Re: [GBlist] PLYWOOD ROOF DECK

[John Salmen <terrain@shaw.ca>]

Hi Alan

I'm not sure about getting the info on the t-111spec as it is a ply siding
with a simple lap joint not intended for loading. Interesting product though
but I read an article about it delaminating under extreme moisture.  A solid
wood shiplap would probably perform better at similar cost or even ext.
grade ply t&g sheathing. The 8' of eps though probably would provide the
loading you need if it was a single piece of eps. if that is what you were
wondering about - the compressive strength is pretty high though I like the
idea of using it in layers.


----- Original Message -----
From: "Alan Abrams" <awabrams@starpower.net>
To: <greenbuilding@crest.org>
Sent: Wednesday, April 17, 2002 3:42 PM
Subject: [GBlist] PLYWOOD ROOF DECK


> can anybody advise me on the structural properties of 5/8" T-111 type
> (yellow pine) panels as a roof deck with the following green roof
> application:
>
> the panels would be applied directly to wood joists @ 24" oc.;
> with a membrane roof and 16mil poly root barrier applied to the panels;
> then, (4) layers of 2" extruded ps insulation;
> filter fabric;
> hydrodrain;
> last, 4" extensive soil mix and plantings
>
> I've searched the APA site, but cannot find (or recognize) the specs for
> t-111.
>
> Thanks in advance
>
> Alan Abrams
> (designing his first green roof)
>
>
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______________________________________________________________________
This greenbuilding dialogue is sponsored by REPP/CREST, creator of
Solstice http://www.crest.org, and BuildingGreen, Inc., publisher of
Environmental Building News and GreenSpec http://www.BuildingGreen.com
______________________________________________________________________