Transbay Transit Center in San Francisco: Cracked Beams

Like with what happened at the Silver Spring Transit Center or on the second phase of the Metrorail Silver Line--both had problems with structural integrity of concrete, there are structural problems with at least two structural beams at the new Transbay Transit Center in San Francisco, which will require adding temporary supports while figuring out in more detail the nature of the problem.  In the interim, buses are staging at a different location.

The San Francisco Chronicle has a visual essay about it, "What we know about the Transbay Transit Center's cracked beams," which is interesting mostly for the video it shows of the interior and the bus bays.  Quite attractive.

One of the noteworthy elements of the project is a rooftop park. It's closed too ("SF transit center’s rooftop park closure a tough blow for nearby neighbors").