I am having some spruce timbers milled in the next few days. Some of the sawlogs don't have the small end diameter necessary for the 8x8 timbers I had planned for( 16 x 24 ft tall post frame). If I reduce the timber size, should I go with 7 x 7 or 6 x 8. These will be used as common rafters and or top plates. All other timbers will be 8 x8, and 8 x10 (main girts). Any suggestions appreciated. This is my first project and I anticpate modifiying the frame plans accordingly. Thanks
