"Don Foreman" wrote

If I got me sums right,
looks like you should be in good shape. I figure a 1/2" dia top pin
will see shear stress of about 4000 PSI, again very modest for steel.

Well, just looking at it, and having hands on experience with lots of
"stuff", I think it will be fine, too.

I put a picture of the cabin corner in the mailbox with the name davithoist.
I am going to go out and take another of the actual contraption and post
that, too. If you CAN go to the mailbox and view this picture, you will see
that there is a 34' composite beam, but it only rests on 8x8 posts that are
mounted directly to the deck and rafters.

This will be the weak point, pulling laterally on that beam. But, if I keep
the load low, there should not be enough lateral stress to even approach
critical mass. I have thought of putting in a stabilizer bar, but thought
I'd wait to see how it worked first.

Steve