Gib:
As I'm from the East coast of New England, I can't comment on any timber framing engineers that are familiar with your area, in regard to codes rules and loads.
You could do a search in the Resource guide of the guild, and find a company that is licensed in your area and familiar with your area's load requirements and codes. Finding someone in your area would or should reduce the costs as they have done such work there before and don't need to do the research to find out your area's snow, wind and other loads.
If you need help finding/using the resource guide, post another notice and I can tell you step by step instructions.
Good luck with your project.
Jim Rogers
