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Steel plates to reinforce cracked beams under Transit Center repair plan

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The Salesforce Transit Center sits empty after the discovery of a second cracked steel beam on Wednesday, Sept. 26, 2018. (Kevin N. Hume/S.F. Examiner)

Plans have been approved to repair fractured beams at the temporarily shuttered Salesforce Transit Center by reinforcing them with steel plates, Transbay Joint Powers Authority officials said Friday.

The repair plans were reviewed and approved last month by a peer review panel of the Metropolitan Transportation Commission, which is also developing recommendations guiding additional inspections at the center prior. No date has been set for the center to reopen.

The $2.2 billion bus terminal with a rooftop park located in downtown San Francisco was first closed in September after workers discovered two fissures in steel beams on the bus deck above Fremont Street.

A preliminary investigation linked the cause of the fractured structural beams forcing the center’s closure to weld access holes that were thermally cut into them. Plans for repair include reinforcing four beams — the two cracked beams on Fremont Street and two non-impacted beams on First Street — with four thick steel cover plates.

Four sets of the plates will be bolted together above and below the fractured areas of the beams for protection. A construction schedule to repair the beams is expected to be finalized in January 2019.

The peer review committee is expected to update the board of the Transbay Joint Powers Authority, which operates the center, on the process that informed the center’s original design and any changes made during construction at a hearing next week.

lwaxmann@sfexaminer.com

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