The Field Act: Protecting California's Schools
Transcript of The Field Act: Protecting California's Schools
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The Field Act: Protecting California’s Schools
from Seismic Hazards
Timothy DawsonEngineering Geologist
California Geological Survey, Menlo Park
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Xinjian Primary SchoolKindergarten (left) and Hotel (right) survived with little damage
Du Bin for the New York Times
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Newport – Inglewood fault zone
1933 Long Beach Earthquake
• Occurred March 10, 1933, 5:54 PM (timing is everything)
• M 6.4
• 120 fatalities• 120 schools in Long Beach area, 70 destroyed
• $50M (1933 dollars)
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Long Beach Polytechnic High School, Long Beach
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Alexander Hamilton Junior High School, Long Beach
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Jefferson Junior High School : Worst of the worst?
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Compton School
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Compton School. Note rain of bricks at the entrance
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Stanford School, Long Beach: A reinforced concrete seismic survivor
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Franklin Junior High School, Long Beach
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AFTERMATH 1933 - Enactment of the Field Act. Enacted as an on April 10, 1933 one month after the earthquake.
1939 - Enactment of the Garrison Act. Enacted in order to protect public school children in structures built before 1933. However, school districts not required to make necessary inspections.
1967 to Present - Various amendments. Schools required to make necessary inspections and retrofitting or abandonment of unsafe structures.
Geologic investigations required in Alquist-Priolo Zones.
Many other modifications….
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Provisions of the Field Act
• Authorizes the State Architect to develop state-wide building code.
• Division of the State Architect (DSA) given authority to approve or reject plans for construction of new schools and alterations to existing buildings.
• California-licensed architect or structural engineer responsible for preparation of plans.
• DSA reviews plans and issues certificate of compliance once project is approved.
• Violation of the provision of the Act is a felony.
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CGS Role in the Field ActUnder contract to DSA to review geotechnical and geological aspects of school sites
Surface fault rupture LiquefactionLandslides
Seismic Design(Ground motion)
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http://www.conservation.ca.gov/cgs/News/Documents/1933_EQ_poster.pdf
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Weblinks to photo sources are in the notes window(Click “View” and “Notes page” in main Powerpoint Menu
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Juyuan Middle School