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Wood Trusses Can Be Killers!
This is a great video of wood trusses in fire conditions versus dimensional, stick-built lumber under fire conditions.
We all know about the hazards associated with wood truss roof systems, but it is worth looking at again, and again and again.
Training and recognition are key in keeping ourselves and our crews safe.
Check it out and pass on to others, it really is a cool video.
http://firefightersenemy.com
Replies to This Discussion
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Permalink Reply by Loyd Dittfurth on
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I really would have thought that the stick built roof would have gone first.
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Permalink Reply by Anita King on
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This is a great reminder to all of us about the dangers of wood truss construction. We learn it in FFI and teach it every time we get a chance, but do we really keep it in the forefront of our minds when we get ready to enter? Excellent video.
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Permalink Reply by Mike Schlags (Captain Busy) Retd on
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a nice addition to the roof orientated training issues... what's under the roof is certainly a big deal... good post.
CBz
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Permalink Reply by Jason Hoevelmann on
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Thank you.
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Permalink Reply by Tony P on
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A roof collapsing in five minutes? Doesn't give long, does it...
A classic that I've spoken of before (somewhere) is the effect of fire on a truss built member providing the beam for the ground floor ceiling and the floor for the upper floor. In this instance the plasterboard had all fallen from the ceiling, leaving a perfect view of the timber truss members all sitting in place. All the components. When you looked closer you could see that there were NO gusset plates left in place - none. All of these rather important members were on the kitchen floor with the remains of the plasterboard. Does anyone think that ir would have been safe to walk on that upper floor?
Prefabricated trusses are strong, engineered to be so. What seems totally left from the design (in my unlearned view at least) is strength and resiliance during a fire. A totally truss-built pre-fabricated frame nursing home is just going up near me. When taking into account the time between a fire starting, being registered by the alarm system, being confirmed by staff and evacuation started; do I think that the building could be safely evacuated - say at night with fewer staff - before any collapse occured? I could hope that it was well underway at least.
Trusses. We have to be aware of them at all times. Increased risk to us every time, increased risk to residents in many cases.
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