balance point rigging

Good quiet looking work. Great job. Time and a place for each tool in the bag. Enjoyed watching you not bang up the trees around. I like to add a bunch of looped sling beeners and snap the load line in all the way up the main stem to reduce the strain on the main spar. I certainly agree that groundie controls almost if not all the shock load potential. Butt hitching does not create shock load. Sketchy groundies do. Great work!
 
Sometimes shock loading is unavoidable in close proximity to a target, and the equipment as well as the climber needs to be able to take it without failing in those situations.

jomoco
 
Id rather balance heavy wood and see it drift away rather than tip tie or but tie and see the wood move all over the place.
We all done crane jobs,Yeah? Operator always puts a bit of weight on the lift,tries to estimate weight of soon to be cut limb so as to eliminate shock on crane??Surely you can use your tree winch to pre tension limbs before you cut them (basically simulating a crane pre tensioning before cut-same principle).Obviously, your pre set rigging has to be up to scratch first.
 
To reduce shockloading of butt-hitched rigging on removals, I like to not snap/ hinge cut when I can get away with it. I will top-cut large branches, let them hinge down on the lower holding wood. They may tear off, but often don't, esp. hardwoods. When it it hanging vertically, I finish cutting the holding wood and lower. I use this also to put some conifer limbs right onto the speedline by hanging them first, tightening up the speedline, then finishing the cut. Of course, beware of the forces.

I like the BPR techniques, and keep them in my bag of tricks and have been using them. Thanks for the discussion.
 
That is fair, and hear we are / were saying to let the load moving on the hinge to set the rope tension or finish setting the rope tension itself; so hopefully at tearoff to have the same effect of the line tension force fairly equaling the load force.

As far as not facing/ all backcutting; it is safer and easier on lighter stuff. The line tension in rope can make the load tension on hinge lighter.
 
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As far as not facing/ all backcutting; it is safer and easier on lighter stuff. The line tension in rope can make the load tension on hinge lighter.

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Agreed, I could have specified this more. Thanks for pointing out the safety considerations. I was figuring that the BPR technique dictated a certain level of understanding, but that was an ASSumption. Good to clarify. Thanks.
 
There was no room to let many of these pieces run. I had to either go smaller or control the shock loads with the rigging..

the drop at the 3 minute mark shows the classic near balance point scenerio. Piece tied off slightly tip heavy. Lowering line is pre-tensioned by groundies. Climber cuts hinge and topcut (backcut), shuts the saw off and then calls down for groundies to let the piece down. Piece will not move until groundie lets it down. Piece stays on hinge until all the weight is on the rope then at seperation, it barely moves, just floating right there below the climber.

The next cut shows shows the technique mentioned by soutsound.. just letting the piece slowly rip down into the rigging.. piece was hanging verticle at seperation. Making that cut back into the shoulder tends to reduce splitting on larger limbs
 
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