The discovery of cracks in steel beams has prompted the shutdown of the Salesforce Transit Center in San Francisco designed by Pelli Clarke Pelli Architects. The building is an intermodal transit station in downtown San Francisco which serves as the primary bus terminal - and future rail terminal - for the San Francisco Bay Area. The transport hub opened its doors to the public last month.
Transbay Joint Powers Authority (TJPA) decided to close the centre following the discovery of "fissures" in one, then two, of the structure's steel beams.
According to The San Francisco Examiner, TJPA Executive Director Mark Zabaneh said the initial crack is about two ft, six inches long, while the second crack is smaller than the first. Both run along the bottom of the beams, which were made by the Stockton-based Herrick Corp. The centre and the block of Fremont Street passed over by the centre will be closed for least a week initially.
TJPA officials said there could a number of reasons for the cracks in the steel: a fabrication problem, an installation error, too much weight on the beam or an error in the initial design of the building.
The two beams with fissures remain localised to the area above Fremont Street at the Salesforce Transit Center with work on a shoring system beginning in the very near future…