Enhanced Fujita Scale Damage Indicators and Degrees of Damage

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
Table 29. Degree of Damage (DOD) for Expected (EXP), Lower Bound (LB) and Upper Bound (UB)
DODDamage DescriptionEXP*LB*UB*
1Threshold of visible damage10585129
2Loss of roof covering material (less than 20%), gutters and/or awning; loss of vinyl or metal siding127101156
3Broken glass in doors and windows154127183
4Uplift of roof deck and loss of significant roof covering material (20% or more); collapse of chimney; garage doors collapse inward; failure of porch or carport156130187
5Large sections of roof structure removed; most walls remain standing196167238
6Exterior walls collapsed245210286
7Most walls collapsed, except small interior rooms285247325
8Complete destruction of building315275355

*All wind speeds in km/h