Information for Strong-Motion Station
San Francisco - 6-story Hospital
CGS - CSMIP Station 58718
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.7825 N
Longitude 122.4429 W
Elevation (m) 59
Site Geology Weathered rock (serpentine/shale)
Vs30 (m/sec) 436 (inferred)
Site Class C
Remarks/Notes Site information sources
No. of Stories above/below ground6/0
Plan ShapeIrregular
Base Dimensions300' x 85'
Typical Floor Dimensions300' x 85'
Design Date1990
Instrumentation1995. 18 accelerometers, on 5 levels in the building.
Vertical Load Carrying SystemIn lower five stories lightweight concrete flat slab is supported by concrete shear walls, spandrel beams and columns with drop panels. In roof light-weight concrete over metal deck is supported by steel frames.
Lateral Force Resisting SystemDistributed concrete shear walls in lower five stories, and braced steel frames in the sixth story. Nine-story elevator tower has steel braced frames in upper five stories.
Foundation TypeConcrete shear walls are supported on 24" diameter drilled concrete piles. Interior columns are supported on isolated spread footings interconnected by tie beams.
RemarksBuilding was designed in accordance with 1979 UBC and Titles 22 and 24 of the California Administrative Code (OSHPD Project # HF-820015-38). It was instrumented as part of the OSHPD/CSMIP Hospital Instrumentation Project.