Information for Strong-Motion Station
Pasadena - 12-story Office Bldg
CGS - CSMIP Station 24566
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 34.1484 N
Longitude 118.1525 W
Elevation (m) 260
Site Geology Deep alluvium
Vs30 (m/sec) 431 (measured)
Site Class C
Remarks/Notes Site information sources
No. of Stories above/below ground12/0
Plan ShapeIrregular
Base Dimensions238' x 168'
Typical Floor DimensionsOctagonal (Above 5th floor) 118' x 118'
Design Date1971
Instrumentation1989. 15 accelerometers, on 4 levels in the building.
Vertical Load Carrying System3" concrete over metal decks supported on steel frames.
Lateral Force Resisting SystemMoment resisting steel frames: two frames are provided for resisting lateral loads in the N-S direction. To resist lateral forces in the E-W direction 3 frames exist for the direction 3 frames exist for the first 4 stories and 2 frames are provided for the upper 8 stories.
Foundation TypeSpread footings with pedestals supporting each column. R/C Grade beams are provided along the column lines of the moment resisting frames.