![]() 3 Finish – this finish is obtained with a ground unidirectional 80 to 100–grit abrasive. People often only specify 316 for outdoor projects thinking 304 unsuitable. The Gateway Arch is fabricated from 6.3mm thick grade 304 stainless steel, which shows just how durable 304 can be. The Gateway Arch is the largest stainless steel building in the world. The arch’s width is the same 192 meters as its span. It stands at 192 meters high, which makes it both the tallest arch ever built and the tallest monument built by the United States of America. ![]() “A suitable and permanent public memorial to the men who made possible the western territorial expansion of the United States, particularly President Jefferson, his aides Livingston and Monroe, the great explorers, Lewis and Clark, and the hardy hunters, trappers, frontiersmen and pioneers who contributed to the territorial expansion and development of these United States, and thereby to bring before the public of this and future generations the history of our development and induce familiarity with the patriotic accomplishments of these great builders of our country.”īuilt as a monument to the westward expansion of the United States, the Gateway Arch is the centrepiece of the Jefferson National Expansion Memorial and has become the internationally famous iconic symbol of St. The non-profit making organisation Jefferson National Expansion Memorial Association JNEMA-pronounced “Jenny May” – was set up in 1933 with the following remit:. Louis, MO, USA The Jefferson National Expansion Memorial Association, JNEMA Interior of the arch showing the Observation platform stop off the Gateway arch north tram.
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