On Wed, 25 Jul 2018 20:03:54 -0700 (PDT), DerbyDad03
wrote:

My buddy is trying to determine the best way to roof the treehouse he is building.
He is ready to start cutting the rafters, but he is not sure how
to deal with the trunks. You'll notice the issue immediately.
We have some ideas, but I don't want to influence anyone, so I'll keep them
to myself for now.
This question is mainly about rafter layout, not about sealing the roof
from rain, although suggestions/experience related to that are also welcome.
Ground Level View
https://i.imgur.com/AS3HhDw.jpg
Crotch Level View (leave it alone!)
The board is there just to show the height of the crotch
https://i.imgur.com/xuP7NfY.jpg
Bird's Eye View (simulated)
https://i.imgur.com/VI41CBE.jpg
The smaller branches are not an issue, they will be cut. It's the 2 main
trunks that need to be dealt with. Based on the location of the trunks,
neither 16" OC or 24" OC will clear them.
Have fun!


Just thinking outside-the-box - if it doesn't need to be
weather-tight or insect-tight perhaps a couple or three
colourful tarps could be used .. ?
John T.