Session Reference: 3
Topic: Attack Line Handling
Level of Instruction:
Time Required: Three Hours
• Two Fully Equipped Pumpers
• Structure for Use in Advancing Hose
• Engine Company Fireground Operations, Second Edition, NFPA, Pages 2-6, and Chapters 4 and 6-11
• Essentials of Fire Fighting, Fourth Edition, IFSTA, Chapters 12 and 13
The firefighter will demonstrate a general understanding of the construction, operation, and utilization of fog and solid stream nozzles and, by participation and observation, a knowledge of the various nozzles, hose layouts, appliances, and procedures involved in applying water at
a structural fire.
Attack Line Handling
• Handlines and master streams
• Built-in fire protection system components
• Hose and nozzle selection
• Hose stream placement
• Supporting built-in fire protection systems
Session 3 Attack Line Handling
SPO The firefighter will demonstrate a general understanding of the construction, operation, and utilization of fog and solid stream nozzles and, by participation and observation, a knowledge of the various nozzles, hose layouts, appliances, and procedures involved in applying water at a structural fire.
EO 3-1 Describe the appropriate number, size, and placement of fire streams needed to deliver the required fire flow at structural fires.
EO 3-2 Describe the engine company responsibility for supporting built-in fire protection systems.
EO 3-3 Demonstrate various sizes of hose and different nozzles used to produce streams for fire attack.
EO 3-4 Demonstrate the placement of fire streams at structural fires.
EO 3-5 Demonstrate the utilization of the engine company to support built-in fire protection systems.
I . Handlines And Master Streams (3-1)
NOTE: Some material may be a review since handline operation and setting up master stream devices are included in Firefighter I. Focus should be more on handline and master stream selection and application in fire situations.
A. Hose Line Selection
1. Engine company must be considerate of limitations of various sizes of hose
2. In addition to flow limitation, there is factor known as friction loss which affects fire flows
a. Loss of pressure within hose line due to internal resistance of water against hose lining
b. Friction loss affected by three factors
2) Hose length
3) Size of hose
c. Should be consideration to engine company crew when selecting attack lines which must be stretched over long distances
3. Maximum flow capabilities for attack lines
1-1/2-inch 125 gpm
1-3/4-inch 150 gpm
2-inch 200 gpm
2-1/2-inch 250 gpm
3-inch 400 gpm
4. Range of nozzle flows for combination nozzles with recommended nozzle pressure of 100 psi
1-1/2-inch 30 gpm to 125 gpm
1-3/4-inch/2-inch 95 gpm to 200 gpm
2-1/2-inch 125 gpm to 250 gpm
5. Flows for a 2-1/2-inch straight tip nozzle with recommended nozzle pressure of 50 psi
1-inch tip 210 gpm
1-1/8-inch tip 266 gpm
1-1/4-inch tip 328 gpm
6. Flows from master stream devices
a. Fog nozzle minimum is 500 gpm at 100 psi nozzle pressure
b. Flows for straight tips with recommended nozzle pressure of 80 psi (rounded)
1-1/2-inch 600 gpm
1-5/8-inch 700 gpm
1-3/4-inch 800 gpm
1-7/8-inch 900 gpm
2-inch 1000 gpm
7. Friction loss for attack lines
a. For 1-1/2-inch, 1-3/4-inch, and 2-inch attack lines, 30 psi per hundred feet
b. For 2-1/2-inch attack lines, 15 psi per hundred feet
c. 1-1/2-inch, 1-3/4-inch, and 2-inch attack lines should not exceed 300 feet in length
d. 2-1/2-inch attack lines should not exceed 500 feet
e. When lengths of attack line beyond those recommended are required, consideration should be given to using 3-inch, 4-inch, or 5-inch hose to get water closer to the fire scene and dividing the flow into more manageable size attack lines using wyes or manifolds
B. Initial Attack