Publication Number 420-143, October 1996
Table 6. Fire suppression of flame length and fireline intensity (Source: Andrews 1986).
| Flame Length | Fireline Intensity | Interpretation |
|---|---|---|
| Ft | Btu/ft/s | |
| < 4 | < 100 | Fire can generally be attacked at the head or flanks by persons using handtools. |
| 4 - 8 | 100 - 500 | Fires are too intense for direct attack on the
head by persons using handtools.
Hand line cannot be relied on to hold a fire. Equipment such as plows, dozers, pumpers and retardant aircraft can be effective. |
| 8 - 11 | 500 - 1000 | Fires may present serious control
problems - torching out, crowning and
spotting.
Control efforts at the fire head will probably be ineffective. |
| > 11 | > 1000 | Crowning, spotting,
and major fire runs are probable.
Control efforts at head of fire are ineffective. |
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