Enhanced Fujita scale damage indicators and degrees of damage, chapter 4
Manufactured Homes: Double Wide (MHDW)
Typical Construction:
- Steel undercarriage supported on concrete block piers
- Multi-unit connection at roof, floor and end walls
- Frame straps and ground anchors spaced 3 - 4 metres apart
- Flat, gable or hip roof shape; asphalt shingles or metal roof panels; plywood/OSB roof decking; wood rafter or shallow joist construction; metal, vinyl or wood siding
| DOD | Damage Description | EXP | LB | UB |
|---|---|---|---|---|
| 1 | Threshold of visible damage | 100 | 80 | 120 |
| 2 | Loss of shingles or other roof covering (up to 20%) | 120 | 100 | 140 |
| 3 | Damaged porches or carports | 125 | 110 | 155 |
| 4 | Broken windows | 135 | 110 | 155 |
| 5 | Uplift of roof deck and loss of significant roof covering material (more than 20%) | 140 | 120 | 175 |
| 6 | Complete uplift of roof; most walls remain standing | 150 | 125 | 175 |
| 7 | Unit slides off CMU block piers | 150 | 125 | 175 |
| 8 | Removal of entire roof structure leaving most walls standing | 155 | 130 | 190 |
| 9 | Complete destruction of roof and walls leaving undercarriage in place | 180 | 150 | 210 |
| 10 | Unit rolls, displaces or vaults | 185 | 130 | 210 |
| 11 | Undercarriage separates from floor, rolls and tumbles, badly bent | 205 | 175 | 235 |
| 12 | Complete destruction of unit; debris blows away | 215 | 190 | 250 |
*All wind speeds in km/h
Page details
- Date modified: