Information for Strong-Motion Station
Los Angeles - 5-story Hospital
CGS - CSMIP Station 14724
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 33.9232 N
Longitude 118.2426 W
Elevation (m) 27
Site Geology Deep alluvium
Vs30 (m/sec) 274 (inferred)
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground5/1
Plan ShapeRectangular
Base Dimensions184' x 160'
Typical Floor Dimensions184' x 160'
Design Date1993 (OSHPD # HL 909965)
Instrumentation1997. 21 accelerometers, on 5 levels in the building. 3 accelerometers at a reference free-field site.
Vertical Load Carrying SystemConcrete slabs over metal decks (basement 9", 1st floor 7.5", 2nd-5th 6", roof 6" & 7.5", penthouse & high roof 6") supported by steel girders and steel columns on high damping rubber (HDR) isolators.
Lateral Force Resisting SystemPerimeter braced (chevron) and moment resisting steel frames (above the 2nd floor) and concrete shear walls (below the 2nd floor) isolated by 70 HDR bearings and 12 friction dampers (sliders). The HDR bearings are 23" high, 40" in diameter and the design displacement is 20".
Foundation TypeDrilled cast-in-place concrete piles (24" diam., 35' long) in groups of 2 to 15 piles.
RemarksFunding for the building instrumentation was provided by the owner, as required by OSHPD.