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Questions and Answers
What is the primary skillset that a firefighter should possess?
What is the primary skillset that a firefighter should possess?
What is the purpose of performing a size-up before stretching the initial attack line?
What is the purpose of performing a size-up before stretching the initial attack line?
What is the recommended flow rate for a typical 2000 square foot, two-story single-family dwelling home without basement or exposures?
What is the recommended flow rate for a typical 2000 square foot, two-story single-family dwelling home without basement or exposures?
What is the flow rate of a 65mm attack line when supplied with proper pressures?
What is the flow rate of a 65mm attack line when supplied with proper pressures?
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How many lengths of hose should be added to the estimated distance to the entry point of a structure for a typical residential structure?
How many lengths of hose should be added to the estimated distance to the entry point of a structure for a typical residential structure?
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What type of structure requires an establishment of 1892 L/min (500 GPM) from three handlines?
What type of structure requires an establishment of 1892 L/min (500 GPM) from three handlines?
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What is the minimum flow rate required from two handlines on the fire floor in a high-rise building?
What is the minimum flow rate required from two handlines on the fire floor in a high-rise building?
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What does the acronym 'ADULTS' stand for in the fire service?
What does the acronym 'ADULTS' stand for in the fire service?
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When deciding what size hose line to stretch as an initial attack line, what conditions would lead to choosing a 65mm hose line?
When deciding what size hose line to stretch as an initial attack line, what conditions would lead to choosing a 65mm hose line?
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What is the primary tactic chosen when a firefighter can efficiently advance the hose line to the seat of the fire by going interior?
What is the primary tactic chosen when a firefighter can efficiently advance the hose line to the seat of the fire by going interior?
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What is the purpose of a backup line in firefighting operations?
What is the purpose of a backup line in firefighting operations?
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What is the recommended flow rate from a 65mm hose line?
What is the recommended flow rate from a 65mm hose line?
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When is a 65mm hose line recommended for initial deployment?
When is a 65mm hose line recommended for initial deployment?
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What is the purpose of directing a straight or solid stream into an opening?
What is the purpose of directing a straight or solid stream into an opening?
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What is a 'working length' of hose classified as?
What is a 'working length' of hose classified as?
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Why is a steep angle required when directing a straight or solid stream?
Why is a steep angle required when directing a straight or solid stream?
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Study Notes
Length Selection of Hose Line
- To select the proper length of hose, a size-up must be done to locate the fire and consider the setback, height, and depth of the structure.
- For a typical residential structure, estimate the distance to the entry point and add one length per floor plus one extra length.
Size Selection of Hose Line
- TFS uses 45mm and 65mm attack lines, each flowing 570 L/min and 950 L/min (combination fog) or 1003 L/min (smooth bore) respectively.
- NFPA 1710 recommends flow rates for different occupancies:
- 2000 sq ft, two-story single-family dwelling home: 1140 L/min (300 GPM) from two handlines.
- Open-air Strip Shopping Center: 1892 L/min (500 GPM) from three handlines.
- 1200 sq ft apartment in a three-story garden style apartment: 1140 L/min (300 GPM) from three handlines.
- High-Rise building (> 75 ft): 1892 L/min (500 GPM) from two handlines on the fire floor, and 946 L/min (250 GPM) on the floor above.
ADULTS Acronym
- Use the ADULTS acronym to decide what size hose line to stretch as an initial attack line:
- A: Advanced fire on arrival
- D: Defensive operations
- U: Unknown location or extent of fire
- L: Large un-compartmented areas
- T: Tonnes of water
- S: Standpipe operations
- A 65mm hose line shall be chosen on extended lays wit the use of a reducer. Or, in any commercial/industrial fire.
Deployment of Hose Lines
- If a firefighter can efficiently advance the hose line to the seat of the fire by going interior, it should be the primary tactic chosen.
- If flames are visible from the exterior and advancing the line to the interior may be delayed, a straight or solid stream directed into the opening may be the quickest way to cool the space.
- A ‘working length’ of hose shall be deployed to the appropriate entrance of the structure, classified as a nozzle and a coupling at the entrance or 50 feet of hose unimpeded by friction points.
Placement of Additional Hose Lines
- A backup line will be stretched at every fire and shall be at least one length longer than the initial line.
- The backup line shall be at least the same size and flow rate, or larger than the initial line.
- A second attack line may be deployed if the initial line cannot extinguish the fire or is stretched short of the seat of the fire.
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Description
Learn the guidelines for deploying and advancing the proper size and length of hose in firefighting, including selecting the right length of hose for a fire scenario.
