Rigging krab idea.

[Mark_Skyland]

4 hours ago, kram said:

Yeah very easy to splice 3 strand.

 

 

That brings an unrelated question. If one looks in shops at rigging ropes, all of the spliced onces have very large eyes - much bigger than a biner. Whats the intended purpose or reasoning?

@AHPP ?

 

The reason I ask, I might splice one end of this,

 

One end for biner and slings, other end for knotting. Any reason not to be a normal small eye like a climbing rope?

Interesting question, Ill ask a couple of rope manufactures. I always presumed that it was more difficult to make a small eye splice therefore more expensive. 

 

I don't know if there are any regs on the size of a spliced eye on PPE climbing lines as they all seem to be very tight.

 

[Joe Newton]

12 hours ago, Mark_Skyland said:

Interesting question, Ill ask a couple of rope manufactures. I always presumed that it was more difficult to make a small eye splice therefore more expensive. 

 

I don't know if there are any regs on the size of a spliced eye on PPE climbing lines as they all seem to be very tight.

 

Climb line splices are generally tighter to keep the splice somewhat captive on a carabiner. There is no benefit for a large eye.

 

Most decent manufacturers use a "thin splice" to aid in installation of non mid line attachable devices (ZIG-ZAG) and for the effective retrieval through modern cambium savers where the traditional double braid splice would interfere.

 

As far as the regs go, they need to meet the relevant EN criteria

[Mark_Skyland]

19 minutes ago, Joe Newton said:

Climb line splices are generally tighter to keep the splice somewhat captive on a carabiner. There is no benefit for a large eye.

I understand the captive bit but some of them really tight! We've had the odd customer complain about it.

[Rich Rule]

5 hours ago, kram said:

Yeah very easy to splice 3 strand.

 

 

That brings an unrelated question. If one looks in shops at rigging ropes, all of the spliced onces have very large eyes - much bigger than a biner. Whats the intended purpose or reasoning?

@AHPP ?

 

The reason I ask, I might splice one end of this,

 

One end for biner and slings, other end for knotting. Any reason not to be a normal small eye like a climbing rope?

If the spliced eye on a rigging line is large.

 

I was told the larger the eye the more material is available in the even of shock loading.  Similar to a rigging system, the more rope the system the more stretch is available when it gets shock loaded.

 

Large splices in dead eye slings are for similar reason.  The added advantage is when uou cow hitch or tie off, the throat of the splice is not directly in the knot.

[kram]

1 hour ago, Mark_Skyland said:

I always presumed that it was more difficult to make a small eye splice therefore more expensive. 

The process is exactly the same for any eye size, large just uses slightly more rope.

 

 

50 minutes ago, Rich Rule said:

 

I was told the larger the eye the more material is available in the even of shock loading.  Similar to a rigging system, the more rope the system the more stretch is available when it gets shock loaded.

 

I dont believe a couple of inches in the eye will make any difference for a rigging line.

 

 

Edited 13 hours ago by kram

[Mark_Skyland]

17 minutes ago, kram said:

The process is exactly the same for any eye size, large just uses slightly more rope.

 

 

 

True but maybe you need to be more precise when splicing a smaller eye so it may take more time, I don't know. There are plenty of splicers in this forum. Maybe they can explain if its more difficult to splice to a specific size.

If they do mess it up then that's a lot of wasted time and rope.

 

[kram]

Marking ropes is not very precise to begin with but you learn the sizes for each rope and marking is seconds. I like to use thread instead of marker pen. A biner eye on 8-10mm prussik cord might be 62-65mm but 72-77mm on thicker climbing rope, if I remember.

 

I've messed up a couple but so far eye sizes have been dead on. I had a lock stitching needle eye snap and get stuck in a splice, that caused some swearing. Cut it off and started again.

[Rich Rule]

10 hours ago, kram said:

 

 

 

I dont believe a couple of inches in the eye will make any difference for a rigging line.

 

 

Well, that doesn’t surprise me at all that you don’t believe what the industry has learned over god Know how many years.

We should all bow down to your superior knowledge on this subject you have gained from 5 minutes of experience,

 

A couple of inches would be for a small spice.  A eye in a rigging line could be 9 inches that would mean at least 18” and some to form the loop and burry.

 

 

 

[Rich Rule]

9 hours ago, Mark_Skyland said:

True but maybe you need to be more precise when splicing a smaller eye so it may take more time, I don't know. There are plenty of splicers in this forum. Maybe they can explain if its more difficult to splice to a specific size.

If they do mess it up then that's a lot of wasted time and rope.

 

Doesn’t really matter the size mate.  It is just a different measurement for the eye size when you are marking g and preparing the rope.  
 

The technique is pretty much identical.

[AHPP]

What’s the answer then, Rich? Why do rigging lines have bigger eyes?