Investigators for San Francisco’s Transbay Joint Powers Authority are searching for the cause of brittle fractures in the tapered bottom flanges of twin 80-ft-long built-up plate girders in San Francisco’s Salesforce Transit Center.
Gov. Jerry Brown (D) in late September vetoed a bill that would have directed California municipalities to create a database of structures that would be at risk of collapse as a result of seismic events.
The Transbay Joint Powers Authority, after closing its recently dedicated Salesforce Transit Center, is investigating the cause of cracked built-up plate girders supporting the roof garden.
The 58-story Millennium Tower in the Transbay district of San Francisco, which has sunk 18 in. and is tilting 2 in., is under even more scrutiny for possible structural defects since a window on the 36th floor cracked.