seismic stabilization bolts

Caltrans Testing Defective Bay Bridge BoltsThe investigation into busted steel rods on the new Bay Bridge moved to Sacramento Thursday as Caltrans technicians put some of the bolts to the test.
Bolts On Bay Bridge That Haven't Failed May GoTransportation officials say long seismic safety bolts on the new eastern span of the San Francisco-Oakland Bay Bridge that haven't failed may have to be replaced nonetheless.
Seismic Stabilization Bolts Snap On New Bay BridgeDozens of bolts used for seismic stabilization have snapped on the new span of the Bay Bridge. Caltrans told CBS San Francisco what they’re doing to fix the problem.