Information for Strong-Motion Station
Riverside - 13-story Govt Office Bldg
CGS - CSMIP Station 13312
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 33.9779 N
Longitude 117.3729 W
Elevation (m) 259
Site Geology Deep alluvium over rock (granitic)
Vs30 (m/sec) 418 (measured)
Site Class C
Remarks Site information sources
No. of Stories above/below ground13/1
Plan ShapeRectangular
Base Dimensions208' x 135'-4"
Typical Floor Dimensions174'-3" x 99'-9"
Design Date1972
Instrumentation1977. 15 accelerometers, on 4 levels in the building.
Vertical Load Carrying SystemMain Building: exterior concrete wall and interior steel frame to 3rd floor; steel frame from 3rd floor to roof. (13-story, 174' x 100'). Service Tower: exterior concrete wall to 7th floor; braced frame from 7th floor to roof. (14-story, 52' x 37')
Lateral Force Resisting SystemMain Building: Steel moment frames.
Foundation Type--