SFMOMA Expansion

Since originally constructed two decades ago, Langan has been providing engineering services for the San Francisco Museum of Modern Art (SFMOMA). The recent $610-million expansion called for a 10-story, steel structure addition to the 5-story building and a 30-foot-deep excavation next to neighboring towers. The southern portion of the expansion required the installation of a new foundation system, while the northern portion rests on the existing foundations. Challenges included control of anticipated differential settlement between the existing and new foundations, spreading new building loads to prevent over-stressing of the existing mat foundation, temporary support of adjacent structures during excavation for the new basement, and variable subsurface conditions (including weak layers that required ground improvement) within the new expansion limits.
2016 ASCE San Francisco, Top Geotechnical Project
2016 ENR California Best Projects, Cultural/Worship Best Project
2017 ENR National Best of the Best Cultural/Worship Project