Dave –
The mere presence of a ridge born by posts does not alone resolve thrust.
This now common framing scheme is known as a “structural ridge” and the key ingredient without which this design will not work, is for some reason I do not understand, almost always not mentioned when this comes up here at AtE.
A Simpson type strap must be present to fasten the rafters either to the ridge or each other, essentially eliminating thrust by putting them in tension and now imparting something more than half of their dead and live load to the ridge and the load path that bears it.
That path, with this design, always going directly to ground.
And “a couple feet” translates into much moment.
Anything greater than say one, requires careful planning, in that the moment increases from every inch thereafter, almost exponentially.
Be your best.
