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Originally posted by Slice
The key here: The black smoke indicates a fuel-rich fire.
Originally posted by bsbray11
Originally posted by Slice
The key here: The black smoke indicates a fuel-rich fire.
Or fuel-poor.
What I think it was, was lack of fuel, excess of oxygen. My two cents.
Originally posted by jofomu
I'LL BET YOU REAL HARD EARNED CASH THAT THE TEMP HAS GONE UP.
BUT!!!
BUT, both fires STILL register 100C, at source.
Until some of you fools get an education, you'll be here arguing nonsense until you're old and grey.
Lightweight and Truss Construction Hazard
One of the most serious building construction hazards facing firefighters today is the increased use of lightweight and trussd support systems. Lightweight construction is mostly found in houses, apartments, and small comercial buildings. Lghtweight steel trusses are made from a long steel bar tht is bent at a 90 degree angle with flat or angular pieces welded to the top and bottom. For steel trusses, 1,000 degrees F (538 C) is the critical temperature.
This is a good time for sprinkler systems 101.
Fire suppresion in the way of sprinklers is quite a neat thing. The systems work extermely well in either putting out the fire, or at leat removing enough heat to keep it manageble untiil some attack lines can put it out. This is the same for WTC. Each sprinkler head will most times have a small glass vial that has some liquid and a bubble in it. When this liquid reaches 155 degrees (unless in a kitchen over a stove) the bubble expands and breaks the glass vial. This turns only the sprinkler heads directly above the fire on. This does two things. First it makes it so the limited amount of availible water until the FD arrives is concentrated over the fire only. Second it keeps excessive damage to a minimum.
Now the neat part. Every building with a sprinkler system has a fire department connection. What we do is connect an engine/pumper to this connection, we then throttle up and super charge it with the power of a class A pumper. This makes each on of those sprinlers into a very effective fire hose. This is why those fire trucks on 911 were crushed, they were right next to that building forcing 300 lbs of water pressure into that building. All large buildings have redundent lines leading to the sprinkler system, and this is what keeps it from losing control. That is why you see so much white steam coming form the floors on WTC, they were cooling the fires and keeping it from getting too hot.
It is this fact and many other that made me come here in the first place. Of course you dont hear this from the media. Most people dont realize we super charge the system with multiple apperatus.
Originally posted by Slice
We all know what is inside office buildings.... PAPER is one thing...
I highly doubt that it was "fuel-poor".
When something is "fuel-rich" some of the combustibles are unable to find oxygen to burn with so they are instead ejected with the rising heat.