twin ropes for toprope?

Anthony Milano wrote:to be 1000 pounds on that rope and anchor

Another good one. Glad I put butter on my popcorn.

Anthony Milano wrote:So your saying that if I use one static rope lets say that the forces work out (with the fall/acceleration/etc.) to be 1000 pounds on that rope and anchor... Now if I use twin static ropes the forces would double? )

As I said in the last post are they going to full on double? NO. Are they going to increase? Yes. Sorry I used "double" as a lazy word choice in reply to Ty having already thrown the word out there... For reference in how taking a single strand and using it in twin affects impact forces check out the Beal Joker, one of the few ropes on the market that's had impact testing done in both single vs twin. How much will impact increase in the OP's rope? Nothing short of taking his exact to a drop tower to do the testing will answer that, but there will be an increase in forces during twin use.

Bottom line here, the Op asked about something that "I" feel is a bad idea. I've addresses what I feel to be the bigger issue being rope management. Followed by the lesser issue being possible impact forces should a climber fall with slack in the system. Since he has the rope already it'll be best for him to just keep things simple climbing in single rope mode.

scott cooney wrote: the Beal Joker, one of the few ropes on the market that's had impact testing done in both single vs twin.

And is this the same test?????

Greg D wrote: And is this the same test?????

Is this the same test as what? As in is the UIAA testing the same as what the OP will be doing? God I hope not....

Is the testing the same for twin vs single? Factor 1 dead drops with a 80kg weight? As far as I'm aware it is.

check out the Beal Joker, one of the few ropes on the market that's had impact testing done in both single vs twin.

Really? Only a few tested... Or a few approved?

scott cooney wrote: Is this the same test as what? As in is the UIAA testing the same as what the OP will be doing? God I hope not.... Is the testing the same for twin vs single? Factor 1 dead drops with a 80kg weight? As far as I'm aware it is.

And the survey says... annnn. Wrong again.

Gonna get some more popcorn.

The joker is one of the few that has the testing data out in the open, and yes one of the few approved. How many others have had the testing done? If you have data on other ropes that have been tested both ways and not passed I'd love to see it. Out of curiosity you want to tell me I'm wrong on what the test consists of, please inform my ignorance, it goes a lot further than just telling someone there wrong with out the how so...

scott cooney wrote:The joker is one of the few that has the testing data out in the open, and yes one of the few approved. How many others have had the testing done? If you have data on other ropes that have been tested both ways and not passed I'd love to see it. Out of curiosity you want to tell me I'm wrong on what the test consists of, please inform my ignorance, it goes a lot further than just telling someone there wrong with out the how so...

Why would I provide any info since "experts" like you provide free flowing accurate information so effortlessly. Clearly, you have read something on the internet that qualifies you to respond to the op.

Greg D wrote: Another good one. Glad I put butter on my popcorn.

A climber who weighs 150lbs and falls 10 feet generates roughly 1100lbs of force on the rope (I used 1000lbs). This was overdramatic for a top-rope situation but I figured they could explain how it multiplied the weight without letting math cloud their answers....

Anthony Milano wrote: A climber who weighs 150lbs and falls 10 feet generates roughly 1100lbs of force on the rope (I used 1000lbs). This was overdramatic for a top-rope situation but I figured they could explain how it multiplied the weight without letting math cloud their answers....

What??? Based on what???? Weight and fall length can determine force??? Is that all we need to determine force on the rope? And is force on the rope the same as force on the anchor????

Anthony Milano wrote: A climber who weighs 150lbs and falls 10 feet generates roughly 1100lbs of force on the rope

How did you come up with this????

NO there are other factors that are relevant to. The reason I simplified the numbers was so the poster could explain how the forces double. No the forces different on the anchor and climber... There are tons of variables in the equation...

wallrat.com/PDF_Files/force…

Anthony Milano wrote:NO there are other factors that are relevant to. The reason I simplified the numbers was so the poster could explain how the forces double. No the forces different on the anchor and climber... There are tons of variables in the equation... wallrat.com/PDF_Files/force…

Nice. You have read a few pages on the interweeb. You are expert.

Why do I have to verify my credibility to you? I have been climbing for many years and simply grabbed that one off the internet. I just want to know how it can double the force. Can we allow them to explain it or what?

Anthony Milano wrote:Why do I have to verify my credibility to you?

You already have.

Anthony Milano wrote: I just want to know how it can double the force. Can we allow them to explain it or what?

He can't.

I'm out of popcorn.

Forget the popcorn, I'm gonna grab a beer.

This was fantastic! Popcorn and beer for everyone!

Epic math fail for all involved.