Enhanced Fujita scale damage indicators and degrees of damage, chapter 1

Small Barns or Farm Outbuildings (SBO)

Typical Construction:

Less than 250 square metres (m²)
Wood or metal post and beam construction
Wood or metal roof trusses
Wood or metal panel siding
Metal or wood roof
Large doors

Table 1. Degree of Damage (DOD) for Expected (EXP), Lower Bound (LB) and Upper Bound (UB)
DOD	Damage Description	EXP*	LB*	UB*
1	Threshold of visible damage	100	85	125
2	Loss of wood or metal roof panels (up to 20%)	120	100	145
3	Collapse of doors	135	110	165
4	Major loss of roof panels (more than 20%)	145	125	175
5	Uplift or collapse of roof structure (more than 50%)	150	125	185
6	Collapse of walls	155	130	190
7	Overturning or sliding of entire structure	160	135	190
8	Total destruction of building	180	150	210

*All wind speeds in km/h

List of 31 Damage Indicators

Page 1

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Table of Contents

1. Small Barns or Farm Outbuildings (SBO)
2. One- or Two- Family Residences: 100-500m2 (FR12)
3. Manufactured Homes: Singe Wide (MHSW)
4. Manufactured Homes: Double Wide (MHDW)
5. Apartments, Condominiums and Townhouses: 3 Storeys or less (ACT)
6. Motels (M)
7. Masonry Apartments or Motels (MAM)
8. Small Retail Buildings (SRB)
9. Small Professional Buildings: Single Storey, less than 500 m2 (SPB)
10. Strip Malls (SM)
11. Large Shopping Malls (LSM)
12. Large Isolated Retail Buildings (LIRB)
13. Automobile Showrooms (ASR)
14. Automobile Service Buildings (ASB)
15. Elementary Schools (ES)
16. Junior and Senior High Schools (JHSH)
17. Low-Rise Buildings: 1-4 Storeys (LRB)
18. Mid-Rise Buildings: 5-20 Storeys (MRB)
19. High-Rise Buildings: Greater than 20 Storeys (HRB)
20. Institutional Buildings (IB)
21. Metal Building Systems (MBS)
22. Service Station Canopies (SSC)
23. Warehouse Buildings (WHB)
24. Free-Standing Towers (FST)
25. Free-Standing Light Poles, Luminary Poles, Flag Poles (FSP)
26. C-1 Electrical Transmission Lines (C-ETL)
27. C-2 Trees (C-T)
28. C-3 Heritage Churches (C-HC)
29. C-4 Solid Masonry Houses (C-SMH)
30. C-5 Farm Silos or Grain Bins (C-FSGB)
31. C-6 Sheds, Fences or Lawn Furniture (C-SFLF)
32. Glossary
33. EF-Scale Canada
34. Acknowledgments

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Date modified:: 2014-05-07