Flip Lines| Lanyards| Wire Core Pole Straps

JayD · 7th September 2008, 03:46 PM

Accidents are just that accidents! There not called purposes

However if l could have my choice of what accident l could have lthink l would take a nick to a cable instead of a nick to a rope.

l would survive to tell the tale.

treevet · 7th September 2008, 03:52 PM

Quote:

Originally Posted by TrevMcRev

I heard they demo'd this at Burnley and it did cut through.

My opinion is that it MUST take more effort than a rope one under load.

Yes you could cut through steel if you try to, but i still beleive a lightish nick in steel could be a completely severed rope one.

Safety blue braid, my lanyard and climbing line, supposed to be able to gash rope and the interior blue core will keep you up. Seen it happen to a climber. Blue part is harder to cut through. I can't stand the wire core flip line.

Knotahippie · 7th September 2008, 04:08 PM

The core of a kermantle rope is only to keep the rope profile round.

Ive also heard that the core is much weaker than the sheath.

Ekka · 7th September 2008, 04:21 PM

The sheath of kermantle rope (rock climbers rope) is a protective coating to prevent abrasions etc ... the strength is in the core.

Knotahippie · 7th September 2008, 05:37 PM

On arbor ropes too?

Not sure where I heard that now...

Thanks Ekka.

Gunslinger · 7th September 2008, 06:19 PM

According to the rope information in the Wesspur catalog:

Quote:

Kernmantle ropes have a very tightly braided cover and a parallel (not braided) core. In this case only the core is load bearing, while the cover exists only to keep the core fibers bound together and protected from sunlight and abrasion.

treevet · 7th September 2008, 06:30 PM

Quote:

Originally Posted by Knotahippie

On arbor ropes too?

Not sure where I heard that now...

Thanks Ekka.

As for double braid lowering lines and Safety Blue climb, generally the core and the cover share the load.

newguy18 · 7th September 2008, 06:35 PM

Quote:

Originally Posted by Knotahippie

Did it cut thru? I couldn't tell.

How bout' a carbide chain...

yep,cut right through it.

Knotahippie · 7th September 2008, 07:14 PM

Quote:

According to the rope information in the Wesspur catalog:

Quote:

Kernmantle ropes have a very tightly braided cover and a parallel (not braided) core. In this case only the core is load bearing, while the cover exists only to keep the core fibers bound together and protected from sunlight and abrasion.

Cool, I'll have to make a mental note of that, if I can remember where I put my notepad.

TrevMcRev · 8th September 2008, 04:30 AM

Quote:

Originally Posted by treevet

Safety blue braid, my lanyard and climbing line, supposed to be able to gash rope and the interior blue core will keep you up. Seen it happen to a climber. Blue part is harder to cut through. I can't stand the wire core flip line.

What I understand about Safety Blue is that while the inner may be a little harder to cut, the true purpose of it is that it acts as a visual warning indicator that the rope is damaged. Eg on a white or orange Hi-V one the blue will stand out like dogs bits if you put a good nick in it, alerting you to the damage.

I cant remember where i read that, but pretty sure it was off the makers own material.

Beware of a false sense of security there treevet

treevet · 8th September 2008, 06:11 AM

Quote:

Originally Posted by TrevMcRev

What I understand about Safety Blue is that while the inner may be a little harder to cut, the true purpose of it is that it acts as a visual warning indicator that the rope is damaged. Eg on a white or orange Hi-V one the blue will stand out like dogs bits if you put a good nick in it, alerting you to the damage.

I cant remember where i read that, but pretty sure it was off the makers own material.

Beware of a false sense of security there treevet

Been using safety blue since it was invented (before as there was a 3 strand in the beginning). That was the claim back then, prob in late 70's. I never have a false sense of security when it comes to putting a running saw near a line, Trev. I like the way the line works (only the white as the other colors develop burrs I've found) and the dependable history I have with. It is a great downgraded 7k lowering line too.

Knotahippie · 8th September 2008, 04:36 PM

The folks at Sampson wrote me this:

Quote:

The short answer: anytime you have a cover and a core the load is shared.

Long answer: how much of the load is attributied to the cover and how much to the core will depend on a number of factors. These factors will include the material each is made of, the amount of material for each, the amount of twist in each.

There you have it...basicly.

treevet · 8th September 2008, 07:00 PM

Quote:

Originally Posted by treevet

As for double braid lowering lines and Safety Blue climb, generally the core and the cover share the load.

That (above post) is similar to what I got out of the Sherrill Catalogue only more specific. I'd be interested to find out the static strength of the core rope (it is basically a double braid). If rope is 7k (which it approx is) is it 3.5k? Plenty to hold up a fat ass'es falling shock load I bet.

Ekka · 9th September 2008, 12:12 AM

Double braid lowering lines and kermantle rock rope are two different beasts.

Knotahippie · 9th September 2008, 02:19 AM

Right, Thanks Ekka.

7th September 2008, 03:46 PM	#26 (permalink)
JayD Moderator - Sponsor Join Date: Feb 2007 Location: Sydney Posts: 1,166	Re: Flip Lines\| Lanyards\| Wire Core Pole Straps Accidents are just that accidents! There not called purposes However if l could have my choice of what accident l could have lthink l would take a nick to a cable instead of a nick to a rope. l would survive to tell the tale. __________________ Free Tree and Green Industry Link Directory

7th September 2008, 04:08 PM	#28 (permalink)
Knotahippie Mature tree Join Date: Aug 2008 Location: Bay Area Ca. Posts: 322	Re: Flip Lines\| Lanyards\| Wire Core Pole Straps The core of a kermantle rope is only to keep the rope profile round. Ive also heard that the core is much weaker than the sheath.

7th September 2008, 04:21 PM	#29 (permalink)
Ekka Admin - Dip Arb & Hort Join Date: Jan 2007 Location: Brisbane Posts: 7,734	Re: Flip Lines\| Lanyards\| Wire Core Pole Straps The sheath of kermantle rope (rock climbers rope) is a protective coating to prevent abrasions etc ... the strength is in the core. __________________ Arborist Training in Australia\| Your Free Helping Guide Free Tree and Green Industry Link Directory .... Yes, I also SEO (Optimize) and build websites that fly high in Google Qualified Brisbane Tree Lopping \| Stump Grinding and Stump Removal Brisbane Brisbane - Gold Coast Tree Care, Consulting, Developer, Tree and Arborist Reports Forum Sponsors

7th September 2008, 05:37 PM	#30 (permalink)
Knotahippie Mature tree Join Date: Aug 2008 Location: Bay Area Ca. Posts: 322	Re: Flip Lines\| Lanyards\| Wire Core Pole Straps On arbor ropes too? Not sure where I heard that now... Thanks Ekka.

9th September 2008, 12:12 AM	#39 (permalink)
Ekka Admin - Dip Arb & Hort Join Date: Jan 2007 Location: Brisbane Posts: 7,734	Re: Flip Lines\| Lanyards\| Wire Core Pole Straps Double braid lowering lines and kermantle rock rope are two different beasts. __________________ Arborist Training in Australia\| Your Free Helping Guide Free Tree and Green Industry Link Directory .... Yes, I also SEO (Optimize) and build websites that fly high in Google Qualified Brisbane Tree Lopping \| Stump Grinding and Stump Removal Brisbane Brisbane - Gold Coast Tree Care, Consulting, Developer, Tree and Arborist Reports Forum Sponsors

9th September 2008, 02:19 AM	#40 (permalink)
Knotahippie Mature tree Join Date: Aug 2008 Location: Bay Area Ca. Posts: 322	Re: Flip Lines\| Lanyards\| Wire Core Pole Straps Right, Thanks Ekka.