I have been working on drawings but wanted some feedback before proceeding. I do not have the option of increasing the pitch due to the restrictions of the main house form. Snow load is an issue in that we are in in northern Minnesota.
Certainly king post is an option. I can brace the trusses space allowing. A center post is possible on the freestanding end. The end towards the house can be securely attached to the existing structure. I want to avoid an internal center post. The roof structure would be birch tongue and groove, foam sheets, cdx and asphalt shingles. I do not have PE available locally for timber frame but can certainly send off the plans for review. My biggest concern now is sizing of the timbers. The trees are down and are soon off to the lumber mill. The bolts are big enough for 7x12s. Thanks for any suggestions.