Tree Rigging: The Plan

[rowan lee]

I reckon they used the ports wrap because that's what they had.It's a simple way of tensioning and locking off .

 

Cool thanks:001_smile:, perhaps there was only one hand winch for the job. So they would have tensioned the side support first with the winch, leaving the tail for the ports wrap (I did note the use of a prussic loop somewhere in the vid which was presumably attached to the hand winch). When that was tensioned and locked off, they simply removed the winch to the next location in the garden for pulling duties on the main pull line.

[rowan lee]

Not particularly, but imagine if you wanted the pull line tied round a limb high up, you would have to throw a line up, isolate a limb, pull your rope up and back down, running bowline around itself, and pull the bowline back up so it cinched tight around the desired limb. A base tie means you can just fire your line through the crown without isolating a limb, and just pull your rope through the crown, down and tie at the bottom. A picture would be more helpful.

 

Also, throwing the line over and tying it off meand you get the maximum amount of leverage on the stem.

 

Thanks for putting it a little simpler for me. Thats a handy method alright. Cows hitch to tie off? And would it matter what side of the trunk the line ran down to tie off point relative to the felling cut?

[Stephen Blair]

Yes, if I'm using a Prussik for other stuff I put an extra wrap on it to make it more secure

[bonner1040]

We used a portawrap to take the load off the come-a-long. The pull line wasnt isolated to save time. Its much less than twice the load with the deflection and friction.

[Treeworld]

I think the evident limb failure that was already present on this tree contributed to the barber chairing of the tree by weakening the fibres in the stem so when the tree started to go its weak points inside became exposed to the pressure and failed. Luckily you had a line in it as a safety measure to keep it away from the target being the house.

 

I have used this technique clear felling leaning trees and have known it as the adjusted gun technique this is a good video for reference.

 

[ame=http://www.youtube.com/watch?v=qe8_L-0_Fso]felling side leaning tree adjusted gun technique - model - YouTube[/ame]