static rope for rappelling and ascending

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static rope for rappelling and ascending

Postby bobby49 » Oct 1, 2018 9:19 pm

We have already weeded out UHMWPE rope. That leaves us with nylon, polyester, and combinations thereof. Let's start with the assumption that all static vertical ropes get the necessary rope pads.

It seems like most vertical cavers try to use 10mm-12mm ropes whenever possible. If the rope has a tough "canyoneering" sheath, then that is a plus. Then on some occasions, a cave trip leader might decide to use a 9mm rope, but hardly anybody moves down very far into what we could call a single rope of a two-rope setup. Who uses 8mm? I'm guessing that nobody uses 8mm or thinner.

One guy said that he used 11mm or 12mm if he didn't have to use a very long length or if he did not have to carry that weight very far. He said that he was inclined to use 8mm-9mm rope when he did have a long carry-in.

As you might tell, I am shopping around for another new rope, probably around 200 feet. I regularly use a 3/8ths inch rope and prior to that was a tough 9mm rope.
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Re: static rope for rappelling and ascending

Postby rodenson » Oct 2, 2018 3:02 am

I know canyoneeringusa offers dependable static ropes.
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Re: static rope for rappelling and ascending

Postby GroundquestMSA » Oct 2, 2018 11:41 pm

11mm is considered standard and PMI Pit rope and its equivalents are the tough as nails products that are most popular. Highline makes an excellent and very cheap 11mm rope. Atwood makes a good cheap polyester 7/16".

I use 8mm often enough simply because I have a length. It is very nice to carry and work with and less nice to climb on. There is more bounce and there are more feeding issues when the rope is slimed. 8mm is harder to find, often more expensive, and less versatile, so I probably won't buy more.
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Re: static rope for rappelling and ascending

Postby trogman » Oct 3, 2018 3:55 pm

I have a friend who says he did Fantastic Pit with either 8 or 9 mm. As long as the rope is hanging free, and not subject to abrasion, it should be plenty strong enough to support the average caver. Not sure if I would use it to climb tandem.
The chief benefit of smaller rope is that it weighs a bit less. That doesn't matter much until you get up to really long lengths.

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Re: static rope for rappelling and ascending

Postby bobby49 » Oct 4, 2018 1:40 am

A fatter rope is likely to last longer in years, if that is a factor.
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Re: static rope for rappelling and ascending

Postby snoboy » Oct 6, 2018 5:01 pm

In my experience, 11 mm is generally too fat to move easily on once you get it dirtyy. This is of course related to the fact that I cave on a stop. 9.5 mm is my happy compromise, although I have done plenty of drops on 8 mm when I ran out of rope, or on expedition. Often related...
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