Finding flat planes within round logs...

The process of laying out and cutting the tops of the ridge and roof perlins was a new learning experience.

The ridge log was quite straight and went well.

Two more perlins and it was time to check the top surface alignments. Oh, oh, the results were not good and some adjustments were needed. You can see the notches in the middle two perlins. This was the depth to remove in order to get the tops all in the same plane for a good flat surface for the roof boards to lay on. Seems that the problem was with the string and distance it was away from the log where it curved and twisted. What to do?

The solution was to nail on a 2x4 at each gable log end. Then run two lines that would not touch the log but be in the roof plane I wanted. Then use a light straight stick and project the points where that plane intersected the log edge. I drove in some duplex nails and wired the lines to them to make sure the line did not move when the stick was slid along it.

And there we have it! The roof frame is cut and joined. Will take a break for a while and work on some other projects then begin the process of taking it apart and cribbing up the parts out of the way so I can begin the cabin walls this fall.