Unlike the Chinese-built deck sections, the bolts - some as long 17 as feet - were produced in the United States.
"It appears to be a type of materials problem - the presence of hydrogen in the metal..."
Wednesday, March 27, 2013
30 huge bolts on San Francisco Bay Bridge have snapped
Unlike the Chinese-built deck sections, the bolts - some as long 17 as feet - were produced in the United States.
"It appears to be a type of materials problem - the presence of hydrogen in the metal..."
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