Enhanced Fujita scale damage indicators and degrees of damage, chapter 6


Motels (M)

Typical Construction:

  • Less than or equal to four storeys
  • Facility made up of one or more multi-storey, rectangular buildings
  • Flat, gable, hip or mansard roof
  • Asphalt shingles, tile, slate or built up roof (BUR) roof covering
  • Plywood/OSB roof decking, wood or metal prefabricated roof trusses
  • Wood floor diaphragms, wood or metal stud walls
  • Stucco, EIFS, wood, metal or brick veneer wall cladding
  • Canopy over driveway at entrance; exterior walkways or balconies

Notes:

  • With hip roof, increase toward bound wind speed for Degree of Damage 4 (DODx) and DOD6
Table 6. 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 105 85 135
2 Loss of roof covering (up to 20%) 130 110 160
3 Broken windows or patio doors 145 120 170
4 Uplift of roof decking; significant loss of roof covering (more than 20%); loss of EIFS wall cladding 155 130 185
5 Uplift or collapse of canopy over driveway 160 130 190
6 Uplift or collapse of roof structure leaving most walls standing 200 165 230
7 Collapse of top story exterior walls 220 195 250
8 Collapse of most top story walls 230 205 260
9 Collapse of top two floors of three or more stories 275 230 300
10 Total destruction of entire building 305 260 350

*All wind speeds in km/h

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