I cut some 6x6s at work today. With a 2" stub tenon, and a 5.5 inch tenon on the top, they need to be 88" tall. Log was 176" I guess it won't hurt if a tenon here or there ends up a little short.

I will be I am framing the 8x8s to a 7.5" ideal timber. How do I shape the housing? Do I cut it all the way across the bottom of the plate, or do I cut it to fit the top of the 6x6? I will probably not use a header, as the opening is already fairly low. I think a sliding door will work the best for this shed. Thanks for the input.