Port a wrap spliced onto a loopie

[john.massing]

Has anyone seen a port a wrap spliced onto a loopie sling? I have seen port a wraps girth hitched on loopie slings before. I wonder if it is stronger to be spliced onto the loopie than to be girth hitched on to the loopie. Thoughts?

 

[Matias]

Has anyone seen a port a wrap spliced onto a loopie sling? I have seen port a wraps girth hitched on loopie slings before. I wonder if it is stronger to be spliced onto the loopie than to be girth hitched on to the loopie. Thoughts?

Before I learned how to splice, I called Wesspur to order something like that. but they recommended against it, though I forget why Dave said not to.

 

[evo]

You get no applicable strength gain in theory. Yes a girth will loose strength but there are two legs of rope sharing the load reduction. So a girth would have to derate the line by more than 50% before splicing it straight would be useful, and even then it would be a purpose only kinda thing.
It’s a miss conception based on the configuration of rigging, like crane rigging with endless loops. There in a basket you get x2 the single leg, if you girth you get a reduction of about 80% of the basket configuration or 180% of a single leg. (ball parking it to articulate)
A choked endless loop is a girth, and can see significant reduction VS an endless loop, but that is not how Loopies are used. Girthing the porty wouldn’t give any lessor strength.
If you need a very strong connection a long dead eye in a wrap 3 pull 1 with a cats paw to close it is about as strong as you can get, other than wrap a shit ton and pull a few. Such as wrap 5 pull 2..

 

[Friedrich]

also you loose versatility or atleast it would‘nt be as clean when using it shackled to a truck or whatever

 

[john.massing]

You get no applicable strength gain in theory. Yes a girth will loose strength but there are two legs of rope sharing the load reduction. So a girth would have to derate the line by more than 50% before splicing it straight would be useful, and even then it would be a purpose only kinda thing.
It’s a miss conception based on the configuration of rigging, like crane rigging with endless loops. There in a basket you get x2 the single leg, if you girth you get a reduction of about 80% of the basket configuration or 180% of a single leg. (ball parking it to articulate)
A choked endless loop is a girth, and can see significant reduction VS an endless loop, but that is not how Loopies are used. Girthing the porty wouldn’t give any lessor strength.
If you need a very strong connection a long dead eye in a wrap 3 pull 1 with a cats paw to close it is about as strong as you can get, other than wrap a shit ton and pull a few. Such as wrap 5 pull 2..

I just had a break test on a loopie in the configuration of being dedicated to a port a wrap and it broke at 154% abs. It will definitely be dedicated once on the sling and that is the type of info I am looking for. I am looking for reasons not to do this. Thanks.

 

[Muggs]

Even though loopies are stronger than whoopies or deadeyes, I still wouldn't use them for a porta-wrap. They are a pain to adjust on bigger diameter stems. I would just bump up my cordage size and use the type of slings that you prefer. I've had my old porty on a 16ft ultra sling 7/8" for years now, definitely prefer that to a smaller diameter cordage loopie.

As to the OP, I think it would depend on the bend radius of the hardware being used, whether it's stronger spliced right onto the sling or girthed on. A large porty has a decent radius...

 

[flushcut]

^I second this. I would not put a loopie on a porty, 3/4” tennex 14’ dead eye.

 

[evo]

^I second this. I would not put a loopie on a porty, 3/4” tennex 14’ dead eye.

Yup, and it would be a giant pain in the ass to closehaul the porty in a tight choke to avoid excess flop.
I actually avoid loopies for this reason. And I take versatility heavily into account. Need a stronger sling? Upsize.

 

[flushcut]

I like loopies for my 1/2” blocks but bigger than that it’s deadeyes.

 

[RyanCafferky]

I think the main reason not to do it has to do more with how the human mind works than how rope fibers work and or break. If Wesspur or any other purveyor of tree gear sold portwraps with spliced slings on them, how often would those slings be replaced? Never. At a certain point we would start hearing about struck by incidents from failed portawrap slings. If a sling can’t be replaced except by someone who knows how to splice, it will never be replaced. I’m a very capable splicer and even I push it at times on replacing dead eye slings.

I have one portawrap with a sling spliced to it and it is a mini portawrap. And half the times I need to use that portawrap I don’t want the sling on it because I’m using it instead of a knot in an Amsteel rope.

So you want reasons not to splice a sling on it?

1. Safety. Unless you have a very proactive replacement schedule for slings on hardware it is a bad idea. It is still a bad idea just because at a certain point it may leave your quiver and become someone else’s portawrap who doesn’t splice…

2. Reduced versatility. A portawrap can be placed in a pintle hitch and used for applying force to a line in felling operations. A spliced sling on it impedes this or completely negates this possibility.