Burnham
Woods walker
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- #26
Neat, Burnham. How did the wire rope fit into the system?
I reckon you're referring to the Blueline rigged to the rescue 8 in the 5th pic of the first post? That's a hard lay three strand...old school climbing rope converted to rigging use. It's the same thing as Goldline, which more folks may have heard of. It's stretchy as hell, rotates under load, and is hard to knot well until it's really broken in, so not too good in applications where those characteristics are undesireable to your rigging needs. On the other hand, it's strong and very abrasion resistant, and because it's stretchy, fights above it's weight class in taking shock loads.
As I recall, we used it as one leg of the haul out/back control line. I cobbled up a 3:1 or 4:1 (I don't recall which at this point) MA micro pulley block and tackle on a prusik loop to tension that line in haulback position prior to taking the load of the top and short logs...that overcame some of the issues with the stretch. We used the r8 to lock off the tensioned line. Once we'd transferred all the load to the zipline, we'd pop the lock free and send the piece down the zip.