Post on 02-Jan-2016
description
Belmont Fire PhotosBelmont Fire PhotosCourtesyCourtesy
Melvin ByrneMelvin Byrne
Loudoun County Loudoun County Fire/RescueFire/Rescue
ServiceService
Belmont Fire PhotosBelmont Fire PhotosCourtesyCourtesy
Melvin ByrneMelvin Byrne
Loudoun County Loudoun County Fire/RescueFire/Rescue
ServiceService
Leesburg
Sterling
Ashburn
Not To ScaleNot To Scale
425 429
TownhomesTownhomesUnder ConstructionUnder Construction
Single Family DwellingsSingle Family Dwellings
433
425 429
Fire Origin
Single Family DwellingsSingle Family Dwellings
433
425 429
DestroyedDestroyed
Single Family DwellingsSingle Family Dwellings
433
425 429
Substantially DamagedSubstantially Damaged
Single Family DwellingsSingle Family Dwellings
433
425 429
Minor Damage toMinor Damage toTownhousesTownhouses
Single Family DwellingsSingle Family Dwellings
433
House of Fire Origin
Primary Exposure
Secondary Exposure
Townhouses
Fire Separation Distance< 8 Feet6 Feet
CAUSE OF FIRECAUSE OF FIRELinked
to Drywall Curing
Operation in 433
Linked
to Drywall Curing
Operation in 433
CONTRIBUTING CONTRIBUTING FACTORS:FACTORS:
Propane StoragePropane Storage Propane StoragePropane Storage
Fire SeparationFire Separation Fire SeparationFire Separation
Cedar ShakesCedar Shakes Cedar ShakesCedar Shakes
Separation RequirementsSeparation Requirements
• 3 Feet From Lot Line
or
• One Hour Wall
8 FEET8 FEET
WEAK LINK HOUSEWEAK LINK HOUSE
ZONING AMENDMENT
• 0 Feet Side Yard
• 10 Feet Combined
10 Feet Separation
FIRE ORIGINFIRE ORIGIN
NFPA 80A
Recommended practice for fire protection of
buildings from exterior fire exposures
NFPA 80A
Provides an objective approach for the
designer to determine and mitigate fire risk
Fire Risk Determined By:
• Building Construction
• Opening Protectives
• Building Size
• Building Construction
• Opening Protectives
• Building Size
Fire Risk Mitigation
• Distance Between Buildings
• Residential Fire Sprinklers
• Fire Resistive Construction
Application Example
SD #99-00366
Roseberry Section 1
Lots 12 & 13
SD #99-00366
Roseberry Section 1
Lots 12 & 13
Exposure Analysis
• Width of Building - 48 ft
• Height of Building - 30 ft
• Fire Severity - Light
• Percent of Openings - 100%
Exposure Analysis Table Calculation
• 48 ft / 30 ft = 1.6
• Guide number is 1.74
• Separation Distance =(1.74 x 30 ft) + 5 ft = 57 ft
Means of Protection
• Spatial Separation - Table 2-3
• Construction Improvements
• Residential Fire Sprinklers
< 8 Feet6 Feet