I do realise that the TF is strong enough, however I'm going for overkill with the plywood sheathing. The Sobon shed is the little structure on the top right on the books/publications page. I'm actually modifiying it and using purlins instead of rafters. I'm also raising the posts to 3' above the cross/tiebeams and running the roof out another 4 feet horizontally for a covered deck.
As for the drywall, I though about routing out the posts etc.. so that it would fit inside with the plywood lying flat on the outside. what do people usually do between dry wall and a post. I would think that you need to cover this joint with something as the posts shrink they would pull away from the drywall.
Carlos
