Back in 2015, contractors and engineers disagreed about the need for the weld access holes now suspected of causing giant cracks in critical support beams, Transbay documents reviewed by NBC Bay Area ...

Transbay terminal officials said Thursday that the weld access holes suspected of triggering cracks in giant steel beams on the $2.2 billion project had passed muster during what they called ...

Transbay Joint Powers Authority says a fabricator's failure to grind a weld access hole led to the brittle fractures of the Fremont Street girders at the Salesforce Transit Center. Fabricator says the ...

Cracks in structural beams forcing the closure of the Salesforce Transit Center originated from where weld access holes were cut into them, a lead investigator said Thursday. The holes were pinpointed ...

SAN FRANCISCO — Defects that occurred during fabrication, along with holes cut into the steel, are likely what caused two structural steel beams to crack just six weeks after the $2.2 billion ...

Nearly three months after a pair of cracked steel beams were discovered at the Pelli Clarke Pelli–designed Transbay Transit Center in San Francisco, crews investigating the structural failures have ...

SAN FRANCISCO — Defects that occurred during fabrication, along with holes cut into the steel, are likely what caused two structural steel beams to crack just six weeks after the $2.2 billion ...