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Jul 19 2009

St. Louis Gateway Arch

335-st-louis-gateway-arch.jpg

Thanks to all the I'm-Smarter-Than-Everyone-Else-And-The-Rules-Don't-Apply-To-Me-So-_ _ _ _-You people who were visiting the St. Louis Gateway Arch and illegally parking in the completely full Old Cathedral parking lot yesterday, I got the opportunity to walk past the Arch and take some pictures of St. Louis' famous Gateway to the West.

336-st-louis-arch-wrinkles.jpg

The wrinkles in the 1/4 inch exterior stainless steel plates are readily visible and began to appear just months after construction was completed.

337-st-louis-arch-wrinkles-clos.jpg

The inner shell of the Arch is carbon steel, while the outer skin is stainless steel. The stainless steel has a 50% greater coefficient of thermal expansion than the carbon steel. When heated by the sun, the massive panels of stainless steel which were perfectly flat on the ground, buckle predictably, high on the arch. The effect is cosmetic only and does not affect the structural integrity of the 630 foot tall catenary arch.

Posted by Don |

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