Enhanced Fujita scale damage indicators and degrees of damage, chapter 28

C-3 Heritage Churches (C-HC)

Typical Construction:

Table 28. 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	90	70	110
2	Loss of roof covering material (up to 20%)	115	90	140
3	Loss of significant roof covering material (more than 20%); light damage on the bell-tower summit	145	115	175
4	More than 50% of roof structure removed; collapse of the bell-tower summit (spire); walls remain standing	185	150	220
5	More than 80% of roof structure removed; walls partly collapsed; bell-tower structure damaged	225	190	260
6	Roof structure totally removed and blown away; many walls collapsed; bell-tower structure mostly destroyed	270	230	310
7	Complete destruction of building	315	275	355

*All wind speeds in km/h