Talk:Cypress Street Viaduct/Archive 1

Archive 1

Untitled

tried to add a link to http://www.youtube.com/watch?v=lMnXZiw3hJk which is a 1950s video showing the viaduct being constructed, also shows design flaws which would eventually lead to it's collapse in 1989. the bot kept removing the link, so maybe someone else can add it for me instead. ive seen links to youtube videos on many other wikipedia articles, so i dont know why i cant add to this one. —Preceding unsigned comment added by Derek20la (talk • contribs) 00:31, 6 July 2009 (UTC)

Unverified/NPR Information

I would love to see verification of this story: The concrete forms for the structure were not adequately constructed, causing the spans between the support pillars to sag. Anyone traveling over the upper deck of the structure up until the mid 70's would experience a pronounced hopping motion as the vehicle traveled up and down the spans. I have personally experienced this. Legend has it that the design engineer was so depressed about the design error that he committed suicide. In the mid 70's, Caltrans added fill material to the spans and repaved them to even out the pavement.

I also have some personal questions about the structure and repair. Was the added weight of the material, and it must have been very substantial, a contributing factor to the failure during the earthquake? I have driven on the bottom deck, sometimes several times a day prior to the earthquake. I noticed large cracks between the supporting pillars and the upper deck, at exactly the same place where the upper deck failed. These cracks were there for years before the earthquake. Was Caltrans ever held accountable for ignoring these cracks? — Preceding unsigned comment added by Grumpyoldgeek (talk • contribs) 18:01, 1 November 2011 (UTC)

Suggested Reading

Collapse of the Cypress Street Viaduct

This is a journal about the Collapse of the Cypress streetnviaduct. The journal does not provide much information about this tragidy but the book it suggest has a lot of information on thid topic. The abstract summary reads as follows "This paper is being presented by the Division of Structures, Post EarthQuake Investigation Team (PEQIT) on the collapse of the Cypress Street Viaduct in the City of Oakland, California, as a result of the October 17, 1989, Loma Prieta Earthquake. It will briefly discuss the design criteria, pioneering characteristics of the design, construction techniques, and the lifeline importance of the structure. Discussion will highlight the structural components, foundations, geotechnical features, and the subsequent seismic retrofit of the structure. The local effect of the Loma Prieta earthquake with respect to the Cypress Structure, summaries of eyewitness accounts, the structures failure mechanisms, and the unusual failure characteristics will be presented." Antshep (talk) 20:09, 16 February 2012 (UTC)

Reference

ISBN 0872628213

ISBN 9780872628212 — Preceding unsigned comment added by Antshep (talk • contribs) 20:41, 16 February 2012 (UTC)

Was a memorial marker included somewhere?

I knew about Mandela Parkway. But Street View didn't show any marker. Will (Talk - contribs) 19:01, 31 May 2015 (UTC)