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How a design for the Bay bridge, chosen for Aesthetics alone resulted in Problems

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Dr. N. Subramanian
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Joined: 21 Feb 2008
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Location: Gaithersburg, MD, U.S.A.

PostPosted: Mon Nov 28, 2022 6:44 pmPost subject: How a design for the Bay bridge, chosen for Aesthetics alone resulted in Problems Reply with quote

Read how a team of architects and engineers debated on what structure they should choose for the Bay Bridge in California: the more conventional span called a cable-stayed bridge or the novel, self-anchored suspension design. They decided on the self-anchored suspension design against the wishes of most the influential and visionary structural engineers of the 20th century, Tung-Yen (T.Y.) Lin. The design �was chosen on the basis of aesthetics and broader community input without a full appreciation of the complexity of the undertaking and the potential for problems and cost overruns�.

The result is over the years, as challenges mounted and costs soared.
A batch of galvanized rods needed for extra seismic strength on the unusual bridge cracked, adding more than $45 million in costs. A Chinese crane maker won the money-saving contract to make pieces of the bridge, but turned out shoddy welds and produced ill-fitting road decks at risk of premature cracking.


Connecting the self-anchored suspension span to the skyway portion of the bridge turned out to be �the fabrication challenge of a lifetime,� and slowed down the project by a year and added $145 million to the bill.
More at:
https://www.sfgate.com/bayarea/article/Bay-Bridge-s-troubles-How-a-landmark-became-a-6021955.php
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