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RESIDENTIAL FIRE SEPARATION CASE STUDY

RESIDENTIAL FIRE SEPARATION CASE STUDY. BELMONT SUBDIVISION. Ashburn, Virginia. 1994. Belmont Fire Photos Courtesy Melvin Byrne Loudoun County Fire/Rescue Service. Leesburg. Ashburn. Sterling. 433. Single Family Dwellings. 425. 429. Townhomes Under Construction.

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RESIDENTIAL FIRE SEPARATION CASE STUDY

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  1. RESIDENTIAL FIRE SEPARATION CASE STUDY

  2. BELMONT SUBDIVISION Ashburn, Virginia 1994

  3. Belmont Fire Photos Courtesy Melvin Byrne Loudoun County Fire/Rescue Service

  4. Leesburg Ashburn Sterling

  5. 433 Single Family Dwellings 425 429 Townhomes Under Construction Not To Scale

  6. 433 Single Family Dwellings 425 429 Fire Origin

  7. 433 Single Family Dwellings 425 429 Destroyed

  8. 433 Single Family Dwellings 425 429 Substantially Damaged

  9. 433 Single Family Dwellings 425 429 Minor Damage to Townhouses

  10. House of Fire Origin

  11. Primary Exposure

  12. Secondary Exposure

  13. Townhouses

  14. 6 Feet < 8 Feet Fire Separation Distance

  15. Linked to Drywall Curing Operation in 433 CAUSE OF FIRE

  16. Propane Storage CONTRIBUTING FACTORS: Fire Separation Cedar Shakes

  17. Separation Requirements • 3 Feet From Lot Line or • One Hour Wall

  18. DALE CITY Trentdale

  19. 8 FEET WEAK LINK HOUSE

  20. HERITAGE HUNT Gainesville

  21. ZONINGAMENDMENT • 0 Feet Side Yard • 10 Feet Combined

  22. 10 Feet Separation

  23. SENTRY RIDGE Manassas

  24. FIRE ORIGIN

  25. NFPA 80A Recommended practice for fire protection of buildings from exterior fire exposures

  26. NFPA 80A Provides an objective approach for the designer to determine and mitigate fire risk

  27. Fire Risk Determined By: • Building Construction • Opening Protectives • Building Size

  28. Fire Risk Mitigation • Distance Between Buildings • Fire Resistive Construction • Residential Fire Sprinklers

  29. Application Example SD #99-00366 Roseberry Section 1 Lots 12 & 13

  30. Width of Building - 48 ft • Height of Building - 30 ft • Fire Severity - Light • Percent of Openings - 100% Exposure Analysis

  31. 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

  32. Spatial Separation - Table 2-3 • Construction Improvements • Residential Fire Sprinklers Means of Protection

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