Yes it can be substituted. I have the icc report number at work that specifically says that, so I'll post that later.
-----Original Message-----
From: ken ng [mailto:zy7up@yahoo.com]
Sent: Tuesday, June 02, 2009 10:18 PM
To: seaint@seaint.org
Subject: the use of T1-11 Siding PlywoodCan I use T1-11 exterior plywood sheathing for shearwall?If yes, would that mean I would not need plywood or OSB sheathing for my shearwall?