I have made this rather large structure mounted on logs. It's a pig farrowing duplex! Two farrowing huts in one structure. And since it is mounted on three logs, I can drag it around with my tractor. At first I thought I would drill a hole in each log and put a bit of cable between the logs. The tractor could then hook a chain up to cable. I would get a fairly equal pull on all three logs. When I looked around the shop, the only cable I had was pretty small. I didn't think it would hold. And then I found some rusty, bent, frayed 3/4 inch cable. I cut a piece to about the right size and then welded some scrap metal to one end. After a half hour of grunting I managed to get all the bent spots unbent enough and all the frayed stuff through. I then looped it back and put a U bolt on it. That U bolt wasn't cheap. And now I'm out of old 3/4 inch cable. And I have another farrowing duplex to build. I got the idea that I could get a piece of rebar through the holes. Maybe I could bend one end and weld something on to make a "T". And then thread the other end. I have a tap and die set. And a big nut probably isn't going to cost that much. Then I got to thinking that I have a four foot long piece of threaded stuff. Why not use that? I can picture it breaking in a heartbeat. I can see the rebar bending, but not breaking. A softer steel I guess. But would a soft steel hold a thread well enough? What do you guys think?