Enhanced Fujita scale damage indicators and degrees of damage, chapter 29
C-4 Solid Masonry Houses (C-SMH)
Typical Construction:
- Asphalt shingles, tile, slate or metal roof covering
- Flat, gable, hip, mansard or mono-sloped roof or combinations thereof
- Plywood/OSB or wood plank roof deck
- All exterior walls are solid masonry construction (e.g. double brick)
- Roof is wood joist and rafter construction
Notes:
- With hip roof, increase toward upper-bound wind speed for Degree of Damage 4 (DODx) and DOD5
| DOD | Damage Description | EXP* | LB* | UB* |
|---|---|---|---|---|
| 1 | Threshold of visible damage | 105 | 85 | 130 |
| 2 | Loss of roof covering material (up to 20%), gutters and/or awning; loss of vinyl or metal siding | 125 | 100 | 155 |
| 3 | Broken glass in doors and windows | 155 | 125 | 185 |
| 4 | Uplift of roof deck and loss of significant roof covering material (more than 20%); collapse of chimney; garage doors collapse inward; failure of porch or carport | 155 | 130 | 185 |
| 5 | Large sections of roof structure removed (more than 50%); most walls remain standing | 195 | 165 | 240 |
| 6 | Exterior walls collapsed | 245 | 210 | 285 |
| 7 | Most walls collapsed, except small interior rooms | 285 | 245 | 325 |
| 8 | Complete destruction of building | 315 | 275 | 355 |
*All wind speeds in km/h