San Francisco, CA
China Basin Landing, 185 Berry Street
Scope/Solutions
The client wanted to expand their three-story 300,000 sq ft office building at 185 Berry Street. The existing structure could only accommodate a one-story, 50,000 sq ft vertical addition without further retrofit. By applying base isolation technology, SGH developed an innovative solution that added two stories and 150,000 sq ft to the reinforced concrete structure. China Basin Landing is the first building in the U.S. to have a base-isolated addition on top of an existing building.
The original structure was designed in 1988 to the requirements of the 1984 San Francisco Building Code. Highlights of SGH’s design include the following:
- Specified base isolators at the plane of the existing roof to provide a mass damping effect that reduces the seismic demand in the existing structure eliminating the need for invasive and extensive strengthening in the occupied building
- Developed project-specific design criteria that involved using nonlinear dynamic analytical methods and benchmarking structural performance against laboratory test data, which was subjected to rigorous peer review by the City of San Francisco
- Consulted on building enclosure waterproofing and integration of waterproofing with the structure
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Project Summary
2007
Completion Date
Award
Winner
Solutions
New Construction
Services
Structures | Building Enclosures
Markets
Commercial
Client(s)
McCarthy Cook & Co.
Specialized Capabilities
Building Design | Seismic Engineering | Roofing & Waterproofing
Key team members
Additional Projects
West
140 New Montgomery Street
Completed in the mid-1920s, 140 New Montgomery Street is one of the early skyscrapers built in San Francisco. SGH consulted on the exterior waterproofing and restoration of the facade, which is primarily clad with glazed terra-cotta.
West
Williams-Sonoma at Union Square
Once known as Bullock & Jones men’s clothier, this 18,000 sq ft cast-in-place concrete building was reconstructed after the 1906 San Francisco earthquake. Williams-Sonoma wanted to create a dramatic effect with a new central atrium, which required major modifications to the existing structure.