Water Sprinkler Protected Areas vs. Hazard Classification
Maximum protection area per sprinkler:
| Hazard Classification | Ceiling and Sidewall Construction | Maximum Protected Area | ||
|---|---|---|---|---|
| (ft2) | (m2) | |||
| Light | Standard pendent and upright sprinklers | Unobstructed | 225 | 20.9 |
| Non combustible obstructed | 225 | 20.9 | ||
| Combustible obstructed | 168 | 15.6 | ||
| Standard sidewall sprinklers | Combustible finish | 120 | 11.1 | |
| Noncombustible finish | 196 | 18.2 | ||
| Ordinary | Standard pendent and upright sprinklers | All | 130 | 12.1 |
| Standard sidewall sprinklers | Combustible finish | 80 | 7.4 | |
| Noncombustible or limited combustible finish | 100 | 9.3 | ||
| Extra | Standard pendent and upright sprinklers | All | 100 | 9.3 |
| High-piled | Standard pendent and upright sprinklers | All | 100 | 9.3 |
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