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19-4 is a test burn in the A/B Division. The window is removed prior to ignition on the A Division. The room loaded with furniture and carpet. As the fire develops, the wind speed is 8 MPH plus with gusts. The room begins to exhibit extreme fire behavior characteristics demonstrated at 17:29. The wind forces the high temperatures to the floor below the window sill and the lower temperatures are seen at ceiling.
At the 17:28 the crew begins to apply pulsing stream into the fire compartment with the stated conditions. The crew failed to cool as they approached the door. The nozzle person is faced with approximately 1500 degrees with extreme heat flux. Pulsing is not sufficient to kill the fire growth. Full flow wide pattern with the nozzle provides the flow and the protection to kill the fire. |
Published on Mar 7, 2013
This video demonstrates the use of the door to control the air intake to reduce thermal insult to fire personnel and better control the fire. When you watch this video observe the area inside the door and above the attack position. The fire attack was done with a low expansion foam tube flowing 20 gpm of 0.40% Novacool solution through a 1" attack line. When the door is open the fire continues to grow as the amount of air flowing into the room allows the fire to overcome the 20 gpm Novacool solution stream. The thermal insult to the firefighter is great during this attempt to control the fire. When the door is totally closed there is no visible fire in the attic area. The lack of an air intake greatly slows the fire spread in the attic. When the door is cracked the fire in the attic becomes visible and grows. The nozzle is placed into the opening of the cracked door flowing towards the bottom of the room. The fire attack with the door cracked allows the 20 gpm Novacool solution stream to overcome the fire and nearly eliminate the thermal insult to the firefighter. |
This video, as seen from an ISG E-380 thermal imager, shows the fire attack during Kill the Flashover 2012. The fuel load was a couch located in the kitchen area of the house. The fire attack was done through an exterior window using a Novacool wetting agent solution. This test was designed to demonstrate the effectiveness of a transitional fire attack which began on the exterior of the building.
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This video shows the exterior thermal imaging video as seen from the ISG E-380 thermal imager during Kill the Flashover 2013 Burn 19-2. This fire attack was a traditional fire attack using an 1 3/4" attack line flowing 40 gpm of 0.40% Novacool solution. A total of 7 gallons of foam solution was utilized to control the fire. The fog stream was moved aggressively around the fire room which allowed the fuels to be quickly cooled, reducing the thermal insult to the firefighters. The interior thermal imaging video can be found on the KillTheFlashoverProject YouTube page. As time progresses we will be posting numerous angles from this burn as we had 19 cameras recording on each burn we conducted during Kill the Flashover 2013.
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The video on the left is a traditional attack with agent stream. The fire is in the A/B corner. The attack team enters from the front door (A) moves down a short hall, turns to the left. Notice the traditional application of the stream in the upper thermal layer. Although this is an excellent application of a traditional attack, our tests are evaluating the importance of applying the stream on the combustible level first (48 inches or below) to stop the off gassing and quickly reducing the flaming when suppressing contents of a compartment. The service has taught the stream application to begin in the upper thermals and we see most firefighters use that principle in most all applications. Not all applications are equal. |