Attack Line Handling

Firefighter Review Session Reference: 3 Topic: Attack Line Handling Level of Instruction: Time Required: Three Hours Materials:    • Two Fully Equipped Pumpers    • Structure for Use in Advancing Hose...


       to make entry should the initial attack crew require assistance

D. Master Stream Devices

  1. Water supply for master streams

       a. Pumper at water source sending water to pumper at fire

       b. Adequate number of supply lines laid between pumpers and from pumper at fire to master

          stream device

       c. No more than 100 feet of hose between pumper at fire and master stream device

  2. Use of master stream devices

        a. Fire attack

        b. Back-up

        c. Exposure protection

  3. Solid stream versus fog stream

        a. Solid stream most effective

            1) Wind conditions

            2) Strong draft created by large fire

            3) Distance from nozzle to building

        b. Fog streams superior

            1) Exposure protection

             2) Covers wider area

  4. Positioning device

        a. Fog nozzle must be positioned close to structure

        b. Solid stream functions better if positioned some distance from building

  5. Directing heavy streams

        a. Move horizontally back and forth across fire area

        b. Move up and down to reach full depth

        c. Look to see if water is entering building or hitting building

 

II . Built-In Fire Protection Systems (3-2)

A. Standpipe Systems

  1. Piping arrangement that carries water vertically and horizontally through building for firefighting

       operations

  2. Two types of systems

      a. Dry system - not connected to water supply

          1) Interior system has at least one outlet on each floor

           2) Exterior system usually runs along fire escape

           3) May include multiple interconnected systems

      b. Wet system - connected to one or more sources of water

           1) Minimum flow of 250 gpm at residual pressure of 65 psi on roof or

           2) Minimum pressure of 40 psi on 1-1/8-inch tip connected to 100 feet of 2-1/2-inch hose

               attached to highest outlet with nozzle on roof

           3) May include multiple separate or interconnected risers

  3. Fire department siamese

       a. Water should be pumped into any standpipe system being used for firefighting

       b. At least two lines should be connected

           1) First line to left intake and charged

           2) Second line to right intake

       c. If supply line cannot be connected to siamese, water can be supplied to system through outlet

          on first floor

      d. Pumper should be positioned within 50 feet

  4. Fire attack from standpipe systems

      a. Equipment

          1) 150 feet of 1-1/2-inch or 1-3/4-inch hose

          2) Nozzle

          3) Gated wye

          4) Pipe wrench in the event the hand wheel on outlet missing

          5) Secondary standpipe pack consisting of 2-inch or 2-1/2-inch hose

          6) Short section (5 feet) of 2-1/2-inch or 3-inch hose to go between outlet and gated wye

          7) Gated wye may be equipped with 1-1/2-inch to 2-1/2-inch increaser to permit connection of

              larger attack hose

      b. Beginning attack operations

          1) Connect to outlet in stairwell on fire floor (Firefighter I teaches to connect on floor below fire

               floor)

          2) Pull excess hose up stairway toward next floor before charging

          3) If outlet in corridor, connect on floor below fire floor

          4) Be careful not to impede evacuation or allow great volumes of smoke in stairway

B. Automatic Sprinkler Systems

  1. Types of systems

      a. Wet system - piping completely filled with water from source to heads

      b. Dry system - system contains water only from source to control valve

      c. Pre-action system - dry system with air exhausters controlled by heat detectors