San Francisco, CA
499 Illinois Street
Scope/Solutions
The 499 Illinois Street project in Mission Bay is a 500,000 sq ft biotechnology center in two buildings with laboratory, office, retail, and parking. SGH provided structural and building enclosure engineering services for the project that consists of two five-story buildings over two levels of parking with flanking retail and office spaces at grade level.
Highlights of SGH’s work for this project include the following:
- Developed an innovative foundation system incorporating steel H-piles set in an auger-cast secant wall that integrates grouts of two different strength and functions as a shoring wall, a permanent foundation wall, a below-grade groundwater cutoff wall, and a waterproofing barrier
- Incorporated a seismic force resisting system with buckling-restrained braces and composite concrete-encased steel columns designed using nonlinear response-history analysis
- Designed floors to limit walking-induced vibration to 2,000 micro-inches per second
- Designed a mat foundation that was placed in a continuous fourteen hour effort that involved an 11,000 cu yd, monolithic placement of concrete to minimize potential for water intrusion and reduce construction cost
- Designed and observed waterproofing installation below-grade, raised plaza, balconies and roofs
- Provided performance criteria and third-party commissioning for design-build curtain walls
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Project Summary
2008
Completion Date
500K
Project Size
Solutions
New Construction
Services
Building Enclosures | Structures
Markets
Commercial
Client(s)
DGA planning | architecture | interiors
Specialized Capabilities
Building Design | Temporary Construction | Geotechnical | Commissioning | Facades & Glazing | Roofing & Waterproofing
Key team members
Additional Projects
West
1100 Broadway
SGH was the structural engineer for the adaptive reuse and new construction project totaling 310,000 sq ft of office and 10,000 sq ft of ground-floor retail space.
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.