In reply to Removed User:
Like the above I'm also a tree surgeon.
If you're insistent on doing it just be mindful:
- Different tree species behave very differently. Eucalyptus can be both snappy and stringy for example. Be careful trusting it. How thin is safe is dependent on a wide range of specifics. If in doubt, go thicker.
- When cutting, on the smaller stuff make sure you use step cuts and hand remove. Fell out the bigger bits with a gob and back cut. Never cut straight through the branch from top to bottom. All species (especially Eucalyptus) will snap and peel way before you finish the cut. This will result in branches twisting and peeling off, falling totally out of control, hitting you, and/or getting tangled in your rope systems forcing open devices. If you're anchored below the intended cut onthe branch that peels then you're going to get something trapped. It'll also leave a big wound damaging the tree.. Eucalyptus is pretty heavy per unit volume so don't underestimate the forces involved even on smaller bits. Wear a helmet.
- Set up two independent systems to protect against both rope and anchor failure.
- Take extreme care with your saw and your rope. Under tension a thin rock climbing rope will cut faster than you can say 'oh shit'. This is why arb ropes are massive and we use two of them. Never make a cut near your rope.
- Never cut out of balance. Never rush.
- Never cut anything that you think will hit your ropes. Sods law states that even the smallest touch will end up sending the branch rocketing down to your harness.
- If you're going to be moving around a lot, rig up a cambium saver on each system to save the tree (and your ropes) and to remove (what can become significant) friction.
- Try to set up your systems such that you can get out of the tree and down to floor with one hand immediately if you get injured or something goes wrong.
- When it comes to pruning specifics, all depends on species and reason for pruning. But in general, if you're in doubt, use the 1:3 ratio.
- Let someone know what you're doing.
Good luck. It's definitely possible. All depends on your attitude to risk and the size of the job. If it goes well you'll wonder what the fuss was about. If it doesn't... well you'll see why arb insurance is so expensive!
Post edited at 11:58