[Greenbuilding] fireproof light deck

[John Straube]

There seems to be some confusion.
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%).
All wood I have seen fails this, even fire retardent wood, because it off gases enough water and oils that it fails.
Gypsum looses too much mass, and would fail, except that it is grandfathered.
Fiberglass does not work. Concrete and steel do.

So Gennaro, do you mean non combustible or do you mean fire rated or something else?


On 2011-04-04, at 9:47 AM, Ron Cascio wrote:

> Check this material out;
>  
> http://www.timbersilwood.com/
>  
> Can't wait to try some of it out sometime soon.
>  
>  
> Ron
>  
> ----- Original Message -----
> From: David Bergman
> To: Green Building ; Gennaro Brooks-Church
> Sent: Monday, April 04, 2011 12:13 AM
> Subject: Re: [Greenbuilding] fireproof light deck
> 
> Gennaro,
> 
> 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.
> 
> 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.
> 
> 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?)
> 
> 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.)
> 
> David
> David Bergman  RA   LEED AP
> DAVID BERGMAN ARCHITECT / FIRE & WATER LIGHTING + FURNITURE
> architecture . interiors . ecodesign . lighting . furniture
> bergman at cyberg.com    www.cyberg.com 
> 241 Eldridge Street #3R, New York, NY 10002
> t 212 475 3106    f 212 677 7291 
> At 08:01 PM 4/3/2011, Gennaro Brooks-Church wrote:
>> Hello,
>> Can anyone suggest a lightweight non-combustible deck material for a roof deck?
>> 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.
>> Suggestion?
>> 
>> Gennaro Brooks-Church
>> 
>> Cell: 1 347 244 3016 USA
>> www.EcoBrooklyn.com
>> 22 2nd St; Brooklyn, NY 11231
>> 
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Dr John Straube, P.Eng.
Associate Professor
University of Waterloo
Dept of Civil Eng. & School of Architecture
www.buildingscience.com

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