Strongest Block Attachment Sling

I don't use Amsteel for slings because of the low melting point. Like moray said, the sling disipates very little energy anyways.

For the record, I say I match the loopie's diameter with the load line's diameter. I rarely use dead eye slings.
 
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I don't use Amsteel for slings because of the low melting point. Like moray said, the sling disipates very little energy anyways.

For the record, I say I match the loopie's diameter with the load line's diameter. I rarely use dead eye slings.

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I would not base strength on diameter for proper rigging system design.


I would base it on strength. Double the line's capacity for the anchor sling capacity, using appropriate efficiency reductions for hitches/ knots/ splices.
 
So Norm are u suggesting that we should not be using AmSteel in a block attachment sling application? And is there that much friction in a stationary hitch that melting point becomes a factor?
 
I've been using the 1/2" amsteel on our blocks for over 2 years now, not a single one has any melting areas on it.

when you untie the knot sometimes, if it was REALLY pulled on it during it's work use, it fools you at first, looking like it might be melted, but it's just compressed tight and the spot goes away with a shake of the sling.
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I don't think anything should be knocked unless you have actually tried it and put it into work to see for yourself. Don't take what you think you know about it, and say it's no good to use just by what you hypothesize might happen.

Maybe they can melt, I just haven't seen it happen in the 2 years yet though.
 
I have experienced zero melting as well and found the amsteel almost a joy to work with but the way it sounded thought maybe I was missing something so thought I'd ask. never know what bad experiences are lingering out there
 
Check out this sling, Tenex 3/4(with a dash of puppy). This thing melted like this during routine rigging ops. Granted the ground guy was a little off this day. It was just a couple of 18" 3 footers of ash. Rope was through two blocks with 90 degree rope angles, pretensioned rope and all. 5 degrees out too.
 

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I've been using the 1/2" amsteel on our blocks for over 2 years now, not a single one has any melting areas on it.
I don't think anything should be knocked unless you have actually tried it and put it into work to see for yourself. Don't take what you think you know about it, and say it's no good to use just by what you hypothesize might happen.


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I even use tenex never had a melting issue. I have to agree with Xman here.

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Check out this sling, Tenex 3/4(with a dash of puppy). This thing melted like this during routine rigging ops.

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First I'd wonder about the knot used to sling? Tight, snug, lose, if slack and roper run stops the load I can see it melting. Heck even normal rope slings will melt under such use.

I am now in the process of using Amsteel coated, I just spliced up my first eye sling. Used it for one week now. After 3 weeks of use I plan to pull the core see if any uglies have happened. Thinking this will be my future block slings.
 
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So Norm are u suggesting that we should not be using AmSteel in a block attachment sling application? And is there that much friction in a stationary hitch that melting point becomes a factor?

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I'm just stating the fact that Amsteel Blue has very very low stretch. I personally wouldn't use it as a block sling. I'm a double braid fan for arborist block eye slings in rigging senarios. Loopies for re-directs and over head rigging only. I want to incorporate all the 'give' I can in rigging. Research has shown, the better shock absorpsion there is in a rigging scenario, but safer the climber is.
I did make an eye sling out of 1/2" Amsteel and attached it before I made my notch (for a drop hitch). The muffler on my chain saw melted the sling to the point where it was compromised. An expensive lesson learned. Of course I coulda cut the notch before the sling install. Sometimes I'm not the sharpest cutter on the chain.
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1/2" Amsteel and attached it before I made my notch (for a drop hitch). The muffler on my chain saw melted the sling to the point where it was compromised. An expensive lesson learned. Of course I coulda cut the notch before the sling install. Sometimes I'm not the sharpest cutter on the chain.
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hey that's really interesting note there!

thanks!

I hadn't thought about the chainsaw muffler being able to do that, I'll keep an eye out for it.
 
The dam muffler! I smoked my climbing line the other day. Turn the saw the other way. I do agree with Norm. Double braid for dumping wood for the same reasons.
 

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I'm with Norm on this and I can't even say why. Just something in my brain saying a little stretch is better than none.

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So, uummm, you'll be retracting this
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I use a 5/8" Tenex loopie with a 5/8" block and 9/16" Stable braid... and I don't generally push it close. I'm never in that big of a

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When you throw all those loopies out, could you toss them in a box with a shipping lable? I will pay you back the shipping cost.
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Since the sling in a lowering scenario absorbs very little energy in the first place (compared to the much longer rigging rope), the choice of sling material should have almost no effect on the maximum forces experienced by the other rigging elements. Even if the sling had exactly zero stretch, and therefore absorbed zero energy, the rest of the system would hardly notice the difference.

Using Amsteel Blue for the rigging rope, on the other hand, would make a big difference. Some part of the system has to be able to absorb energy or the forces get out of hand.


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Belive this rule.
 
Heavy Rigging Bag:

1/2" Amsteel:
2 8' loopies slings
2 8' dead eye
2 14' dead eye
2 22' dead eye
1 32' dead eye

1/2" Amsteel Blue:
2 8' dead eye
2 14' dead eye

3/8" Amsteel Blue:
2 16' dead eye
4 20' dead eye

I think thats all of them.....

5 CMI Blocks (Steel), 2 Porty's, No other rope in this bag.

Light rigging bag has webbing slings, 5:1 system, 9:1 system, biners and light pulleys.
 
Kevin, Amsteel is a great fiber for most applications, just be carefull when dumping wood. Poly is a great application for this. My biggest fear is tree failure and polyester slings are inexpensive and durable.
 
Tenex is what I use for making loopies. If you match it's diameter with the poly based rigging rope, you end up with a sling that's a little more than twice as strong as the rigging line.

Or, by matching the MBS of the 2 materials, you end up with a sling that's ~twice as strong as the rope.
 
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Kevin, Amsteel is a great fiber for most applications, just be carefull when dumping wood. Poly is a great application for this. My biggest fear is tree failure and polyester slings are inexpensive and durable.

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Considerably strong points, bud. Neither for your benefit nor mine (as we are savvy enough to engineer a rigging system) but for others try to understand my prefernce (not a universal absolute) for amsteel.

I like a bomb proof rigging point: thus employ this fibre.
I am aware of rigging forces and therefore consider the lack of stetch at the rigging point.
When at all concerned about tree failure:
- a weaker rope is employed (even volocity at times - which is an amazing light rigging line)
- rope is added to the system via redirects
- fuseable links are added

I like amsteel, and sought it out. But the volume of it in my kit, is primarily due to some killer deals on the stuff.
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