Enhanced Fujita scale damage indicators and degrees of damage, chapter 22

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Service Station Canopies (SSC)

Typical Construction:

Modern service stations consist of a very large canopy covering the entire pump area and a small building that houses cashier and retail space
Canopy structure constructed of steel beam framework supported on four or more tall columns
Metal panels cover bottom side of the canopy
Light weight fascia materials, either metal or plastic, cover the perimeter of canopy

Table 22. 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	100	70	125
2	Fascia material blown from canopy	125	105	155
3	Metal roof panels stripped from canopy	150	120	180
4	Columns bend or buckle under wind load	175	140	215
5	Canopy collapsed due to column foundation failure	185	145	230
6	Complete destruction of canopy	215	175	260

*All wind speeds in km/h

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Date modified:: 2018-09-18