Alameda Point – Buildings 9 and 91

When the Naval Air Station closed in 1997, the US Navy transferred over 500 acres to the City of Alameda. Most of Alameda Point has since been placed on the National Register of Historic Places and this area is now one of California’s largest historic districts. Buildings 9 and 91 are the first to be readapted for reuse. Langan conducted a subsurface investigation at Alameda Point. Selecting appropriate foundations for planned improvements at both buildings was critical given the presence of liquefiable soil and weak, highly compressible Bay Mud. Langan recommended a micropile foundation design to support a new mezzanine within the 96,000-SF steel-framed Building 9, which is supported on composite concrete and timber piles with a slab-on-grade floor that had settled several inches over time. The 51,000-SF Building 91, which is a wood-framed warehouse supported on spread footings, was strengthened to resist seismic loads with new shear walls or moment frames.

American Society of Civil Engineers – San Francisco Section, Architectural Engineering Project of the Year, 2019

Alameda Architectural Preservation Awards 2018 - Building 91; 2019 - Building 9