Chapter 16: Supply Line And Attack Line Evolutions

Question 1

Forward Hose Lay (Straight Hose Lay)

Answer 1

Most often used by the first arriving engine company at the scene of a fire. The hose is laid out from the water supply source, such as a fire hydrant, and unfolds as the apparatus approaches the fire. The apparatus stops near the fire hydrant and a firefighter steps off of the apparatus and secured the hose around the hydrant. Once the hose is secured, the apparatus proceeds to the fire. As the apparatus moves forward, a length of supply hose unfolds from the apparatus and onto the ground.

Question 2

Four-Way Hydrant

Answer 2

A device that is placed on a fire hydrant, in which the water flows initially from the fire hydrant through the valve to the supply hose, which delivers the water to the attack engine. The supply engine can hook up to the four-way hydrant valve and redirect the flow of water by changing the position of the four way hydrant valve. The water then flows from the hydrant to the supply engine. The supply engine increases the pressure by using a pump and discharges the water into the supply hose, boosting the flow of water to the attack engine. A four-way hydrant valve ensures that the supply hose can be charged with water immediately using the pressure from the hydrant, yet still allow for a second engine, the supply engine, to connect to the hose line later to provide pump pressure.

Question 3

Reverse Hose Lay

Answer 3

The hose is laid out from the fire to the water source, such as a fire hydrant, in the direction opposite to the flow of the water. To perform, the supply engine stops close to the attack engine on arrival, and supply hose is pulled from the bed of the supply engine and connected to the suction side of the pump in the attack engine. The supply engine then drives to the fire hydrant, connects the supply hose to the water source, and pumps water back to the attack engine. Usually the supply engine parks in such a way that hose can easily be pulled from the supply engine to the suction side of the pump in the attack engine.

Question 4

Split Hose Lay

Answer 4

Performed by two engines in situations where hose must be laid in two different directions to establish a water supply. This evolution can be used when the attack engine must approach a fire either along a dead end street with no hydrant or down a long driveway. To perform a split hose lay, the attack engine drops the end of its supply hose at the corner of the street and performs a forward lay towards the fire. The supply engine stops at the same intersection, pulls off enough hose to connect to the end of the supply line that is already there, and then performs a reverse hose lay to the hydrant or static water source. With two lines connected together, the supply engine can pump water to the attack engine. Often requires a two way radio because the attack engine must advise the supply engine of the plan and indicate where the end of the supply line is being dropped.

Question 5

Subtitle: Loading Hose

There are 3 ways to load a hose. What are they?

Answer 5

1. Flat Hose Load
2. Horseshoe Hose Load
3. Accordion Hose Load

Question 6

Flat Hose Load

Answer 6

The easiest loading technique to implement and can be used for any size hose. With the hose laying out flat with no kinks or twist, west and tear in the edges of the hose from the movement and vibration of the vehicle during travel are minimized.

Question 7

Horseshoe Hose Load

Answer 7

Accomplished by placing the hose on its edge and positioning it around the perimeter of the hose bed in a U-shape. At the completion of the U-shape, the hose is folded inward to form another U-shape in the opposite direction. Cannot be used for LDH because the hose tends to fall over when it stands on edge and leads to more wear and tear in general, because the weight of the hose is supported by the edges.

Question 8

Accordion Hose Load

Answer 8

Performed with the hose placed on its edge. In this loading technique l, the hose is laid side to side i. The hose bed. Easy to implement and carry. FF can carry multiple folds per person from the hose bed. It’s not recommended for LDH because the hose tends to collapse when placed in its side.

Question 9

Subtitle: Supply Hose Carries and Advances

There are two supply house Carrie’s and advancements. What are they?

Answer 9

1. Working Hose Drag
2. Shoulder Carry

Question 10

Working Hose Drag

Answer 10

Used to deploy hose from a hose bed and advance the line over a relatively short distance to the desired location. Depending on the size and length of the hose, FF may be required to perform this task.

Question 11

Shoulder Carry

Answer 11

Used to transport full lengths of hose over a longer distance than it is practical to drag a hose. It is also useful when a hose line must be advanced around obstructions.

Question 12

There are two types of standpipe systems

Answer 12

1. Dry Standpipe
2. Wet Standpipe

Question 13

As a guideline, how much should sprinkler systems be fed at?

Answer 13

150 psi

Question 14

Before advancing an attack line into a building, what type of pattern should the hose be flaked, outside the building to prevent the hose from being tangled up?

Answer 14

A serpentine pattern

Question 15

Advancing Attack Lines from the Attack Engine to the Door

Answer 15

• Stand out of the rig and wait for Captains instructions to grab a line.

• When the attack line has been laid out to the entry point, the hose should be flaked out in a serpentine to avoid entanglement.

• It should be set back from the doorway so that it does not obstruct the entry and exit path.

• Signal the driver to charge the line.

• Check the correct pattern of stream and then bleed out the line.

• Check and then Don your PPE and SCBA.

• Verify your crew is ready and then advance on the Captains go.

Question 16

Advancing Attack Lines from the Door to the Fire

Answer 16

• Moving inside the building, stay low to avoid the greatest amount of heat and smoke as possible.

• If you cannot see because of the dense smoke, use your hands to feel the pathway in front of you so that you do not fall into a hole or other opening.

• Look for the glow of the fire and check the sensation of heat coming through your face piece.

• Communicate with others who’re advancing.

Question 17

Friction Points

Answer 17

Places along the hose line where the hose is changing directions, turning a corner, going through a doorway, or going up or down stairs. Friction points are those places where you can predict that the hose will become caught and will slow or stop the advance of the hose line.