All the wood I will be using will be treated pine, including the 8x8 posts. I know that treated wood doesn't necessarily preclude rot, but I was thinking of treating them with some additional chemical, for example, some paint/sealer type product. My dilemma is that the footers will be four feet down (frost-line), which makes assembling any type of post-bottom yoke quite difficult, let alone placing it in the correct spot on the footer.

I will be using a 7.5/12 pitch for the roof. There will two bents, the front side gable and the backside gable. The bent spacing is ten feet, on center. The 8x8 purlins will be spaced three feet apart, notched 1" into the rafter.

Please explain how an 8x10 rafter using an 8x12 tie beams, king posts and struts plan is underdesigned. I can do the math, I just don't know how. If you forward me to some resources where I could check some of these loads, I would appreciate it. Better yet, are there any 10'x20' timber frame pavilion plans out there?

Thanks for your help, Tim