[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: GSBN:First ASTM E-119 Full Scale Fire Test with Hose Stream Test - PASSED!
- To: "GSBN" GSBN@...
- Subject: Re: GSBN:First ASTM E-119 Full Scale Fire Test with Hose Stream Test - PASSED!
- From: "Bohdan Dorniak & Co Pty Ltd" bdco@...
- Date: Thu, 20 Jul 2006 08:37:55 +0930
- Reply-to: "GSBN" GSBN@...
- Sender: "GSBN" GSBN@...
Hi you pyromaniacs
Congratulations on your results.
Good luck with your next test.
I know what the feeling is after successful testing - like we did in Aussie
after our tests.
----- Original Message -----
Sent: Thursday, July 20, 2006 7:24 AM
Subject: GSBN:First ASTM E-119 Full Scale Fire Test with Hose Stream Test -
Just a quick report from Elmendorf, Texas...
The first straw bale fire test was completed just a couple of hours ago -
successfully! This was the wall with two string (polypropylene ties) bales
on-edge and cement-lime stucco. The test ran for the full two hours followed
by the hose stream test. We were well within the limits of temperature rise
and had no water penetration through the unheated side of the wall after
2-1/2 minutes of fire hose blasting from 20 feet away at a nozzle pressure
of 30psi. This pressure would be sufficient to knock a man down if you hit
him in the chest with it...not a trivial force.
A few details... in the first twenty minutes or so we saw cracks develop in
the stucco on the heated side. By half an hour into the test we started to
see some flames coming from those cracks - which intensified throughout the
rest of the test as the cracks in the stucco grew larger and longer. The
stucco bulged outward away from the bales over a good percentage of the wall
on the heated side - perhaps as much as 8 or 10 inches away in the lower
middle of the wall.
The test requires approximately a 1000Â° F temperature rise in the first 5
minutes and then steadily increasing temperatures to approximately 1850Â° F
at the end of two hours. Steam and then steam and smoke were visible coming
from the top of the wall after the first few minutes and eventually there
was a steady, though not huge amount of smoke coming from the upper sides
and top of the panel. The bales tested at about 19 percent moisture content
just prior to beginning the test. This is a somewhat high moisture content
caused by wetting the stucco for curing and then covering both sides of the
panels with heavy plastic to keep the walls from drying out during curing.
The temperature on the unheated side of the wall reached 166Â°F for the
highest reading (at one of the upper thermocouples) but that reading dropped
in the last twenty minutes or so of the test to 164Â°F and none of the other
thermocouples got that hot. The temperature at the beginning of the test was
88Â°F so this was a maximum temperature rise on the unheated side of the wall
of 76Â° F.
Significantly, when the test panel was pulled away from the furnace, the
entire stucco skin on the heated side of the wall fell away. There was a
flame-up that lasted less than a minute and went out on its own. So when the
hose stream test began, it was blasting on unprotected bales! This is pretty
close to the worst case scenario - bales on edge, with all the poly ties
burned away, and no stucco to deflect the water stream. And it still passed.
There was charring ranging from an inch or two to almost a foot in a few
places near the edges corners and at the top with an average of about 3 - 4
inches of straw burned away.
There will be more details about this in the near future, and another
report tomorrow afternoon after we fire test the earthen plastered wall. But
for now, we're celebrating and thinking about suitable beverages for the
occasion! We took lots of video and pics and they should be available
somewhere in the near future.
It'll be a hot time in the old town tonight - but not as hot as it was
earier in the day...
Warmest regards (and I do mean warmest - it must be over 100Â° outside
David Eisenberg (and Matts Myhrman, Bruce King, Ben Obregon, Bill
Christensen, Frank Meyer and a few others)
Check out AOL.com today. Breaking news, video search, pictures, email and
IM. All on demand. Always Free.
--- StripMime Report -- processed MIME parts ---
text/plain (text body -- kept)