Crews working through the night at San Francisco’s now-closed Salesforce Transit Center found no additional cracks after two were found in steel beams earlier this week, officials with the Transbay Joint Powers Authority said.
Overnight, crews assessed and tested the steel beams in preparation for shoring up the area, which could happen as early as this weekend.
Also in preparation for the shoring, crews removed ceiling panels, moved light fixtures and utilities and are relocating some overhead systems for San Francisco Municipal Railway electric buses, according to TJPA officials.
The first crack was discovered in a steel beam on the third-level bus deck above Fremont Street on Tuesday by workers installing ceiling panels. The discovery caused TJPA officials to abruptly close the $2.2 billion facility and as well as the portion of Fremont Street located directly below the bus deck, between Howard and Mission streets.
As engineers were inspecting the first crack, about 2 feet 6 inches long, they found a second, smaller one on a parallel steel beam, which also runs across Fremont Street.
The beams support the third-level roof and bus deck as well as the fourth-story park above.
On Wednesday, TJPA Executive Director Mark Zabaneh said engineers were still attempting to figure out what may have caused the crack. They’re looking into whether the cracks are related to the beams’ fabrication, their installation or the center’s design.
The beams were installed during construction in 2016 and have not been inspected since, which Zabaneh said, is standard protocol.
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