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