Information for Strong-Motion Station
Santa Rosa - 4-story Hospital
CGS - CSMIP Station 68669
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 38.4718 N
Longitude 122.7270 W
Elevation (m) 45
Site Geology Deep alluvium
Vs30 (m/sec) 464 (inferred)
Site Class C
Remarks/Notes Site information sources
No. of Stories above/below ground4/1
Plan ShapeRectangular
Base Dimensions251' x 154'
Typical Floor DimensionsIrregular 251' x 154'
Design Date1987 (HF-840033-49)
Instrumentation13 accelerometers, on 4 levels in the building. 3 accelerometers at a reference free-field site.
Vertical Load Carrying SystemLightweight concrete slab over metal deck supported on steel frames.
Lateral Force Resisting SystemMultiple moment resisting steel frames in upper four stories. Concrete shear walls in the basement Frames are tied together by composite floor diaphragms.
Foundation TypeIsolated and combined spread footings several of which are interconnected by tie-beams.
RemarksThe building was designed according to the 1979 UBC and Titles 22 and 24 of the California Administrative Code. It was instrumented as part of the OSHPD/CSMIP Hospital Instrumentation Project.