Information for Strong-Motion Station
Walnut Creek - 10-story Commercial Bldg
CGS - CSMIP Station 58364
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.9069 N
Longitude 122.0661 W
Elevation (m) 53
Site Geology Rock (sedimentary)
Vs30 (m/sec) 326 (inferred)
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground10/0
Plan ShapeRectangular with appendage at first floor only
Base Dimensions104'-2" x 148'-2" (56'-1" x 58'-2" appendage)
Typical Floor Dimensions104'-2" x 148'-2"
Design Date1970
Instrumentation1979. 16 accelerometers, on 4 levels in the building.
Vertical Load Carrying System2-3/4" lightweight concrete over 2-3/4" precast panel slab supported by precast, prestressed concrete beams and concrete columns.
Lateral Force Resisting SystemInterior core concrete shear wall and exterior precast and cast-in-place concrete frame.
Foundation TypeSpread footings and caissons