Roof planes

[ebdesign]

As others have said, it's a basic geometry problem. But, what the heck, it was interesting.
The 2nd flr wall on the right is set back 9'-3" from the 1st flr garage wall on the left. Given equal roof properties & a 9/12 slope, the total rise is 110.25". That means that the absolute ceiling/plate hgts of those two walls/rooms need to have a difference of 110.25" (& roof baselines- assuming the base lines are over the wall main layer) The 2nd flr room had an assigned plate hgt (default) that was 5/8" too low. That is why Chief was generating two different roof planes w/ a small hip roof section coming up from the right side gable wall. Chief was just building what it was told to build given the room/wall properties. When the default ceiling/plate hgt for flr2 was raised 5/8", auto roofs worked perfectly. If raising the 2nd floor ceiling plate hgt is not gonna happen, then the difference would have to be made up w/ the rafter heel cut over one of the two walls......or one of the walls have to move (probably the garage wall- as Joe said).

There were plenty of "traps" in this plan that had to be dealt w/ before I got comfortable; the dimensional properties of the walls, auto & manual dimension locate properties. I turned on the tilde to see any dimensions that were not exactly what they said. The 2nd flr main front wall (in front of entertainment room) was not exactly co-linear w/ the short wall on the other end of the gable. The rear wall is 3 different walls which needed to be made co-linear. All this to be sure that the dimensions were locating what was assumed.
Fun little exercise.
Plan attached.
Jim