de Pineda