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Work Photos
The ivy-covered English walnut that was scaring the neighborhood is now gone. I cut the vines two months ago so they would start dying back. Used a lift to cut most branches, rigging larger segments that were over fences and cable line. That left a backward-leaning stem to fall using rope...- Dan Thornton
- Post #3,605
- Forum: General Discussion
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Work Photos
Wow!! What ropes did you use for this maneuver, especially for the highline?- Dan Thornton
- Post #3,595
- Forum: General Discussion
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Guy rope angle for side lean pull over
Guy line needs to be attached to the falling tree higher than Center of Gravity to avoid that potential disaster!!- Dan Thornton
- Post #23
- Forum: Rigging and Roping
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Decision Point Approaches
Agree totally. Over my lifetime, simply not making any big decisions when 'down' has been critical. Knowing it's a matter of time (or exercise or rest or safe people ...) lets me wait it out. Only one time did it last so long and so deep for me that I went for professional counseling, and that...- Dan Thornton
- Post #40
- Forum: Behind the Desk
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Guy rope angle for side lean pull over
How interesting... I minored in music in college. With additional minors in Greek and Hebrew. But always liked math. The great mystery is why I enjoy working in trees so much, as a retirement gig! I joke that it will either keep me in shape, or it will kill me. I'm quite determined to avoid the...- Dan Thornton
- Post #13
- Forum: Rigging and Roping
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Guy rope angle for side lean pull over
The principle is simple, but the application may not be generally practical. 1. For every one degree that the guy line anchor is LESS than 90 degrees from the intended lay, the guy line anchor would need to be one degree HIGHER than the hinge to compensate. 2. For every one degree that the guy...- Dan Thornton
- Post #8
- Forum: Rigging and Roping
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Guy rope angle for side lean pull over
Here are five variables that are good to think about: 1. height the guy line is attached to the falling tree: Higher = more control. 2. distance from the tree to the guy line anchor: Farther = more control. 3. tension of guy rope: Tension should equal the leaning force of the tree in the...- Dan Thornton
- Post #3
- Forum: Rigging and Roping
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Throw line tricks and tips learned over the years
I discovered a new trick (for me) yesterday in double-bagging. I was starting another day in a job that included dead-wooding 24 white pines. So happy - very first Big Shot toss was PERFECT! Exactly over the high crotch (TIP) I wanted, but of course throw ball kept sailing high in a second...- Dan Thornton
- Post #61
- Forum: Climber's Talk
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Work Photos
Thank you very much for the explanation.- Dan Thornton
- Post #3,574
- Forum: General Discussion
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Work Photos
Would you explain the haul-back line?- Dan Thornton
- Post #3,571
- Forum: General Discussion
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Today....
The chestnut tree roots are still living! Shoots grow and may get as much as ten-feet tall but die before maturity. I saw many of them on the Appalachian Trail. They used to say that a squirrel could jump from chestnut tree to chestnut tree from Tennessee to Vermont without touching the ground.- Dan Thornton
- Post #4,454
- Forum: General Discussion
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Bend radius for rigging
I apologize that my diagram of the highline forces sent this discussion in the wrong direction, I'll take the risk to add another diagram. Corrections will be much appreciated. First, rigging forces are NOT like highline forces. That is because the rigging line goes THROUGH the hitch. The...- Dan Thornton
- Post #78
- Forum: Rigging and Roping
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Garage sale of items
I'll take the Petzl spin and the ISC block. Will send DM.- Dan Thornton
- Post #7
- Forum: TreeBay
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Bend radius for rigging
It appears there is a difference between pressures on deadeye slings and forces on highlines. Below is a chart for crane work with choking slings. Forces don't appear to be nearly as extreme as for highlines. Muggs, your definition - "Deflection is a tensioned rope between 2 anchors, being...- Dan Thornton
- Post #49
- Forum: Rigging and Roping
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Bend radius for rigging
The above math makes a LOT of assumptions in areas where I am ignorant. The numbers are based on forces of highlines and hammocks. I found two more diagrams (below) that illustrate. However ... does the friction at the tie-off diminish these forces? I sure love using an ultra-sling with a...- Dan Thornton
- Post #45
- Forum: Rigging and Roping
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Bend radius for rigging
If the block is tied tight to the tree stem the forces get large quickly. And don't we all want to tie it as tightly as possible??? In setting up a hammock, some people try to tie the hammock straps as tightly as possible to the trees. This is a huge mistake. Ideal is having the hammock straps...- Dan Thornton
- Post #41
- Forum: Rigging and Roping
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Today....
Not L. Tulipefera (tulip poplar). I believe they are Populus 'x canescens' (gray poplar). Planted as a hedge 30 years ago - not the best choice for a hedge. I'll have to look closer to see if there is special reason for their decline other than old age.- Dan Thornton
- Post #4,379
- Forum: General Discussion
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Today....
Here are six of nine dead and dying poplars I'm removing.- Dan Thornton
- Post #4,374
- Forum: General Discussion
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More thoughts on the finer details of rope walking ascents
I figured you had many years of thinking about this, which is why I asked ... You put in words what my mind had yet been unwilling to accept. It's impossible to relax totally, since my body has to be behind the taut rope. Your description - "basically a 'C' shape" - reminded me of one of my...- Dan Thornton
- Post #13
- Forum: Climber's Talk
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test
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Light 14 or 16" narrow kerf bar for 200t or 201t- Started by southsoundtree
- Replies: 9
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