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deck</title></head><body>
<div>The issue in NYC is not combustability but flame-spread. That's
the test that yields the typical Class A rating, as far as I am aware.
Ipe was assumed to be Class A because importers said it was. I spoke
with the main researcher at the US Forest Service Forest Products Lab
who challenged this, given that no one had ever been able to produce
the actual studies that were being quoted by importers/resellers. He
told others calling him for verification to do their owns testing.
Finally, someone did and the results yielded a Class B rating. Thus,
all those roofs decked with ipê beyond 20% will likely go up just as
readily as good oak. And the other issue when doing this testing is
that, of course, ipê, like all woods, will lose mechanical
properties over time. The more porous the wood gets as it ages, the
more likely it is to support the spreading of a fire. For some reason,
I don't think this factor has ever been considered (unless people have
been told that that (spurious) Class A rating will only last for 10
years and then the building owner must replace the material with new
ipê.</div>
<div><br></div>
<div>IMHO, the only answer to this of which I know would be RPL.</div>
<div><br></div>
<div>tim keating</div>
<div><br></div>
<div>At 10:21 AM -0400 4/4/11, John Straube wrote:</div>
<blockquote type="cite" cite>There seems to be some
confusion.</blockquote>
<blockquote type="cite" cite>Non-combustible in the code does not mean
"it does not burn". It means it passes a silly ASTM
test, and does not lose more than x % of weight (I think
x=10%).</blockquote>
<blockquote type="cite" cite>All wood I have seen fails this, even
fire retardent wood, because it off gases enough water and oils that
it fails.</blockquote>
<blockquote type="cite" cite>Gypsum looses too much mass, and would
fail, except that it is grandfathered.</blockquote>
<blockquote type="cite" cite>Fiberglass does not work. Concrete and
steel do.</blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite>So Gennaro, do you mean non combustible
or do you mean fire rated or something else?</blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite>On 2011-04-04, at 9:47 AM, Ron Cascio
wrote:</blockquote>
<blockquote type="cite" cite><br>
<blockquote type="cite" cite><font face="Goudy Old Style"
size="+1">Check this material out;</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><a
href="http://www.timbersilwood.com/"><font face="Goudy Old Style"
size="+1">http://www.timbersilwood.com/</font></a></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><font face="Goudy Old Style"
size="+1">Can't wait to try some of it out sometime
soon.</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><font face="Goudy Old Style"
size="+1">Ron</font></blockquote>
<blockquote type="cite" cite> <br>
<blockquote>----- Original Message -----</blockquote>
<blockquote><b>From:</b> <a
href="mailto:bergman@cyberg.com">David Bergman</a></blockquote>
<blockquote><b>To:</b> <a
href="mailto:greenbuilding@lists.bioenergylists.org">Green
Building</a> ; <a href="mailto:info@ecobrooklyn.com">Gennaro
Brooks-Church</a></blockquote>
<blockquote><b>Sent:</b> Monday, April 04, 2011 12:13
AM</blockquote>
<blockquote><b>Subject:</b> Re: [Greenbuilding] fireproof light
deck</blockquote>
<blockquote><br></blockquote>
<blockquote>Gennaro,<br>
<br>
Add "eco material" to that description and it becomes an old
quest of mine. Are you talking about something to sit directly on the
"real" roof? About the best I could come up with when I last
tackled the question was lightweight concrete roof pavers -- not all
that eco though maybe there are some made with flyash.<br>
<br>
In terms of wood, NYC used to accept Ipe, but I heard a rumor they
stopped when the fire rating claims didn't prove out. And, of course,
there was the rainforest sourcing issue.<br>
<br>
I've looked for fire-rated recycled plastic lumber from time to time,
but have not yet found any. (Tim V-K: any updates you've heard
of?)<br>
<br>
There is a group called Brooklyn Bridge Forest
( http://www.brooklynbridgeforest.com/) that is trying to set up
a sustainable source for greenheart for maintaining the Brooklyn
Bridge. I'm not sure what kind of fire rating greenheart does or
doesn't have. (According to one site I just googled, it carries a
"high/medium" rating.)<br>
<br>
David<br>
David Bergman RA LEED AP<br>
<font size="-1" color="#808080"><b>DAVID BERGMAN</b> ARCHITECT
/ <b>FIRE & WATER</b> LIGHTING + FURNITURE<br>
</font><font color="#808080">architecture . interiors
. </font><font color="#008080">ecodesign</font><font
color="#808080"> . lighting . furniture<br>
</font><a href="mailto:bergman@cyberg.com"><font size="-1"
color="#808080">bergman@cyberg.com</font></a><font size="-1"
color="#808080"> <u>www.cyberg.com</u> </font
><font color="#808080"><br>
<font size="-1">241 Eldridge Street #3R, New York, NY 10002<br>
</font>t <font size="-1">212 475 3106 f 212 677
7291</font> <br>
</font>At 08:01 PM 4/3/2011, Gennaro Brooks-Church wrote:<br>
<blockquote type="cite" cite>Hello,<br>
Can anyone suggest a lightweight non-combustible deck material for a
roof deck?<br>
In New York a brownstone has an average flat roof of 700sq.ft. The law
only allows 20% of it to be covered with combustible decking, which
isn't much of a deck. Yet the non-combustible decking is too heavy for
the old roofs.<br>
Suggestion?<br>
<br>
Gennaro Brooks-Church<br>
<br>
Cell: 1 347 244 3016 USA</blockquote>
<blockquote><a
href="http://www.EcoBrooklyn.com">www.EcoBrooklyn.com</a><br>
22 2nd St; Brooklyn, NY 11231<br>
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<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite>Dr John Straube, P.Eng.</blockquote>
<blockquote type="cite" cite>Associate Professor</blockquote>
<blockquote type="cite" cite>University of Waterloo</blockquote>
<blockquote type="cite" cite>Dept of Civil Eng. & School of
Architecture</blockquote>
<blockquote type="cite" cite><a
href="http://www.buildingscience.com">www.buildingscience.com</a></blockquote
>
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