Those bad seismic-safety bolts on the new $6.4 billion (with a b) east span of the Bay Bridge were apparently mistakenly tempered twice and made too hard to withstand cracking when exposed to simple rainwater. The Chronicle’s Jaxon Van Derbeken talks to experts who describe a comedy of errors, including one who says, “The bottom line is they used the wrong bolts for this application.” Chronicle
Image: Metropolitan Transportation Commission