I know no one wants to do it, but contact your local building dept and ask. They will come out to your site and tell you what is possible for your area.
Usually this type of project is an easy one, unless you are on the shoreline.
Some simple Simpson Strong-Tie - Helping to Build Stronger, Safer Structures
connectors can usually solve any problems.
Beam and post sizing will be determined by roof pitch and snow loads..hehe.
The rafters may need some blocking in between to help stop racking of the roof, this is because the fiber panels cannot. And some lag bolts into a ledgerboard every 16 inches , alternating up and down will keep the roof attached to the building, as long as they are catching something behind the plywood.
Your building official will answer all those questions.