Port of San Francisco Ferry Building

The retrofit of this historic structure started in early 1997. Since the building is occupied, much of the construction work had to be done during night hours and on Saturdays. Several areas were damaged by the Loma Prieta earthquake. Renovation required the preservation of historical structural parts, which were integrated with new construction. Vintage steel was analyzed for weld-ability to new steel. Some cast iron structures were located, but no welding was performed onto cast iron. Major strengthening measures including adding heavily reinforced shotcrete shear walls to the structure.