resiliency – property insurer’s view documents/standards... · 4) better assurance that:...
TRANSCRIPT
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Resiliency –
a Property Insurer’s View
November 2011Dan Howell, PE
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FM Global (Factory Mutual)–
Est. 1835–
Commercial Property Insurance –
Business Model: •
Research•
Loss prevention engineering•
Risk improvement–
220,000 insured locations–
1200 field engineers –
350 Loss Prevention Data Sheets
Losses ($) Nat Haz / Fire / Other
Risk Improvement–
Physical –
Human Element / Response
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FM Global Research Campus
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Building Hazards
•
Natural Hazards–
Flood
–
Wind–
Earthquake
–
Snow–
Ice
–
Rain–
Hail
–
Bush/Wild Fire•
Fire (occupancy)
•
Other (blast, impact, terrorism, etc.)
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Flood
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Flood (2008 Midwest)
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Flood (2008 Midwest)
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Flood: Water Treatment Plant
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Flood
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Flood
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Reducing Flood Damage
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Wind: Roof Flashing
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Wind : RTU
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Failure of Dock Door(s)
Roof Failure?
Dock Door
Dock Door
Dock Door
Dock DoorDoor Fails
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Wind: Building envelope is breached (dock door, windows, louvers,etc.)
•
“Enclosed”
→ “Partially Enclosed”Internal pressure: 3x +/-External pressure: no change Net wind pressure increases
(low rise, low slope) by:
35% / 25% on walls (f/c) +/-30% / 20% / 15% on roof (f/p/c) +/-
•
Could lose portion of roof → significant PD & BI
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Dock Door Bracing (int
+ ext)
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Miami-Dade NOA –
Dock Door
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Miami-Dade NOA –
Dock Door Submittal Drawing (SF = 1.5)
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Wind damage to port cranes
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Broadcast tower: Ice + wind
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Broadcast station roof: ice shedding and debris impact
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Coordination of Design Disciplines (Arch & Struct)
Wind Uplift on deck w/MASP: line load ≠
uniform load
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Snow collapse at roof step (high/low bay)
Low BayHigh Bay
Wind
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Snow collapse at roof step (new/exist.)
Existing Bldg
New Bldg or Addition
Wind
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Snow: purlin
failure
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Snow: purlin
failure (corrosion)
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Corrosion: Food processing plant (high int. humidity)
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Rain/Drainage: roof + wall
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Rain/drainage: soaked cover boards and ponding
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Rain/drainage: blocked scupper
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Partially blocked drains, slope
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Material deterioration
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Wave/surge damage to wharf utilities
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Wave/surge damage to wharf
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EQ damage: Storage rack (photo courtesy of ABS consulting)
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EQ damage: Electrical equipment (photo courtesy of ABS consulting)
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EQ damage –
Non Struct
Comp (photo FEMA 74 1994 Northridge)
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Example: Hospital losses (2005-2009)
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Example: Telecom equipment bldg losses (1980-2000)
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520 large multi-national companies (annual revenue >$1 billion): Avg. Loss Severity ($/loss)
≈7x
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Katrina Losses
≈6.7x
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Perception of Risk: Exposure, Concern, and Preparation
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Perception of Risk: Wind Speeds
“50-year”
= 2% annual probability of exceedance
(PoE)
“50-year”
= 1 failure every 50 years?? No.
We just had a hurricane –
I’m good for 50-years?? No.
•
“50-year”
(64% PoE
over 50 years)•
“100-year”
(39% PoE
over 50 years)•
“500-year”
(10% PoE
over 50 years)
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Summary 1) FM supports evolution of code/std/guidelines for improving performance &
resiliency of the built environment2) Exposure-driven risk-based approach (beyond life safety) 3) Whole building approach –
e.g., more attention to building envelope (wind) and non-struct
comp (EQ)4) Better assurance that: As-built = As-designed•
Targeted (exposure) inspection/observation and enforcement • Periodic inspection (corrosion/alteration) (Risk & resiliency improvement similar to risk improvement with 1200 FM field engineers inspecting insured locations) 5) Nat Haz
Response Team (facilities) –
feasible/enforceable?6) Design: Better arch/struct
coordination (how?)7) Risk awareness: countering wishful thinking (e.g. likihood, PoE)
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Questions/comments?