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The St. Louis Gateway Arch

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The St. Louis Gateway Arch

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The St. Louis Gateway Arch

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  1. The St. Louis Gateway Arch

  2. Facts and Figures about the St. Louis Gateway Arch: •Height: 630 feet •Width at the base: 630 feet •Weight: 43,000 tons •Exterior composition: Stainless steel •When it was built: February 12, 1963 -October 28, 1965 •Depth of the foundation: 60 feet •Architect: Eero Saarinen •Location: In the Jefferson National Expansion Memorial, 11 North Fourth Street, St. Louis, Missouri, on the banks of the Mississippi River •Time it takes to travel in the tram to the observation deck at the top of the arch: About 4 minutes (it travels at a rate of 240 feet per minute) •Number of steps in each leg of the arch (the stairs are used only for maintenance and emergencies: 1,076 •Gateway Arch is the nation's tallest monument

  3. THE MAIN PEOPLE 1. LUTHER ELY SMITH 2. MAYOR DICKMANN 3. EERO SAARINEN

  4. JNEM • Jefferson National Expansion Memorial • St. Louis leveled 14 blocks of downtown space to make way for the new monument and park

  5. DESIGN OF ARCH: CATENARY CURVE The classic catenary curve sways 1/2" - 1" in 20 mph wind.

  6. ARCH CONSTRUCTION • The Arch consists of 143 triangular parts made of stainless steel • The segments are biggest near the ground and eventually get smaller

  7. ARCH CONSTRUCTION • Arch legs had to be built simultaneously so as to be perfectly inline • Portable cranes were also developed to lift the segments to their towering heights

  8. Creepers • Creepers were used to build each leg. • Creepers were used because there were no cranes tall enough to build the legs.

  9. ARCH CONSTRUCTION • At 500ft, A truss had to be used to hold up the legs of the Arch

  10. THE END