Information for Strong-Motion Station
Rancho Cucamonga - 4-story Justice Cntr
CGS - CSMIP Station 23497
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 34.1044 N
Longitude 117.5739 W
Elevation (m) 364
Site Geology Deep alluvium over hard rock (granitic)
Vs30 (m/sec) - -
Site Class C
Remarks Site information sources
No. of Stories above/below ground4/1
Plan ShapeRectangular
Base Dimensions414' x 110'
Typical Floor DimensionsSame as base dimensions
Design Date1983
Instrumentation1985. 16 accelerometers, on 4 levels in the building. 3 accelerometers at a reference free-field site.
Vertical Load Carrying SystemConcrete slabs over steel decks supported on steel beams and columns, on natural rubber bearings.
Lateral Force Resisting SystemBraced steel frames isolated by laminated steel and rubber bearings.
Foundation TypeSpread footings
RemarksThis is the first building built on base isolators in California.