Hybrid Timberframe and Dovetail Square Log House

[landrand]

I'm in the preliminary design stage in building a hybrid house using both dovetailed square log and timber framed construction.  I'll try to attached is a sketch of the floorplan from a visio drawing. 

The center section would be timber framed constructed.  This center section would be approximated 18'x40' and consist of the great room (with cathedral ceilings) and an entry way with loft above.  I would like to use hammer beam bents in this section. The front and back walls would have 4 posts extending down to the foundations while the internal bents would have a clear span hammer beam trusses.  The bays would be spaced 10' or 12' apart using 8"x10" white pine timber posts and rafters.  The center section exterior would be enclosed with SIP panels (front and back portions).

Attached to the center section are two wings.  One wing will be the kitchen/dinning room while the other will be the master bedroom/bathroom.  For these wing sections, I would like to use square 8"x10" white pine log walls with a full dovetail corner and a 1" to 1.5" chink space between logs.  The wings will be something like 16'x24' or 16'x30'.  The wing log walls will buttress against the posts in the hammer beam bents.  That should help with any spreading forces exhibited on the hammer beam bents.  If need be, I can increase the size of the posts to 10"x10" or larger. 

My main concern is the attachment of the wing log walls to the posts in the center timber framed section. I'm not real sure how this should be done.  I cut my own timbers and they have been drying for four or five years so settling should be minimal.  Any idea's or suggestions on how to attach a square log wall to a timber frame post would be appreciated. 

[Thehardway]

I would use a Corner Post design.  A dado is cut into the posts and then the logs are tenoned to fit into the dado.  Can also be done with a verticle spline if both sides are cut in and a 2x inserted as spline.  Vertical corner posts are used in many log home designs though less common than stacked corner styles.  Your floor plan and layout is quite similar to mine.  Very little space wasted in halls and such.