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19 Cards in this Set
- Front
- Back
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IC’s decision of appropriate firefighting tactics and procedures is based on considerations of influencing factors such as |
Locating fire Smoke travel Weight of attack |
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2 things to make sure fire fully extinguished |
Ramping down and turning over techniques Cutting away |
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What does the thermal image camera assist |
Locating fire - as sight touch smell and sound are limited by fire and PPE |
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Locating fire from outside a building |
Gather all info from eye witnesses and premises owner Consult automatic fire alarm panel to see the location of the detector heads activated Look for Signs around building - smoke, discolouration of windows, blistered paint TIC - unusually high temps on building boundary Feel for hot doors/walls Characteristic odours that indicate type of material burning Listen for crackling |
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Locating fire within building |
Look for signs of smoke and signs of heat damage (blistering paintwork) Feel for hot doors walls or floors TIC - raised ambient temps, hot surfaces and door ways |
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Volume of smoke produced depends on |
The nature of the material - more carbonaceous = larger volume Amount of oxygen available - oxygen starved more smoky Amount of time fire has been alight |
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What does smoke indicate? |
Presence of unburnt fire gases and usually a lack of oxygen |
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What does the quantity and pressure of smoke emerging from compartment indicate? |
Stage of fire Development within building and potential for backdraught to occur |
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How does smoke travel |
Air currents - usually convection Mushrooming |
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What is know as weight of attack |
Number of jets Flow settings selected Size of hose |
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Considerations for deciding weight of attack |
Size and layout Location and access Probable fire loading Size of fire, fire development, growth and fire behaviour |
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Some incidents may require one or more 45 mm hose lines as minimum weight of attack such as ... |
Large or complex buildings where deeper penetration required Where the fire is well established or if compartment is large/complex/ extends over more than one level Compartment fires where there are high ceilings (over 5m) Any premises where there are signs and symptoms of flashover/backdraught Structural fires where fire has breached original compartment |
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If fire shows signs of backdraught or flashover what may need to be implemented before initial entry is made |
Second BA team with 45mm jet to cover and protect entrance/ exit route |
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How long should supporting hose lines be |
At least one length longer than initial firefighting jet so they can reach beyond and protect/rescue initial team |
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Why should debris be turned over and damped down |
Small pockets of fire cab continue to shoulder |
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Two main reasons for cutting away parts of building |
To investigate a suspected fire To locate and extinguish an inaccessible fire |
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How would you detect a fire under panelling |
Back of hand to feel for temp |
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Why would ceilings be cut away |
To get to fires in laths or timber joists To release water standing or collecting above them Remove portions of ceiling that are dangerous/ liable to collapse |
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Whatcwall would you work on if having to work on load bearing |
Highest possible as decreases in thickness |
