Hi Canopy,

This type of work is very complicated like TWrestler mentioned. However if you are good with drafting and geometry then it is achievable. I have not seen Will's article but I am sure it is very informative and will get you on your way. By the way, I was taught this type of work over two years and needed every minute of it. The less difficult way is to represent all pieces with a centerline and draft accordingly to find your angles. These angles can be set with a bevel off of your drawing and then transferred to the sticks during lay-out.

My advice to you would be to read Will's article thoroughly and then proceed with your model. I think you are wise in building the model first.

When you add an overhang with different pitches you have just increased the complications even more so! Nice!

Build the roof first in your mind and then bring the rest of the frame up to it (plates and everything below).

You will have some cool joinery at your kingposts. You might want to look into having the hips housed onto your kingpost and then have your common rafter on the short wall housed into both hips. Sorry, it is hard not to make all of this sound convoluted.

I was looking through my old pictures and found these two. This might give you a better idea of the joinery (although not completely the same as described above). Most likely the top of your kingpost is going to be "backed" with the roof plane on three sides.

Hi Canopy,
Here's a picture from my article of a frame by Jack Witherington that shows big overhangs and different pitches. Note the plate height difference and the offset of the hip from the corner formed by the plates.

While I can figure angles, choosing proper joinery is still a question mark. At this point I think it is best to seek an expert. What I need is someone to polish out the frame layout, size the wood, and define the joinery. I am willing to pay for such help. Any ideas where to turn to at this point?

I'm actually taking my first vacation in many years to Thailand in a few weeks. Are you living there full time? PM me, and I'll try and help out.
Brad

Yes, living in Thailand full time 8 years and running. PM enthusiastically sent!

There are several Articles about Hip/Valley Timber Framing in the Timber Fram Joinery & Design Workbook (Volume One) (the red one).
It also has information on the Hawkindale Angles for the same roof. Worth the money. I assume the new Volume has equally good information.
Another good book about roof framing is The Roof Framer's Bible from Amazon. It is more specific to stick framing, but will help with the offset hips of a Bastard Roof (having different pitches on adjoining slopes).

There are several Articles about Hip/Valley Timber Framing in the Timber Frame Joinery & Design Workbook (Volume One) (the red one).
It also has information on the Hawkindale Angles for the same roof. Worth the money. I assume the new Volume has equally good information.
Another good book about roof framing is The Roof Framer's Bible from Amazon. It is more specific to stick framing, but will help with the offset hips of a Bastard Roof (having different pitches on adjoining slopes).

I am working on a 6/12 to 9/12, the numbers aren't bad but the new building coming into the old building is not square to the old building, throwing a twist into things.

Tim

Well there it is, my first small frame.

Nicely done! What species - WRC?