Wood Truss test Burn
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This video was created to help show firefighters the dangers of wood truss roof assemblies when they are exposed to fire. The video contains excerpts of tests burns that were conducted on a wood truss assembly and also a wood "stick built" roof assembly. The test burns were not scientific and are not intended to discredit trusses; they were conducted simply to help educate the fire service of the dangers that trusses pose if they are exposed to fire. Trusses have many good features. The issue the fire service needs to be keenly aware of is that they fail quickly when exposed to a fire. Granted most building codes provide a good degree of protection for trusses. But the problem arises when the fire either originates in the truss space or, somehow, extends into it, thus exposing the truss to fire. And then, as Francis Brannigan so accurately stated, "Gravity Always Wins"
Canal: Howto & Style
Añadido: November 30, 1999 at 12:00 am
Autor: dkwalsh
Duración: 03:56
Puntuación: 4.29
Reproducciones: 25652
Etiquetas: burn test Truss Wood
Comentarios
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rosscorion12 (November 30, 1999 at 12:00 am)
Thanks for posting it... this is one of the best (most educational) videos I've seen. Usually you only see something this good through experience... We had a close call the other night (Mar 28th); an Engine crew had JUST walked out of a fully involved residential after knockdown (because the attack line burst) when the whole garage collapsed behind them. Seconds litterally made the difference...
dkwalsh (November 30, 1999 at 12:00 am)
We had a few firefighters posted up on a near-by training structure watching,they said they saw no indication of an impending collapse; it was literally there one second and gone the next. You're 100% correct; we only put 300 lbs spread out over the roof whereas 2 firefighters in full PPE with proper equipment can easily weigh more than 250 lbs.each. There's a message here....Thanks for watching, commenting and realIzing the potential dangers; NEVER TRUST A TRUSS!!!DKW
rosscorion12 (November 30, 1999 at 12:00 am)
It would be cool to see another view... maybe a top view (roof view) to see what it looks like right before the truss fails. Two firemen (plus gear) would weigh about 500lb., so it would fail even faster than 5 minutes if someone was up there venting...
71b (November 30, 1999 at 12:00 am)
Great job. Can I repost this and use it for training?
Captmto (November 30, 1999 at 12:00 am)
A great training tool. Thanks for posting this!
wolfshadow666 (November 30, 1999 at 12:00 am)
i build trusses for a living and to be honnest its pretty damn cool to see em burn ... lmfaoooo
dkwalsh (November 30, 1999 at 12:00 am)
Yes,the tests were conducted by the Fire Science program at Dutchess Community College in Poughkeepsie, NY
99subi (November 30, 1999 at 12:00 am)
IS this in NY?
dkwalsh (November 30, 1999 at 12:00 am)
FACT:trusses fail quickly and without warning in a fire. 29 firefighters died between 98-03 from truss failures. Firefighters have to operate anyplace on a roof so the roof must be able to support them anyplace. Was the test scientific; probably not; was it realistic; absolutely. If the side of the roof ahd been closed in the roof would have likely failed quicker due to the contained heat.
theartofdime (November 30, 1999 at 12:00 am)
Excellent video showing how unstable and unreliable wood trusses are under fire conditions. Thank you for posting this
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