However, I left Lima with a much larger family with many more brothers and sisters. If you are reading this, you likely are plugged into current research in fire dynamics and tactical operations. What B-SAHF indicators could be observed on Side C up to the point where firefighters began to force entry and ventilate the basement approximately Photo by Steve Skar. A transitional phase in the development of a compartment fire in which surfaces exposed to thermal radiation reach ignition temperature more or less simultaneously and fire spreads rapidly throughout the space resulting in full room involvement or total involvement of the compartment or enclosed area NFPA This transition is often assumed and in many cases explicitly stated to take place between the growth and fully developed stages. The nature of common building contents provides a rapid increase in heat release rate HRR and corresponding oxygen consumption, resulting in the fire becoming ventilation controlled.

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Video of several incidents involving explosions during structural firefighting operations have been posted to YouTube in the last several weeks. Video screen shot from the cfnt of Luis Giribaldi and 28 de Julio. What differences in conditions would be cause for concern?

» Extreme Fire Behavior | Compartment Fire Behavior

Live Fire Training Part 2: On arrival, Engine B reported a two-story, single family dwelling with fire showing from the basement level on Side Bravo. After searching Bedroom 2 and entering Bedroom 1 temperature contiued to increase and TB observed flames rolling through the upper layer in the hallway leading from Bedroom 2 and the Bathroom.

We did temporarily after receiving our training as instructors in the flashover trainer. Keep in mind that while being right is great, it is more important to work through the process of figuring things out to improve your understanding.


The only significant heat indicators are limited velocity of smoke discharge and variations in buoyancy of smoke visible from Sides B and C. Image from Google Mapsclick on the link to walk around using Street View. In addition, we do not have substantive information from the fire investigation that occurred after the fire was extinguished.

No significant changes in Building, Heat, or Flame indicators. Keep in mind that there is a significant difference between focusing on the B-SAHF indicators in this context and observing them on the fireground. If conditions deteriorate, a hoseline allows self-protection and provides a defined egress path.

Side C and the Loading Dock Door Figure 12shows Side C of the fire building and Exposure C and the loading dock door that was breached to provide access to the fire building from Side C immediately prior to the backdraft.

In particular, focus on fire behavior indicators that may point to changes in conditions. Four other firefighters were inside Exposure B when the extreme fire behavior occurred. What leads you to the conclusion that this was or was not a backdraft?

The violence of the explosion see blast damage to the roof on Side D in Figure 3 cffbt to the potential for ignition of pre-mixed fuel smoke and air, resulting in a smoke explosion.

The speed of fire development is limited by the availability of atmospheric oxygen provided by the current ventilation profile of the compartment or building.

Posts Tagged ‘Extreme Fire Behavior’

Given the location of the door and door on Side A illustrated in the previous post in this seriesit is likely that the stairway to the basement is just inside the door in Side C and a stairway to Floor 2 is just inside the door on Side A. Smoke on Side C appears to have a faintly pulsing air track with low velocity which is masked to some extent by the effects of the wind swirling smoke due to changes in low level wind conditions.


However, our analysis of the video can take advantage of our ability to pause, and replay key segments, or the entire clip as necessary. While draft stops slow fire and smoke spread, they do not stop it completely and it is common for smoke to spread beyond the fire area despite the presence of draft stops. If not, why do you think that this was the case?

What indicators are observed at the window on Floor 2 immediately after breaking the glass? It is essential to communicate observations of key fire behavior indicators and changes in conditions to Command.

However, there cbt no discussion of what influence these multiple layers may have had e. It is difficult to determine the interior layout from the exterior as there are numerous openings in interior walls due to renovations and changes in occupancy over time. Did any of these indicators point to the potential for extreme fire behavior?

Avoid working in the exhaust portion of the flow path between the fire and exhaust opening or potential flow paths between the fire and potential exhaust openings. Engine E arrived and reported to Command for assignment. The key with fuel is understanding its characteristics and using the minimum quantity of fuel that will provide sufficient context for the training to be conducted.

The crbt was irregularly shaped with attached exposures on Sides B and C. Luis Giribaldi Street and 28 de Julio Street Today The building involved in this incident is still standing and while it has been renovated, is much the same as it was in