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The Gateway Arch During a nationwide competition in 1947-48 architect Eero Saarinens design a 630-foot stainless steel arch which was chosen as a perfect monument to be built in St Louis MO Construction of the Arch began in 1963 and was completed on October 28 1965 for a total cost of less than 15 million My paper is going to tell us about the construction of the Gateway Arch the materials and techniques used to build it unique tram system also some of the code precautions that would be taken today The stainless-steel-faced Arch spans 630 ft between the outer faces of its triangular legs at ground level It soars an amazing 630 ft into the sky It takes the shape of an inverted catenary curve 4030-403101 this would comply as a high rise buildingEach leg is an equilateral triangle with sides 54 ft long at ground level tapering to 17 ft at the top Each leg has double walls of steel 3 ft apart at ground level and 7-34 in apart above the 400-foot level Up to the 300-foot mark the space between the walls is filled with reinforced concrete Beyond that point steel stiffeners are used Doherty 33 The double-walled triangular sections were placed one on top of another and then welded inside and out to build the legs of the Arch Sections ranged in height from 12 ft at the base to 8 ft for the two keystone sections A Monument to a Dream Film The complex engineering design and construction is completely hidden from view All that can be seen is its sparkling stainless steel outside skin and inner skin of carbon steel which combine to carry the gravity and wind loads to the ground The Arch has no real structural skeleton Its inner and outer steel skins are joined to form a composite
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