Enhanced Fujita scale damage indicators and degrees of damage, chapter 7
Masonry Apartments or Motels (MAM)
Typical Construction:
- Less than or equal to four storeys
- Facility made up or one or more multi-storey, rectangular buildings
- Flat, gable, hip or mansard roof
- Asphalt shingles, tile, slate or BUR roof
- Light steel roof framing with metal deck and lightweight insulation
- Pre-cast or hollow-core concrete roof and floor system
- Concrete Masonry Units (CMU) non-bearing walls
- CMU load-bearing walls
- Stucco, EIFS, or brick veneer wall cladding
- Exterior walkways or balconies
| DOD | Damage Description | EXP | LB | UB |
|---|---|---|---|---|
| 1 | Threshold of visible damage | 105 | 85 | 130 |
| 2 | Loss of roof covering (up to 20%) | 130 | 110 | 165 |
| 3 | Uplift of lightweight metal roof decking | 155 | 130 | 185 |
| 4 | Uplift of concrete roof decking | 195 | 165 | 230 |
| 5 | Collapse of top storey walls | 215 | 185 | 240 |
| 6 | Collapse of top two floors of three or more storeys | 250 | 210 | 290 |
| 7 | Total destruction of a large section of building | 290 | 255 | 330 |
*All wind speeds in km/h