Hi all:
Just a small additional note from my storage of historical notes. I have observed a dovetail type of attachment at the upper end of the rafter at the seating point on the girt. I know this is a little more work but it will hold the rafter from any movement out of its seating, and all that was used was one blacksmith made square nail to keep it in place. I believe the use of one oak peg will do the job as well as the nail, but I always revert back to what the old tyme framers used, and they did use dovetailled work in many instances where the attachments just couldn't move, NH