Thanks to Martin for putting this together.
There are nearly as many ways to rig a slackline as there are slackliners. This is the way I do it to keep the line as flat as possible while using a small number of biners to keep the system nice and light.
DON’T make a highline with this
Basically, this is an Ellington system with a secondary 3:1 pulley. With the combined systems — and an added trick — I can setup a line between trees 50′ apart on my own. Here’s a gear list.
- Make an anchor by wrapping your loop of webbing (made with a water knot) around a tree and clipping a carabiner through the two ends.
This is not the best anchor, but it gets the job done. Here is an alternative.
- To connect the main line to the anchor make a line locker by passing a loop straight through the chain ring then passing it through again.
- Clip this in to the anchor.
- Walk the webbing towards the other tree ensuring that it remains flat with no twists. Put a second line locker in the line leaving a space the size of about 20% of the total distance between it and the other tree. The tail end of the webbing should hanging down from the locker.
- Make another anchor, then pass the line up through the biner.
- Now run it back down through the first carabiner. Don’t pull the line tight just yet — just enough so it’s off the ground and doesn’t flop around like a wet noodle.
- Start a second loop by going under the webbing on the other end. This can be accomplished by giving a slight pull on the outer loop while sliding the webbing of the inner-loop-to-be along the spine of the biner.
- Now finish the second loop by going under the webbing on the first biner. This is the completed tensioning/cam system.
- Pull the line somewhat tight, but leave plenty of slack to adjust your anchors to your desired height (and so they lie flat) and put in tree protection.
- Now pull with all your might, but keep a steady tension and don’t jerk it. When you’ve done all can, set up a second anchor to add more mechanical advantage. Girth hitch a biner (see insert) on the the line as close to the camming system as you can. This will be the moving biner.
- Run the line through the secondary anchor,
- then through the girth hitched biner.
Now the pulling will be much easier. Pull what you can and when the two biners touch, take out the girth hitch and put the `moving’ biner back in the line next to the camming system. Repeat to your heart’s content.
- To make the pulling even easier, girth hitch a rap ring (or biner) in the the line, and pass a sling through to make a double handle.
- After removing the 3:1 pulley system, fold the tail end of the webbing down right next to the caribiner. Then pull back to get the webbing out from the camming system
- If you have serious tension in the line, you will likely not pull the webbing all the way out. Next, take a loop of webbing and pass it up through the biner (this will save your fingers in case the webbing decides to pop out all of a sudden!). Now you’ll be able to pull it out the rest of the way.
Repeat with the other side.