Construction designers and managers inspecting the Salesforce Transit Center have found a second cracked steel beam after crews on Tuesday morning first discovered a different steel beam on the east side of the center.
Both beams run parallel to each other and support the third-floor bus deck and the 5.4-acre rooftop park. Construction crews found the crack on the first beam while installing ceiling tiles and saw the crack through the fire proofing material on the beam.
Mark Zabaneh, who serves as the executive director of the Transbay Joint Powers Authority, said the extent of the second beam is not as severe as the first beam but still shows a crack in it
The closure of the transit center and Fremont Street between Howard and Mission streets will remain closed until at least next week.
Zabaneh said the main construction contractor Webcor/Obyashi and structural engineers will do an exhaustive inspection of other parts of the transit center with a similar design.
Preliminary results showed so far that the center portion of the transit center has no issues with its steel beams, which has a similar design to the east side of the transit center, said Zabaneh:
“At this point, all indications that this is localized on Fremont Street.”
Zabaneh said engineers will look at the fabrication, design of transit center and installation of the steel beams to determine the main cause of fissures on the beam.
Zabaneh added that the cracked steel beams have nothing to do with the issues involving with the Millennium Tower or with the issues of the gravel on the rooftop park.
Engineers and contractors will now have to develop a plan to relieve the stress of the two cracked steel beams to other parts of the transit center so that Fremont Street can reopen and buses possibly could resume service on the bus deck.
Commuters who use AC Transit, Muni and WestCAT will have to continue to board buses at the temporary Transbay Terminal at Howard and Main streets.
Golden Gate Transit said passengers should board its buses at Mission and First streets and at Main and Folsom streets.
Mayor London Breed said in a statement said she had visited the transit center with officials with the TJPA to discuss the ongoing investigation:
“We must have a thorough and transparent investigation to determine the causes, severity, and impacts of this discovery, as well as a plan to re-open the Transit Center as soon as it is safe to do so.”
“The Transbay Transit Center is too important for our City and our regional transportation system not to act quickly to have definitive answers for the public, and someone needs to be held accountable once the cause is determined.”