Subject: 2 tree design/spans
I like the basic two tree design that's on the website. However, I am looking to work with 2 sturdy ponderosas that are 15 or 16 feet apart. i'd like the width to be 10 feet. I'm not sure whether its best to run 2x8 joists in the 10' direction, perpendicular to the line of the two trees, and if so, what size do the other 4 beams need to be? - Or, do i run very wide maybe 2x12 joists the full span of 15-16 feet, directly attaching them to one fixed beam, and running perhaps a few of them on sliding metal plate over the other fixed beam on the other tree - and again, what size lumber is needed? traditional span charts don't seem to work for this... i hope this makes sense. the basic question is: how would you apply the basic 2-tree plan to a wider span?
my other questions are:
1. would you adjust the triangular support for a wider span? what's an appropriate size and material?
2. which pieces should be pressure-treated and which don't need to be?
3. any tips on the roof? would you attach to the tree? or bolt 4x4 posts to the floor frame and build a roof onto that?
any input is appreciated as i try to sort through the technical details.
thanks!
my other questions are:
1. would you adjust the triangular support for a wider span? what's an appropriate size and material?
2. which pieces should be pressure-treated and which don't need to be?
3. any tips on the roof? would you attach to the tree? or bolt 4x4 posts to the floor frame and build a roof onto that?
any input is appreciated as i try to sort through the technical details.
thanks!

jatanat
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