this question is based on the st. louis arch video. what is the nickname given to the st. louis arch
Gateway Arch The Gateway Arch is a 630-foot (192Â m) monument in St. Louis, Missouri, United States. Clad in stainless steel and built in the form of a weighted catenary arch,[5] it is the world's tallest arch,[4] the tallest man-made monument in the Western Hemisphere,[6] and Missouri's tallest accessible building. Built as a monument to the westward expansion of the United States,[5] and officially dedicated to "the American people," it is the centerpiece of the Gateway Arch National Park and has become an internationally recognized symbol of St. Louis, as well as a popular tourist destination.
Gateway Arch The structural load is supported by a stressed-skin design.[69] Each leg is embedded in 25,980 short tons (23,570 t) of concrete 44 feet (13 m) thick[58] and 60 feet (18 m) deep.[70] Twenty feet (6.1 m) of the foundation is in bedrock.[70] The arch is resistant to earthquakes[71] and is designed to sway up to 18 inches (46 cm) in either direction,[72] while withstanding winds up to 150 miles per hour (240 km/h).[73] The structure weighs 42,878 short tons (38,898 t), of which concrete composes 25,980 short tons (23,570 t); structural steel interior, 2,157 short tons (1,957 t); and the stainless steel panels that cover the exterior of the arch, 886 short tons (804 t).[61] This amount of stainless steel is the most used in any one project in history.[66][73] The base of each leg at ground level had to have an engineering tolerance of 1⁄64 inch (0.40 mm) or the two legs would not meet at the top.[7]