Gene,

I also am curious as to why this is not addressed in any literature - and have come to the conlcusion that it more than likely doesn't affect the structure. I have moved 4 barns in the past year that have been standing quite rigidly for 125+ years. The evidence shows that even with all the pegs pulled out, the structure is incredible. I cannot remember very many timbers hangin on pegs - although I am sure it happens. One thing to do to help in your question would be to cut all your joinery, and when everything is ready to raise, drill all your peg holes, being careful to layout from the bottom of all mortices and tenons. The theory here is that if the material sits around for awhile, you are compensating for the shrinkage by waiting until the last possible moment to drill your holes.

Mike