Just to update this thread, we completed the 250 feet of steel cabling today by lashing the two ends together using these cable clamps:
To keep the cables from cutting into the trees, and to allow the trees to grow outward, we put up a series of these wooden standoff blocks:
You'll notice that we doubled the cables as they wrapped around the trees so that the strength is always two time 14,000 pounds, at all times:
Here, you can see the two cables, hanging as two catenaries, from which we will hand the suspension bridge:
We're starting to get used to working in the heights, as you can see by this photo of my neighbor coming down from disentangling the lines:
As you can imagine, we wear harnesses and we have static lines hanging from all the trees, as you'd be amazed how many times you need them:
In fact, my unenviable job today was to stand at the TOP of this ladder and position the cables, which I did with two hands on the cables so I had to be wearing a harness or I would have fallen off in no time:
I'll let you know when we drill the redwoods to put in the tree bolts, which will anchor the house; but first, we're working on the suspension bridge (you can see our cargo netting in some of the pictures above).
Tomorrow we're putting up WiFi on a neighbor's roof, so we wont' be working on the treehouse until next week.