The transit hub was shut down in September after workers found cracks in steel support beams.
RELATED: Preliminary findings released into what caused cracks in beams in Salesforce Transit Center building
The Transbay Joint Powers Authority says repair and reinforcement work to fix the beams are underway.
You'll want to avoid the area this Saturday and Sunday. There will be a one block full closure of First Street between Howard and Mission streets.
TIMELINE: A look at the Salesforce Transit Center closure in San Francisco
There is still no word on when the center might reopen. Repairs are scheduled to be complete by the first week of June.