Stein Dual 'Impact loading'

Re: Stein Dual \'Impact loading\'

If I'm not mistaken, it appears that in the 15th picture, the two rigging lines are connected to one additional line handled by the roper, giving equal (or as close as possible) load to the two rigging lines.

Reg has showed this in another thread with another tree, not my deduction.
 
Re: Stein Dual \'Impact loading\'

it also reduces the shock loading in more ways than one, reg recomeds joining the lines using a prussic/ klemheist on his video if my memory serves me
 
Re: Stein Dual \'Impact loading\'

Grover, the support line in the adjacent tree made it possible to rig such a proportionally large top.
Those particular ground-workers know their stuff. They know where to stand, how to organise/position the line, and what to expect. Steve has been a climbing arborist since the 70s and Gav has worked for him for about 10+....relatively speaking, they were never in Danger.
I devise a strategy based on what I know, who I am, and those that I’m working with....like anyone else I try to make the best of it.

SouthSoundTree, I have lots of ropes and slings for different types of jobs....they take up half the garage, I get sick of looking at them.

EMR, no I haven’t. But I’m confident the load-sharing is 55/45 at worst.

Treezybreez, SStree and Mike pretty much answered your question(see attachment).

Chopper, your avatar is something else!
 

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Re: Stein Dual \'Impact loading\'

[ QUOTE ]
Grover, the support line in the adjacent tree made it possible to rig such a proportionally large top.
Those particular ground-workers know their stuff. They know where to stand, how to organise/position the line, and what to expect. Steve has been a climbing arborist since the 70s and Gav has worked for him for about 10+....relatively speaking, they were never in Danger.
I devise a strategy based on what I know, who I am, and those that I’m working with....like anyone else I try to make the best of it.



[/ QUOTE ]

Cheers Reg, nice explanation of the job and situation.

Its very difficult to comment on pics or videos of treework without having the knowledge of what the job was like in reality. I sometimes feel there is very little that can be learned from internet tree forums.

Ray Mears the bushcraft expert and survival specialist once said, 'There is nothing to be learned from sitting at a computer screen, if you want to learn - you have to experience a situation first hand to truly understand it' I agree with him.











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Re: Stein Dual \'Impact loading\'

Way to show the boy scouts what can be done.. Big, is faster AND safer when you know what you are doing... I was surprised that you didn't use double lines on the first top. That looked plenty big and heavy.. with the added distance fallen seems like there was at least as much force involved in rigging the top as on the wood.. What type of rope was used.. hope it had some stretch to it.. Looked like double braid..
 
Re: Stein Dual \'Impact loading\'

[ QUOTE ]
Way to show the boy scouts what can be done.. Big, is faster AND safer when you know what you are doing... I was surprised that you didn't use double lines on the first top. That looked plenty big and heavy.. with the added distance fallen seems like there was at least as much force involved in rigging the top as on the wood.. What type of rope was used.. hope it had some stretch to it.. Looked like double braid..

[/ QUOTE ]

Dan, sometimes even experienced guys get spooked when a big top folds from vertical to horizontal....only at which point do they see its true extent. In that instant people can instinctively grab at the rope, which will initiate the shock-load, the situation then turns very bad. Sounds a little contradictory from my earlier reference to the two particular gentlemen involved, but one must still consider all eventualities.

They had 3 wraps on a single 3/4 portland braid, to decelerate it, not to bring it to an absolute halt....that was my instruction. The logs were probably heavier, of which we did had to bring to a halt, hence the double lines....although the leverage on the stem was much less by that stage. Thanks
 
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