Rope Bridge Breaks

[Rocks_and_Trees]

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As long as we're on the subject of bridges, I cannot overemphasize the necessity of threadlocker on the shackles. I've also had a shackle fall off, again at height after a long FL... sometimes I wonder if I should be in a different line of work, my luck isn't good.



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I aced those shackles long ago and just started tying on to hard plastic thimbles. I just feel better (safer) and it lightens things up nicely. They hold up really well, but I am only 140lbs. I guess some don't like the tied bridge, but it works for me. I dunno.

http://www.treebuzz.com/forum/showflat.php?Cat=0&Number=262874&an=0&page=0#262874

 

[mattwisconsin]

Nick, that's exactly what we thought (regarding the conduction). Sounded absurd.

 

[unatool]

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I noticed it because the rings stopped sliding (I ride two). I assume it had been way understrength for a long time.

I had terrible luck with webbing bridges. I use two small rings instead of one big one and they wore out super fast, that's why I made my own. I'm not sure if it was the rings but I can't think of another reason.

The big take away on ALL these bridge failures is... THE SPLICING DID NOT FAIL, the material did.

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I found these parts of Blinky's post interesting...

After wearing-out 3 bridges, I attached a Petzl 'mouse ear' pulley to my rope bridge. I also tried 'glide' pulley from Sherril's and the shackle pulley. A friend of mine uses a hitch climber on his rope bridge...

Does anyone else prefer a pulley on their rope bridge? It makes more sense than the ring?

 

[classictruckman]

I use a hitchclimber on my glide. I can't see using a ring, after kong's notorious unmarked rings and all these material failures.

 

[Maui Palm & Tree Care]

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I use a hitchclimber on my glide. I can't see using a ring, after kong's notorious unmarked rings and all these material failures.

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from what tom told me, the rings at sherrill tree are pretty good and reputable. i forgot the name of the company but they are from italy and are most certainly not kong.

 

[TimberJack]

Here's a question for Nick, John, and Rich. Feel free to answer what you feel is approiate. What kind of liabilty insurance do your companys carry for this kind of tragedy? What kind of liability does the manufacture of the rope assume selling their products to as a whole sale scenario knowing that your workmanship (splicemanship) may greatly effect the products reliablity? In some cases I understand you may not be able to answer, but hope you can be as honest as possible.

 

[TreeStuff]

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What kind of liability insurance do your companys carry for this kind of tragedy?

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Having sold his products and having asked the same questions myself... I can tell you that Rich of ABR has a specific type of liability insurance that covers him up to one million dollars per individual incident.

The insurance premium is insanely expensive (but entirely necessary) and of course is a significant part of the retail cost you pay per splice.

I'm sure Rich can share more details with you if he chooses.

 

[treebing]

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I use a hitchclimber on my glide. I can't see using a ring, after kong's notorious unmarked rings and all these material failures.

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how do you attach to the hitch climber? doesnt everything get oreinted wrong? CMI makes the glide pulley which seems it would be right.

 

[classictruckman]

That all depends on your climbing style, right now I like it, a carabiner on the spliced end of my rope and another on my VT with the tail coming out to my right side.

 

[unatool]

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how do you attach to the hitch climber? doesnt everything get oreinted wrong? CMI makes the glide pulley which seems it would be right.

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quick example of bridge pulley orientation:

 

[classictruckman]

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how do you attach to the hitch climber? doesnt everything get oreinted wrong? CMI makes the glide pulley which seems it would be right.

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quick example of bridge pulley orientation:

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You can see it here at the very bottom of the photo

 

[unatool]

classictruckman- Yes, we are orientated the same. I ended up with the 'mouse ears' pulley because that was what I had laying around...
I find it weird to use the ring, like the carabiner is the wrong way...

Anyway, back to the thread. Does it help to use a pulley (rather than a ring) to spread the forces upon the bridge? I think so.