Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E....
Transcript of Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E....
![Page 1: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/1.jpg)
Earthquake Risk and the Workplace
David Bonowitz, S.E.Chair, SEAONC Existing Buildings Committee
Commission on Health and Safety and Workers’ CompensationCatastrophe Preparedness Conference
April 7, 2006
![Page 2: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/2.jpg)
Issues How can we enhance worker safety?What have past earthquakes taught us?What do engineers know that we don’t?
Earthquake losses Your perspective vs. the building code’s Four open secrets
![Page 3: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/3.jpg)
EQ losses: What’s at risk? Life safety Building and contents Business continuity Public services Tax base Community resilience Neighborhood character & history Good will
![Page 4: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/4.jpg)
1. No code for existing buildings Upgrades sometimes triggered
Change of occupancy Major renovation
Otherwise up to owner, tenants Exceptions
Hospitals (SB 1953) Unreinforced masonry (SB 547)
![Page 5: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/5.jpg)
Vulnerable structure types Unreinforced masonry Tilt-ups Unbraced cripple walls Hillside houses Soft story apartments (and HOGs) Non-ductile concrete frames Parking structures (precast concrete)
![Page 6: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/6.jpg)
Unreinforced masonry1994
20031989
![Page 7: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/7.jpg)
6800 in 1990 60% mitigated Remaining risk
Life safety Housing Building value Small business Neighborhood
character, history
URM in the Bay Area
![Page 8: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/8.jpg)
Tilt-ups Evolving code
since 1971 Significant
damage in 1994 Thousands in
Bay Area No mandatory
retrofit
![Page 9: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/9.jpg)
Tilt-ups Remaining risk
Building value Contents value Business
continuity 1994
![Page 10: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/10.jpg)
Non-ductile concrete frames Pre-1976
inventory not quantified
All occupancies Hard to spot
from street Complex and
expensive to retrofit 1971
![Page 11: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/11.jpg)
Non-ductile concrete frames: 1994
![Page 12: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/12.jpg)
Non-ductile concrete frames Remaining risk
Life safety Building value Business
continuity Emergency
response Tax base Good will
![Page 13: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/13.jpg)
2. Nonstructural hazards count Often overlooked in construction Sometimes life-threatening
Falling hazards Egress Hazardous materials Fire
Often more costly and disruptive
![Page 14: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/14.jpg)
Nonstructural hazards Precast panels Ceilings Shelves/equip Hazmat
1964
![Page 15: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/15.jpg)
Nonstructural hazards Precast panels Ceilings Shelves/equip Hazmat
2005
![Page 16: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/16.jpg)
Nonstructural hazards Precast panels Ceilings Shelves/equip Hazmat
2001
![Page 17: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/17.jpg)
Nonstructural hazards Precast panels Ceilings Shelves/equip Hazmat
![Page 18: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/18.jpg)
Nonstructural hazards Precast panels Ceilings Shelves/equip Hazmat
2001
![Page 19: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/19.jpg)
Nonstructural hazards Precast panels Ceilings Shelves/equip Hazmat
1994
![Page 20: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/20.jpg)
EQ losses: What’s at risk? Life safety Building and contents Business continuity Public services Tax base Community resilience Neighborhood character & history Good will
![Page 21: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/21.jpg)
Business disruption Nonstructural damage Infrastructure & servicesWorkforce stability
![Page 22: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/22.jpg)
Nonstructural damage
![Page 23: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/23.jpg)
Infrastructure & services
1994
1989
![Page 24: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/24.jpg)
Parking structures: 1994 Inventory unknown Remaining risk
Life safety Building value Business continuity
![Page 25: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/25.jpg)
Soft story apartments “Tuck-under” Most residential 1960s-70s
Older in S.F.
![Page 26: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/26.jpg)
Bay Area soft story risk 15,000 buildings (1 in 6 multistory MFR)
500,000 people
San Francisco: 5700 buildings (over half) 180,000 people Half of S.F.’s total economic loss in 7.2 eq
Santa Clara County: 2630 buildings (1 in 3) 90,000 people
![Page 27: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/27.jpg)
Soft story apartments
1994
1989
19712003
1994
1989
1971
2003
![Page 28: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/28.jpg)
Soft story apartments Remaining risk
Life safety Housing Building value Personal
property Small business Emergency
response
![Page 29: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/29.jpg)
Soft story apartments No mandatory
retrofit in Bay Area AB 304 Berkeley CAPSS
![Page 30: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/30.jpg)
3. Codes are about Life Safety Not damage prevention Not business continuity Not workforce stability Not post-earthquake recovery
![Page 31: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/31.jpg)
Preparedness in perspective
1989 1994 2006 2012?
Response Recovery Mitigation
![Page 32: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/32.jpg)
4. Best preparation is mitigation Awareness, education Self-assess risks Professional consultation (engineer, lender,
insurer, attorney?)
![Page 33: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/33.jpg)
Resources Seismic Safety Commission:
seismic.ca.gov Commercial Property Owner’s Guide (1998) Risk Management Tools
ABAG: quake.abag.ca.gov Preparing your business Liability of businesses
![Page 34: Earthquake Risk and the Workplace Bonowitz.pdfEarthquake Risk and the Workplace David Bonowitz, S.E. Chair, SEAONC Existing Buildings Committee. Commission on Health and Safety and](https://reader033.fdocuments.us/reader033/viewer/2022042710/5f57741189ea6b77c23f2ab4/html5/thumbnails/34.jpg)
Lessons1. There is no code for existing buildings2. Nonstructural hazards are significant3. Building codes are about Life Safety4. Mitigation is the best Preparation