Information for Strong-Motion Station
San Francisco - 62-story Resid. Bldg
CGS - CSMIP Station 58389
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.7858 N
Longitude 122.3921 W
Elevation (m) --
Site Geology Rock (sedimentary)
Vs30 (m/sec) - -
Site Class B
Remarks Site information sources
No. of Stories above/below ground62/0
Plan ShapeRectangular
Base Dimensions137 ft x 113 ft
Typical Floor Dimensions102 ft x 113 ft
Design Date2006
Instrumentation2012, 72 accelerometers on 26 levels.
Vertical Load Carrying SystemPost-tensioned concrete flat slabs supported by concrete columns and core shear walls.
Lateral Force Resisting SystemConcrete core shear walls with supplemental tall outrigger columns of steel reinforced concrete in the transverse direction. The core is attached to outrigger columns by steel buckling restrained braces. Water tanks at the top of the building are part of the "tuned liquid-mass damper" system to reduce wind induced motions.
Foundation TypeConcrete mat foundation (12 feet beneath the tower) bearing on bedrock.
RemarksThis building was instrumented jointly by the California Geological Survey and the U.S. Geological Survey. The building structural design was based on performance-based seismic design.