Ken, do you have an idea of how much proportion of the roof load transfers to the purlin plate-queen post bents and how much goes to the top plates. Support is just about mid span on a 15+' rafter and 8/12 pitch.
Also have you used these plane frame analysis programs and do have suggestions how to get attain the programming? However, Tim was right ,I know the frame design, joinery ,species,sizing works fine by looking at the extant barns. I did really want to more calculate the loads to the beams to show they can handle the floor and the roof loads. tb