I can only tell you about my personal experiences.
Years ago, I had a customer who wanted to create a new barn from old salvage timbers. These timbers were to be re-cut to smaller sizes to make the timbers for the barn parts.
Their building inspector wanted these salvage timbers grade stamped.
The customer hired a traveling graded to come to my sawmill yard and grade stamp these timbers. He rejected several that he though weren't good enough.
Last year at the TTRAG conference in Southern NH, I met this traveling grader again. He told the group that his lumberman's association will NOT be grading salvage timbers any more.
It was his advice that before you attempt to re-construct a new building from salvage or recycled timbers you check with your building departments, as to whether or not they will allow it or not.
I would suggest you have an informal conversation with your building inspector.
Asking the wrong question will get you a conditioned response. What I mean is if you ask them "Do I need to have my timbers grade stamped?" They most likely will reply: "yes, of course."
But if you tell them what you intend to do and ask: "what will you need from me to allow me to do this?" You may hear that you need your timbers grade stamped, you may not.
My point is don't ask a leading question.
With the fact that you intend to place such a roof load on this recycled structure you should have your plans reviewed by an engineer who is familiar with timber framing, as that is a substantial load on old timbers.
Good luck with your project.
Jim Rogers
