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3 Cards in this Set
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Describe Wind Driven fire characteristics...
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> Wind greater then 15-20 mph.
> Temps can double witin seconds > 2-1/2 hose flowing 300gpm unlikely to overcome heat levels. > Unlikely that stairwell pressurization will stop fire gas flow > If wind driven conditions are recognized, safe entry to fire floor may not be possible. If wind conditions are suspected to be possible what can we do to help detect them? |
Using a halligan, push in a security peep-hole on apartment or stairwell door. Watch for fire and/or smoke driven out of hole under high pressure.
HRTM 27 (A) (B) |
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How many Mitigation choices are there for Wind Driven Fires?
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There are four mitigation choices, describe them...
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1. If no life safety conerns, DON'T enter.
2. If life safety concern exists, attempt wall breach for shielding 3. If stairwell is smoke filled & roof access is open, PPV from below fire floor. 4. If stairwell is smoke filled & roof access is NOT open, PPV will not help much. HRTM 27 (C) |
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Stack Effect is also referred to as?
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Chimney Effect.
Explain what this is... |
movement of air driven by buoyancy, into/out of buildings, due to a difference in indoor-to-outdoor air density resulting in either a positive or negative force.
HRTM 28 (A) |
