http://www.californiabeat.org/2009/09/05/breaking-structural-flaw-may-delay-bay-bridge-reopening Sun, 03 Mar 2013 20:56:23 +0000 hourly 1 http://wordpress.org/?v=3.4.2 http://www.californiabeat.org/2009/09/05/breaking-structural-flaw-may-delay-bay-bridge-reopening/comment-page-1#comment-266 Jamie Clark Tue, 15 Sep 2009 13:51:56 +0000 http://californiabeat.wordpress.com/?p=3796#comment-266 Although I'm not an expert in bridge inspections, I am certified to inspect metallic/mechanical structures. With out reading the repair scope for this "linear indication - not crack", as we all know only a metalurgist can call an indication a "Crack", I see a lot of questions not being asked from the public. 1.) If the crack is being "saddled", aka scab patched, did they grind out the crack...to keep from propergating beyond the "saddle" aka temporary repair? 2.) If the crack can truly be seen from +100ft., and was not observed during an inspection 2yrs. prior, what caused such an adverse change? Industrial practices prove that stress cracks (which in my opinion this is) form over time and the amount of posed stress. What type of inspection was performed to ensure the crack was not through wall? So, with this being a stress crack, please have the "Inspectors" (not public spokesperson) answer question number 1, and answer me this: What non-destructive testing was performed, after observing known cracks, on all other load/stress bearing joints? Although I’m not an expert in bridge inspections, I am certified to inspect metallic/mechanical structures. With out reading the repair scope for this “linear indication – not crack”, as we all know only a metalurgist can call an indication a “Crack”, I see a lot of questions not being asked from the public.
1.) If the crack is being “saddled”, aka scab patched, did they grind out the crack…to keep from propergating beyond the “saddle” aka temporary repair?
2.) If the crack can truly be seen from +100ft., and was not observed during an inspection 2yrs. prior, what caused such an adverse change? Industrial practices prove that stress cracks (which in my opinion this is) form over time and the amount of posed stress. What type of inspection was performed to ensure the crack was not through wall? So, with this being a stress crack, please have the “Inspectors” (not public spokesperson) answer question number 1, and answer me this: What non-destructive testing was performed, after observing known cracks, on all other load/stress bearing joints?

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