Information for Strong-Motion Station
San Francisco - 14-story Gov Office Bldg
CGS - CSMIP Station 58776
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.7810 N
Longitude 122.4177 W
Elevation (m) 21
Site Geology Alluvium over rock (Franciscan)
Vs30 (m/sec) 286 (inferred)
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground14/1
Plan ShapeRectangular
Base Dimensions151 x 408 ft (46.0 x 124.4 m)
Typical Floor Dimensions151 x 408 ft (46.0 x 124.4 m)
Design Date1995
Instrumentation1999. 12 accelerometers, on 4 levels in the building.
Vertical Load Carrying SystemLightweight concrete slabs over metal decks supported on steel beams and columns.
Lateral Force Resisting SystemSteel moment frames in both directions with about 300 viscous dampers. Concrete shear walls are located below the second floor at each damper bay.
Foundation Type5'-6" thick concrete mat foundation.