Badd GT
forum member
If your joists are running the 8 ft direction use 2x8. It’s better to notch(seat cut) your posts but you’d want to use a 6x6 to do that. With a 4x4 and tree fort you would probably be fine just lagging your band to the 4x4 w/3/8 lags or carriage bolts if you like and bolting some solid blocking under them.the 16’ span will need posts on the corners and 2 more on the span (total of 4) so, when it’s all done 10 posts. You could make your band out of 2x8 and joists 2x6 running 8’ direction and just nail a 2x2 under the 2x6 as a ledger, nice and easy!
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