Splice testing?

[dtreez]

Still new to splicing, but would like to send some of my splices to a lab to break them and see how they did before I feel confident using them for climbing and rigging. Anyone know of any such labs in the greater Philadelphia area, or near the east coast in General?

 

[Reach]

There’s one or two around, but I forget for sure who they are. American Lifting Products may be able to help you. Give Ray a call at Gap Arborist if you know him, I’m sure he will tell you who he uses - I used to know, but I forgot…

 

[Quintanana]

Arbsession is good

 

[JohnTheSplicer]

Arbsession is good

In fact our break testing machine is being calibrated as we speak!

 

[Quintanana]

Noice! Got a batch almost ready to send out to you guys. Some 5/8” slings included!

 

[dtreez]

In fact our break testing machine is being calibrated as we speak!

That's awesome! How long do you need sections of rope to be for testing?

 

[Boconnor303]

I've tried treestuff and a few others, but have settled on arbsession. They've reached out to work around issues and have been extremely pleasant to deal with. Not to mention I think they run the cheapest and quickest service around.

 

[JohnTheSplicer]

That's awesome! How long do you need sections of rope to be for testing?

For spliced climb lines we recommend a length of 12'. This allows us enough rope to wrap on our capstan fixture. Which allows a true test of the splice as there are no other variables present. Hitch cords (eye & eye) will be tested in a straight pull and can come in any length under 42".

We can and have used ropes under 12', but it makes the testing less accurate.

 

[dtreez]

For spliced climb lines we recommend a length of 12'. This allows us enough rope to wrap on our capstan fixture. Which allows a true test of the splice as there are no other variables present. Hitch cords (eye & eye) will be tested in a straight pull and can come in any length under 42".

We can and have used ropes under 12', but it makes the testing less accurate.

Have shorter lengths consistently broken at lesser loads, or is it just inconsistent data?

 

[JohnTheSplicer]

Have shorter lengths consistently broken at lesser loads, or is it just inconsistent data?

Our testing system requires 8 wraps on the capstan (roughly 12') for it to test the rope and splice accurately. So it is more of inconsistent data than the lengths breaking at lesser loads. Less than 12' adds the variable of our knots while 12'+ just has the variables of the rope and the splice.

 

[Brocky]

Our testing system requires 8 wraps on the capstan (roughly 12') for it to test the rope and splice accurately. So it is more of inconsistent data than the lengths breaking at lesser loads. Less than 12' adds the variable of our knots while 12'+ just has the variables of the rope and the splice.

Are you able to test just a piece of rope without tied or spliced eyes, thinking mostly of dynamic ropes that don’t list a break strength?

 

[arbsessionsplicing]

Are you able to test just a piece of rope without tied or spliced eyes, thinking mostly of dynamic ropes that don’t list a break strength?

Yeah! We have the option to place a bollard on each side and pull a piece of rope without terminations. Our bed has a 6ft pull length. We haven't run into a rope so dynamic that it can't be tested when set up properly but that's something to keep in mind.

 

[Brocky]

Thanks, do you recall what the Swift Protect Pro broke at without terminations?

 

[arbsessionsplicing]

Thanks, do you recall what the Swift Protect Pro broke at without terminations?

I just looked it up in my records. The Swift Protect Pro testing averaged out to roughly 4100lbs without terminations.