One of the most amazing tourist’s sights that has to be seen to fully appreciate is the Gateway Arch in St. Louis Missouri. At 630 feet high it is the tallest monument in the United States. The Washington Monument, though quite impressive is only 555 feet in height. Equally a great sight to enjoy, the San Jacinto Monument in Texas doesn’t quite match it either at only 570 feet.
Image via Wikipedia
In 1947 St. Louis held a design competition to see whose design would be selected and built. 147 applicants entered the competition. The winner was Eero Saarinen an American/Finnish architect who had won some acclaim for his ability to successfully vary his style when the project demanded it.
Hannskarl Bandel was the structural engineer who took Saarinen’s design and made changes that were necessary so that the design could actually be built. Bandel is recognized as the one who altered the inverted catenary shape so that it would work once actually built. Saarinen attempted to achieve a certain “soaring” effect that made the design appear slightly stretched. Bandel took the chain Saarinen had been using, went away and returned several days later having constructed the exact curve to the arc the architect had been after.
The structure began on February 12, 1963 and took two years to complete, finishing in October of 1965. The completed structure was as wide as it was tall at 630 feet becoming the tallest structure to hold people in Missouri. Bandel had added weight to the first 300 feet of the structure placing over 25,000 tons of concrete into the arch’s foundation. This shifted the center of gravity down making the structure much more stable than it otherwise would have been. But in the end he had brought into physical being the elegant and impressive design dreamed up by Saarinen, and creating one of the marvels in Western World.




