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Falling on a screamer.
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kmc


Apr 27, 2007, 4:02 PM
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Falling on a screamer.
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I fell on my first screamer the other day. I had clipped it to a rusty old pin protecting a crux roof, which probably would have held with just a sling, but I wanted to stay on the safe side. The fall was not very long, so the screamer only opened up a little bit. About 1/4 inch of stiching pulled, and the rest of it is intact (it is a standard screamer, not an ice or zipper screamer). Do you guys think I should continue to use it, or just for fun and to satisfy my curiousity, should I take a big fall in the gym on it?

I know that if it is partially torn, it will slightly reduce the amount of force it will absorb, and it will probably activate at a lower force now. Would that be enough to make you retire it, or still use it on pieces that could probably hold a fall but your just not 100% sure?

Thanks.
~Kevin


greenketch


Apr 27, 2007, 4:16 PM
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Re: [kmc] Falling on a screamer. [In reply to]
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Your fine, However this is the start of a long flame involving physics and other random thoughtsWink Spmetimes I love this board just for the humor.

A screamer is when fully deployed a full strength sling. It will hold you no matter what. Now as to the force. The stitching rips at a set force. This disappates energy that hasbeen accumulated in the fall. The more stitching you have to rip the more dissappation that occurs. It all happens at the same force. Just over more time. So on this screamer it willnothelp as much as a completly intact one. I keep like ones around for those placements that are probably ok but I just feel like helping. Don't use it if you really will need the help of a screamer.

Let the spray BeginTongue


kmc


Apr 27, 2007, 4:31 PM
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Re: [greenketch] Falling on a screamer. [In reply to]
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Thanks for the reply.

I understand the physics behind how a screamer works and how it absorbs force. I just wasnt sure if it would still be able to absorb enough force to make it even worth carrying with me now that it was partially opened.

And yes, I do realize this will probably start a battle. And I know that someone will eventually give the answer, "if you dont trust it, dont use it". Just looking for other opinions, thats all.


caughtinside


Apr 27, 2007, 5:13 PM
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strengthwise, your screamer is still rated to something like 22kn, so it is still safe.

And, as the other poster pointed out, its ability to absorb force is obviously lessened. But it sounds like there is still some gas in the tank?

If it were me, I'd probably retire it, just because. But if you want to keep using it, go ahead, just be concious of it's new limitations. You might want to kind of repack the deployed part and snap a rubber band around it or something to get it back to it's original length? I think a longer screamer, all floppy with blown stiches everywhere, would be kind of annoying on the rack.

And it will probably freak your partners a bit! hahaha


coastal_climber


Apr 27, 2007, 5:26 PM
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Re: [caughtinside] Falling on a screamer. [In reply to]
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It's fine, it hasn't reached the end where the brunt of the weight will be held. They are rated for ripping force and end to end force. It might rip easier, but still hold you once you get to the end.

>Cam


stymingersfink


Apr 27, 2007, 9:19 PM
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Re: [coastal_climber] Falling on a screamer. [In reply to]
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coastal_climber wrote:
It's fine, it hasn't reached the end where the brunt of the weight will be held. They are rated for ripping force and end to end force. It might rip easier, but still hold you once you get to the end.

>Cam

i've heard stories of guys on hard-aid pre-cutting some of the shock-absorbing stitching in order to get them to activate at lower loads. this would probably entail working just one side of the stitching, since if one were to work the stitching out completely across the width of the stitching what would that accomplish?

Probably fine, and if it were mine I would still use it, all things being equal.

I'd bet the sound of the thing ripping gave you a bit of a start though, eh?


kmc


Apr 28, 2007, 12:48 AM
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To be honest with you, I didnt hear a thing. Probably because not much of it actually ripped, and I was cursing and grunting as I was falling. Couldnt hear much of anything over that.


tradmanclimbs


Apr 29, 2007, 10:17 AM
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You may use your screamer for extended periods of time untill you are both satisfyed. failing to satisfy your screamer may result in your screamer finding a new partner and denying you further access to the screamer. Useing propper protection when your screamer deploys is highly recomended. Failing to use proper protection when your screamer deploys may result in dammaged equiptment or the creation of a small smelly annoying little expensive screamer.


rocknice2


Apr 29, 2007, 12:02 PM
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Re: [tradmanclimbs] Falling on a screamer. [In reply to]
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Don't you just hate it when you get your nuts stuck in the crack.


mushroomsamba


May 3, 2007, 6:04 PM
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I fell on one at a rope course where I work. It was scary as hell. I thought my self belay stuff had broken because I fell the extra distance before it finnaly caught me.


lil_monkey


May 4, 2007, 2:55 PM
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Re: [kmc] Falling on a screamer. [In reply to]
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if you don't trust it, don't use it

peace

(This post was edited by lil_monkey on May 4, 2007, 2:56 PM)


cchildre


May 4, 2007, 3:26 PM
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rocknice2 wrote:
Don't you just hate it when you get your nuts stuck in the crack.

So long as I can get a good fist jam in....it is all money...


hiyapokey


May 4, 2007, 5:34 PM
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I'm working on the "weiner jam" for off finger cracks.


catbird_seat


May 4, 2007, 11:13 PM
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Re: [stymingersfink] Falling on a screamer. [In reply to]
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stymingersfink wrote:
i've heard stories of guys on hard-aid pre-cutting some of the shock-absorbing stitching in order to get them to activate at lower loads. this would probably entail working just one side of the stitching, since if one were to work the stitching out completely across the width of the stitching what would that accomplish?
That is why Yates makes the ScreamAid. This sling has a lower activation energy. It also has less ability to absorb energy, but then an aid fall is generally short. They are also lighter than the other Screamers.


stymingersfink


May 6, 2007, 1:11 AM
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catbird_seat wrote:
stymingersfink wrote:
i've heard stories of guys on hard-aid pre-cutting some of the shock-absorbing stitching in order to get them to activate at lower loads. this would probably entail working just one side of the stitching, since if one were to work the stitching out completely across the width of the stitching what would that accomplish?
That is why Yates makes the ScreamAid. This sling has a lower activation energy. It also has less ability to absorb energy,
got 'em, use em, have yet to have one deploy (thank god)
catbird_seat wrote:
...but then an aid fall is generally short.
...but not all of them :) . you should find kate's report on a monster whipper she took last year on Tribal Rite(?) (check articles by Holdplease2, for those who don't know)

one take-aways from that TR of hers: don't girth-hitch wires. EVER! i'm just glad she lived to tell about it.


8flood8


May 6, 2007, 2:20 AM
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Re: [stymingersfink] Falling on a screamer. [In reply to]
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could you please restate your last sentence? i didn't understand what you were saying....


if you don't mind

and how do you mean girth hitching a wire? you mean girth hitching a sling on a wire? or girth hitching a wire on itself?


stymingersfink


May 6, 2007, 2:34 AM
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take-away: lesson to be learned

girth-hitch a wire: girth-hitch a piece of software to a piece of hardware. i don't imagine girth-hitching two stoppers together to be all that dangerous, but software:hardware is a sure point of failure.


8flood8


May 6, 2007, 2:48 AM
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excellent, that all makes sense, thank you!


stymingersfink


May 6, 2007, 3:06 AM
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just keep in mind that girth-hitching generally reduces strength by ~50% (IIRC), so to girth-hitch two wires rated to 10kN would give a resulting strength of ~5kN (again, IIRC).


8flood8


May 6, 2007, 7:10 AM
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hijack -

so does that mean that my metolius pas (which is girth hitched to my harness) is only good for half of the rating?

(not that i'm going to be taking dynamic falls on a piece of static gear...)


shanz


May 6, 2007, 12:50 PM
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tradmanclimbs wrote:
You may use your screamer for extended periods of time untill you are both satisfyed. failing to satisfy your screamer may result in your screamer finding a new partner and denying you further access to the screamer. Useing propper protection when your screamer deploys is highly recomended. Failing to use proper protection when your screamer deploys may result in dammaged equiptment or the creation of a small smelly annoying little expensive screamer.

Hah i was thinking along these lines before i even read to post - if your screamer only partially pops then you havent done your job


napoleon_in_rags


May 10, 2007, 4:21 PM
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Re: [kmc] Falling on a screamer. [In reply to]
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kmc wrote:
I fell on my first screamer the other day. I had clipped it to a rusty old pin protecting a crux roof, which probably would have held with just a sling, but I wanted to stay on the safe side. The fall was not very long, so the screamer only opened up a little bit. About 1/4 inch of stiching pulled, and the rest of it is intact (it is a standard screamer, not an ice or zipper screamer). Do you guys think I should continue to use it, or just for fun and to satisfy my curiousity, should I take a big fall in the gym on it?

I know that if it is partially torn, it will slightly reduce the amount of force it will absorb, and it will probably activate at a lower force now. Would that be enough to make you retire it, or still use it on pieces that could probably hold a fall but your just not 100% sure?

Thanks.
~Kevin

Just get a sewing machine and resew the ripped area. I mean, what does Yates do that is so special?

-Pete


greenketch


May 10, 2007, 6:03 PM
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napoleon_in_rags wrote:
Just get a sewing machine and resew the ripped area. I mean, what does Yates do that is so special?

-Pete

I would sincerly hope this is a troll. Unless you have some background to calculate stitching type and thread. Then the quantity of same to achieve the desired rupture force. I would not go there. The difference between a Bomber quickdraw and a screamer is only the type of stitching. Blush


healyje


May 15, 2007, 5:41 AM
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catbird_seat wrote:
stymingersfink wrote:
i've heard stories of guys on hard-aid pre-cutting some of the shock-absorbing stitching in order to get them to activate at lower loads. this would probably entail working just one side of the stitching, since if one were to work the stitching out completely across the width of the stitching what would that accomplish?
That is why Yates makes the ScreamAid. This sling has a lower activation energy. It also has less ability to absorb energy, but then an aid fall is generally short. They are also lighter than the other Screamers.

I've been pre-slicing since 'Air Voyager' days - but all my applications have been for free climbing, not aid. And I have pre-sliced ScreamAids as well; their loading curve is still just too steep for some applications I use them for, like smaller Crack N'Ups and nests of RP's that need to equalize properly before loading, or slotted hooks. Sometimes I want loading to start at < 10 pounds and ramp up in a relatively flat, curve. The cuts I use can be visualized as a very steep angle across the screamer, but is more digital in terms of how far each seam is cut.


flamer


May 15, 2007, 11:30 PM
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8flood8 wrote:
metolius pas

Do yourself a favor, use a nylon daisy instead.

josh


8flood8


May 16, 2007, 3:29 PM
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flamer wrote:
8flood8 wrote:
metolius pas

Do yourself a favor, use a nylon daisy instead.

josh

Can you give a little more explanation? Daisy chains are for aid climbing. The small pockets are only rated to 3kn. Each of the loops in a pas is fully rated. People can clip into you if there is no more room on the bolt. I see no advantage of the daisy over the pas, for the purposes in which i use it. (cleaning anchors and multipitch climbing)


flamer


May 16, 2007, 3:58 PM
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I certainly can....PM coming.

josh


tigerlilly


May 17, 2007, 7:51 PM
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I would also be interested in the explanation of why a daisy chain is preferable to a Metolius PAS as a personal anchor. Lots of climbers I know use the PAS, self included.

Kathy


mojomonkey


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tigerlilly wrote:
I would also be interested in the explanation of why a daisy chain is preferable to a Metolius PAS as a personal anchor. Lots of climbers I know use the PAS, self included.

Kathy

Any reason for the PM versus posting it here? I don't use either but would like to hear this if I ever get around to considering either...


flamer


May 17, 2007, 9:28 PM
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mojomonkey wrote:
Any reason for the PM versus posting it here?

To many arm chair mountaineers/techy no it alls around here...and I don't feel like playing games.

Here is all I'm going to tell you. Those pas device's aren't as "strong" as you think. IF you are going to use any kind of "tether" the safest thing to use is a NYLON (NOT SPECTRA) daisy chain or something similiar.
Just remember, always tie in with the rope.

josh


majid_sabet


May 17, 2007, 9:47 PM
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reno


May 17, 2007, 10:01 PM
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majid_sabet wrote:
I have some recent images of how screamers and daisy survived the fall test, I mean load decked but daisies were still hanging out there . Do you guys want to see them ?

Have a guy with current CPR and an AED ready to assist you in event of a heart attack .

I have some images where a climber was wearing a helmet and fell and died. Do you want to see them?

Have a guy with current CPR.... whatever.


majid_sabet


May 18, 2007, 5:23 AM
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(This post was edited by majid_sabet on May 18, 2007, 6:55 PM)


curt


May 18, 2007, 5:55 AM
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kmc wrote:
Thanks for the reply.

I understand the physics behind how a screamer works and how it absorbs force...

Actually, you obviously don't--since Screamers do not absorb force. Screamers limit force by absorbing energy.

Curt


abock33


May 18, 2007, 7:28 AM
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IMO I'd clip it to a keychain biner and take a whipper off it. Obviously I'd make sure to back up the blot under it.

Of course this is only what I would do with it. You can do with it as you please.

just my opinion!Wink


basilisk


May 21, 2007, 3:52 AM
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flamer wrote:
mojomonkey wrote:
Any reason for the PM versus posting it here?

To many arm chair mountaineers/techy no it alls around here...and I don't feel like playing games.

Here is all I'm going to tell you. Those pas device's aren't as "strong" as you think. IF you are going to use any kind of "tether" the safest thing to use is a NYLON (NOT SPECTRA) daisy chain or something similiar.
Just remember, always tie in with the rope.

josh

i'm getting extremely tired of you hinting at things but never backing them up. if you know something we don't just spit it out. do us all a service, eh? if anything YOU are the armchair techie. every post you make talks about how some piece of gear is suspect but you never elaborate on it.
if you don't want to argue about it, you don't have to revisit the topic after your initial post. but quit being such a whiner about people potentially criticizing you

honestly, i personally have never held a desire for the killfile feature, but you're certainly making me wonder if it would be worthwhile so i could ignore your bullshit.


flamer


May 23, 2007, 5:46 PM
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basilisk wrote:
flamer wrote:
mojomonkey wrote:
Any reason for the PM versus posting it here?

To many arm chair mountaineers/techy no it alls around here...and I don't feel like playing games.

Here is all I'm going to tell you. Those pas device's aren't as "strong" as you think. IF you are going to use any kind of "tether" the safest thing to use is a NYLON (NOT SPECTRA) daisy chain or something similiar.
Just remember, always tie in with the rope.

josh

i'm getting extremely tired of you hinting at things but never backing them up. if you know something we don't just spit it out. do us all a service, eh? if anything YOU are the armchair techie. every post you make talks about how some piece of gear is suspect but you never elaborate on it.
if you don't want to argue about it, you don't have to revisit the topic after your initial post. but quit being such a whiner about people potentially criticizing you

honestly, i personally have never held a desire for the killfile feature, but you're certainly making me wonder if it would be worthwhile so i could ignore your bullshit.

You are a classic example of the reason so many good climbers don't even look at this site anymore. Let alone post worthwhile info. Thanks for being the problem.

You can suck my nuts.

josh


jsh


May 23, 2007, 11:00 PM
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<<<elbows basilisk out of the way>>>

Sly


healyje


May 24, 2007, 5:45 AM
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Josh, not sure where you're getting the info on the PAS ratings. I know for a fact Metolius tests them pretty rigorously. I just had my several year old PAS tested along with a third year's batch of Mammut Dyneema slings I've had tested. They test out solid, what specifically is the problem or issue with them?


basilisk


May 26, 2007, 1:53 AM
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flamer wrote:
You are a classic example of the reason so many good climbers don't even look at this site anymore. Let alone post worthwhile info. Thanks for being the problem.

You can suck my nuts.

josh

this is my point. you are failing to post worthwhile info. you're ragging on companies and gear without saying why. in addition you just flamed me because i asked you for a simple explanation. sounds like YOU are the problem to me.

go whine about BDs cams some more. see what other crap you can come up with.


flamer


May 26, 2007, 2:08 AM
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basilisk wrote:
in addition you just flamed me because i asked you for a simple explanation.

go whine about BDs cams some more. see what other crap you can come up with.

LoL...simple explanation? You are more stupid than you sound!
You got flamed..because you flamed. Idiot.

If you'd like to see someone asking for a simple explanation than maybe you should look at healyje's post above. He got an answer from me via PM. That PM also explained why I wasn't posting what I know here in a public forum.

I've never whined, complained, or talked trash about BD CAMS specifically. I have said BD is not the upstanding company that so many people think they are...but never anything about their cams. I, in fact use them in the larger sizes.

...but you probably won't see this response because you killfiled me right? WAIT!! How did you see my last response? Are you full of empty promise's?

josh


basilisk


May 26, 2007, 2:21 AM
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we don't have killfile....

if we did, i wouldn't be yapping at you in the first place. i covered that in the original post.

you still haven't explained yourself; or even explained why you refuse you explain yourself. (armchair techies doesn't quite cut it)

regardless, i'm thinking i should ignore the possibility that you might have something worthwhile to say. every time i ask you just get more stubborn about not saying a word.


apologies for dragging this thread so far off topic


flamer


May 26, 2007, 2:33 AM
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basilisk wrote:

you still haven't explained yourself

(armchair techies doesn't quite cut it)

regardless, i'm thinking i should ignore the possibility that you might have something worthwhile to say.

Nor do I have to! ...or will I because a punter like you thinks he deserves something and is a jerk about it.

Arm chair techie's does cover it(it not the only reason)...present company included!

Please ignore everything I have to say...you already know everything anyway!

josh


(This post was edited by flamer on May 26, 2007, 2:36 AM)


basilisk


May 26, 2007, 3:39 AM
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oh flamer, you so crazy.


carabiner96


May 26, 2007, 3:42 AM
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flamer wrote:
basilisk wrote:

you still haven't explained yourself

(armchair techies doesn't quite cut it)

regardless, i'm thinking i should ignore the possibility that you might have something worthwhile to say.

Nor do I have to! ...or will I because a punter like you thinks he deserves something and is a jerk about it.

Arm chair techie's does cover it(it not the only reason)...present company included!

Please ignore everything I have to say...you already know everything anyway!

josh

Well, I happen to know basilisk, and he is no arm chair techie. Knowing him has nothing to do with how useless your posts are, flamer, and a waste of brain cells to read them.

Back that junk up, or else your contributions to threads are as useless as completely wrong and misguided answers.


flamer


May 26, 2007, 2:01 PM
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Awwwww.....2 little pansy's from Vermont with each others backs!!

I'll bet you guys got to do a whole bunch of snow slogs this winter huh? Probably Have "epics" all the time just so you can "cuddle" to keep warm.

Classic RC.noob idiots. No wonder every leaves this site!

josh


flamer


May 26, 2007, 2:04 PM
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carabiner96 wrote:
Back that junk up, or else your contributions to threads are as useless as completely wrong and misguided answers.


Had to quote it....it's maybe the funniest, threat? or statement? or what the hell are you saying?

You back up that you're an idiot or, um, you're an idiot?

josh


carabiner96


May 26, 2007, 3:05 PM
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flamer wrote:
Awwwww.....2 little pansy's from Vermont with each others backs!!

I'll bet you guys got to do a whole bunch of snow slogs this winter huh? Probably Have "epics" all the time just so you can "cuddle" to keep warm.

Classic RC.noob idiots. No wonder every leaves this site!

josh


Basilisk? He's a stud...I'd cuddle with him any day.


reno


May 26, 2007, 3:09 PM
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OK, people. Ease up a bit, eh?


basilisk


May 28, 2007, 11:06 PM
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flamer wrote:
I'll bet you guys got to do a whole bunch of snow slogs this winter huh? Probably Have "epics" all the time just so you can "cuddle" to keep warm.

i changed my mind. i like you. you can join our cuddlefest, but only if i get to give you a noogieBlush


carabiner96


May 28, 2007, 11:37 PM
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basilisk wrote:
flamer wrote:
I'll bet you guys got to do a whole bunch of snow slogs this winter huh? Probably Have "epics" all the time just so you can "cuddle" to keep warm.

i changed my mind. i like you. you can join our cuddlefest, but only if i get to give you a noogieBlush

YAY! A threesome!!!


flamer


May 28, 2007, 11:39 PM
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carabiner96 wrote:
basilisk wrote:
flamer wrote:
I'll bet you guys got to do a whole bunch of snow slogs this winter huh? Probably Have "epics" all the time just so you can "cuddle" to keep warm.

i changed my mind. i like you. you can join our cuddlefest, but only if i get to give you a noogieBlush

Ok, but I call the middle! You sexy bastards!

josh

YAY! A threesome!!!


healyje


May 30, 2007, 12:51 AM
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tigerlilly wrote:
I would also be interested in the explanation of why a daisy chain is preferable to a Metolius PAS as a personal anchor. Lots of climbers I know use the PAS, self included.

Kathy

Josh (Flamer) was obliquely relaying that a reputable source he knows did some destructive drop testing on a bunch of things including daisies and the Metolius PAS. As a result of these tests he is advising folks to use regular nylon daisies instead of the PAS.

Josh, the problem with these tests isn't the results, but to some extent with both the tests and the interpretation of the what the results mean.

First, and as you note, taking a dynamic fall on either a daisy or a PAS is a misuse of either - neither were ever designed to hold falls. As to your statement that people do sometimes make that mistake - true enough, it does sometimes happen - but, significant daisy falls (from above the point of attachement) basically only ever happens when aiding, and again, improperly. Daisies are designed for aid; the PAS was never designed for nor recommended for use as a 'daisy' when aiding.

Second, daisy chain pockets can and do blow around 300lbs and, in a bad fall you will ultimately either blow out a chain pocket or come to the end of the daisy - either way you will hopefully be brought (broke) up short by the end loops. A PAS loop is made up of the same sling material and manner as a 22kn sling is, but due to the webbing on webbing connections inherent in the design they will fail somewhere around 18kn. A daisy tested just with endloops will likely test out a bit above that. The point, however, is that your body wouldn't survive either intact - you'd be busted up in a grand way regardless way before either of those loads.

Third, the P.A.S. stands for 'Personal Anchor System' - not as a daisy. If you arrive at a belay and clip a solid anchor with a PAS and then fell off the stance to the end of the PAS you can still hurt yourself badly depending on how much PAS is out - but the odds of a slip from a belay on to the anchor via a PAS generating anywhere near the types of forces/loads I've just mentioned above are infintessimal to none.

So in general, "misuse" is the operative word here for any failure of a daisy or a PAS and in this whole discussion. The difference is you possibly could, by a fluke or miscue, fall on a daisy from above the attachment point while aiding - that should never happen with a PAS. Used as intended, as a Personal Anchor System and where you are never above your anchor, you are not going to generate forces that would break one. Josh, the results you have implied are correct, your takeaway message is not, however. It's apples and oranges to an extent and the comparison of the failures is only valid for misuses of either, and an extreme misuse in the case of the PAS. As a daisy the PAS is an serious error in judgment; as an anchoring system the PAS is superior in everyway to a daisy.


carabiner96


May 30, 2007, 12:56 AM
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healyje wrote:
tigerlilly wrote:
I would also be interested in the explanation of why a daisy chain is preferable to a Metolius PAS as a personal anchor. Lots of climbers I know use the PAS, self included.

Kathy

Josh (Flamer) was obliquely relaying that a reputable source he knows did some destructive drop testing on a bunch of things including daisies and the Metolius PAS. As a result of these tests he is advising folks to use regular nylon daisies instead of the PAS.

Josh, the problem with these tests isn't the results, but to some extent with both the tests and the interpretation of the what the results mean.

First, and as you note, taking a dynamic fall on either a daisy or a PAS is a misuse of either - neither were ever designed to hold falls. As to your statement that people do sometimes make that mistake - true enough, it does sometimes happen - but, significant daisy falls (from above the point of attachement) basically only ever happens when aiding, and again, improperly. Daisies are designed for aid; the PAS was never designed for nor recommended for use as a 'daisy' when aiding.

Second, daisy chain pockets can and do blow around 300lbs and, in a bad fall you will ultimately either blow out a chain pocket or come to the end of the daisy - either way you will hopefully be brought (broke) up short by the end loops. A PAS loop is made up of the same sling material and manner as a 22kn sling is, but due to the webbing on webbing connections inherent in the design they will fail somewhere around 18kn. A daisy tested just with endloops will likely test out a bit above that. The point, however, is that your body wouldn't survive either intact - you'd be busted up in a grand way regardless way before either of those loads.

Third, the P.A.S. stands for 'Personal Anchor System' - not as a daisy. If you arrive at a belay and clip a solid anchor with a PAS and then fell off the stance to the end of the PAS you can still hurt yourself badly depending on how much PAS is out - but the odds of a slip from a belay on to the anchor via a PAS generating anywhere near the types of forces/loads I've just mentioned above are infintessimal to none.

So in general, "misuse" is the operative word here for any failure of a daisy or a PAS and in this whole discussion. The difference is you possibly could, by a fluke or miscue, fall on a daisy from above the attachment point while aiding - that should never happen with a PAS. Used as intended, as a Personal Anchor System and where you are never above your anchor, you are not going to generate forces that would break one. Josh, the results you have implied are correct, your takeaway message is not, however. It's apples and oranges to an extent and the comparison of the failures is only valid for misuses of either, and an extreme misuse in the case of the PAS. As a daisy the PAS is an serious error in judgment; as an anchoring system the PAS is superior in everyway to a daisy.

That is an excellent, textbook and helpful response. Thank you.


basilisk


May 30, 2007, 3:26 AM
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agreed! thanks!


knieveltech


May 30, 2007, 3:30 AM
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tradmanclimbs wrote:
You may use your screamer for extended periods of time untill you are both satisfyed. failing to satisfy your screamer may result in your screamer finding a new partner and denying you further access to the screamer. Useing propper protection when your screamer deploys is highly recomended. Failing to use proper protection when your screamer deploys may result in dammaged equiptment or the creation of a small smelly annoying little expensive screamer.

Haha classic


flamer


May 31, 2007, 2:01 AM
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Healy,

Not only did you not get it. I assumed that you understood the reason I PM'd you was for the info to remain private. I do not appreciate your post,it is out of line and disrespectful.

I'm very glad I did not share all of the info with you and find it funny that you call these test's...oblique and destructive...both in what i interpret as an attempt to write them off. You do not even know what EXACTLY was done in the test's, thus your interpretations are useless.

Yes neither should be shock loaded as I noted, TO YOU, however situations regularly occur,in all types off climbing that could result in a force big enough for the PAS to fail, which is what was discovered in the drop tests. Yes the loops on a daisy can blow out. However there will not be catastrophic failure. Which is possible with the PAS.

The problem with the PAS is it's use of spectre. If they used Nylon it would be a superior device. Although the friction added in nylon to nylon contact would need to be studied.
You missed and left out some of the points.

If you wanted to discuss this you should have PMed me back directly. I'm sure you took the time to look up the "reputable source", in an effort to discredit what I told you. But they exsist and did the test's I said. So that didn't work.

josh


healyje


May 31, 2007, 4:13 AM
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flamer wrote:
Healy, Not only did you not get it. I assumed that you understood the reason I PM'd you was for the info to remain private. I do not appreciate your post,it is out of line and disrespectful.

Josh, if you didn't want to discuss the issue you shouldn't have interjected it into a completely different topic. And, let's be clear, neither you nor anyone else should be slamming a product without citing any of the information whatsoever. No matter how you slice it, that's oblique, unsubstantiated innuendo - and I'm not the only one calling you on it here. And there is no problem discussing such issues openly, just as I have with the Mammut 8mm Slings testing I've had done.

flamer wrote:
I'm very glad I did not share all of the info with you and find it funny that you call these test's...oblique and destructive...both in what i interpret as an attempt to write them off. You do not even know what EXACTLY was done in the test's, thus your interpretations are useless.

Again, you shared enough to understand exactly what went on. When you state that a PAS was tested to failure, that is the very definition is 'destructive testing' as opposed to 'non-destructive testing' - it's a technical term for the type of testing done - not my opinion of them. Your claim, and not the testing, is what was 'oblique' (def: Indirect or evasive) and you alone are responsible for that. Again, don't publicly slam a product without backing it up. As for my interpretations, they are spot on - all I needed to know is they tested to failure.

flamer wrote:
Yes neither should be shock loaded as I noted, TO YOU, however situations regularly occur,in all types off climbing that could result in a force big enough for the PAS to fail, which is what was discovered in the drop tests. Yes the loops on a daisy can blow out. However there will not be catastrophic failure. Which is possible with the PAS.

No, situations do not regularly occur which could result in a force big enough for the PAS to fail in all types of climbing. Outside of using a daisy or a PAS improperly when aiding, such situations essentially never occur. I also checked with Metolius as well - there has never been a PAS failure of any kind. A 'catastrophic failure' is not possible with the PAS unless misused in the extreme and your body would be a wreck at far lesser forces.

If you or your source, which I did not name or even characterize, have evidence to the contrary then you or they should by all means trot it out - Metolius would love to see it - they are all about facts and have no problem with someone putting their products to the test so long as it is valid, relevant testing.

flamer wrote:
The problem with the PAS is it's use of spectre. If they used Nylon it would be a superior device. Although the friction added in nylon to nylon contact would need to be studied. You missed and left out some of the points.

Quite the contrary, it would not be a superior device. To make such a device hold a standard 22kn or more I'm guessing it would be bulky and no one would use it. Again, the PAS already breaks at strengths far greater the human body was ever designed to handle. It is more than fine as an anchoring device.

flamer wrote:
If you wanted to discuss this you should have PMed me back directly. I'm sure you took the time to look up the "reputable source", in an effort to discredit what I told you. But they exsist and did the test's I said. So that didn't work.

Josh, I'm a PAS user myself and the reason folks gave you a rasher of shit over this is you slammed a product obliquely with the innuendo of failure without providing substantiation of any kind. Again, I have every faith the folks you said did the testing are entirely legitimate and the test results they reported were accurate. The point of debate isn't how reputable they are, or the accuracy of their testing, it's the applicability and relevance of that testing to climbing and the legitimate use of a PAS that is in dispute. I have no interest in discrediting you, them, or any of those facts. I'm simply telling you either your or their interpretation of what those results mean to a climber using either a daisy or a PAS is a mischaracterization of the facts involved.

I'm sorry, but you've conducted this conversation badly relative to both interjecting it into an unrelated thread when it deserved a thread of its own; by not stating facts clearly; and by not substantiating any of what you did say. My interpretation is correct given the facts you pm'd me. As I said, I would very much encourage you or your friends to both post up the specifics of the testing methodology, the actual results, and their technical interpretation of those results as well as contact Metolius with the same.

What on earth is the point of all the secrecy? No one here needs it, Metolius certainly doesn't require it, and no one will think the less of you or your source. Like I said, I've had similar independent testing done on my own Mammut 8mm slings for the past two years and both published it and shared the results with Mammut. Exactly what is the problem with a clear and open discussion of this issue?


(This post was edited by healyje on May 31, 2007, 7:15 AM)


musicman1586


May 31, 2007, 4:53 AM
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One of the best posts I've read in a while.

Josh, you are the reason why I don't get involved in conversations on here as often as I would like to these days, it is people like you who make it useless to try and talk on these forums. Your a bag of hot air, you have nothing worthwhile to say, and I do hope that a moderator bans you quite soon so we can get rid of your useless banter, you provide nothing to topics, and in truth you have detracted from this one by making it come to a screeching halt because you felt the need to argue instead of just back yourself up with the information that you have. Please, take you and your rubbish to some other website and stop polluting this one.


healyje


May 31, 2007, 5:04 AM
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I don't know, that's a little harsh. I know for a fact Josh does have some good things to contribute and has, this one is just not one of his best efforts and he's gotten a bit surely once people called him on it.


flamer


May 31, 2007, 1:05 PM
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Healy,

Although i do have some respect for you and some of your post's I disagree with you on this completely.
I'm very diappointed in your posting information I gave you in private.

Musicman,
If all it takes to keep your idiot mouth shut, is for me to say something. Than I'll be responding to everything you say.


josh


Valarc


May 31, 2007, 1:53 PM
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healyje wrote:
Quite the contrary, it would not be a superior device. To make such a device hold a standard 22kn or more I'm guessing it would be bulky and no one would use it.

Sterling makes a nylon version of the PAS, which was just pointed out to me in another thread a few days ago. It's called the "chain reactor" and is virtually impossible to actually find anyone selling the thing. I emailed sterling to ask if they knew of a dealer who sells them, but haven't gotten a response yet. I also can't find much information about this device online at all - there is very little in the way of testing, strength, etc. All Sterling says AFAIK is that it held 3 falls, which I'm guessing is the same as the number of falls rating on a rope.

http://www.sterlingrope.com/...roducts3.asp?pmid=14


Now whether it's a superior device or not is up in the air, but at least one company thought it was worth making.


basilisk


May 31, 2007, 4:39 PM
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i'm not too interested in being involved in this anymore, but there's two things i wanted to point out:
1) the PAS isn't exclusively spectra, the black and red fibers are nylon. besides, the Metolius website says they're made out of their proprietary Power Webbing. i'll be honest, i don't know what that is, but it isn't necessarily spectra
2) testing has shown that spectra is significantly weakened over time. after it's held a couple falls it's pretty much equal to nylon on every aspect


flamer


May 31, 2007, 5:01 PM
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basilisk wrote:
2) testing has shown that spectra is significantly weakened over time. after it's held a couple falls it's pretty much equal to nylon on every aspect

Except that it NEVER has any dynamic qualities. Which is why spectra(or it's many knock off's) is not a good material for anytype of "tether".

josh


Valarc


May 31, 2007, 5:14 PM
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First, I'd love to see a link to testing that shows that spectra is "equal to nylon on every aspect" after it's held a few falls.

The elasticity of nylon is far better than spectra, and I don't see "weakening" fibers as somehow magically increasing their elasticity. Every thing I've read supports what is shown in John Long's latest edition of 'Climbing Anchors' - high tech fibers, while attaining a great strength to weight ratio, invariably fare worse than plain old nylon during dynamic loading, due to their low melting points and lack of elasticity.

I've seen plenty of comparisons where, on the first drop, spectra broke and nylon held - how exactly is the spectra gonna be "pretty much equal to nylon" when it's snapped in half?

As far as relating directly to the PAS/Chain Reactor debate - as I said, there's not much out there on the web about the CR because it's a fairly new product, but here's one link from a canyoneering forum

http://www.alpinets.com/...a9ae799f9c1d29d0b534

Here, the claim is that the CR held on three factor 2 falls, and the PAS failed on the first one. Considering all the testing I've seen that shows similar results when comparing nylon and spectra, I have little reason to question these results.


Valarc


May 31, 2007, 5:16 PM
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By the way, while I seem to at least marginally be agreeing with Flamer's argument here, I agree with many of the rest of you that he's an utter douchebag for making all kinds of claims about testing and then refusing to provide any details.


basilisk


May 31, 2007, 5:27 PM
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Re: [flamer] Falling on a screamer. [In reply to]
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flamer wrote:
basilisk wrote:
2) testing has shown that spectra is significantly weakened over time. after it's held a couple falls it's pretty much equal to nylon on every aspect

Except that it NEVER has any dynamic qualities. Which is why spectra(or it's many knock off's) is not a good material for anytype of "tether".

josh

and thus my point, that ultimately you're relying more on the nylon than you are the spectra (if it even IS spectra).
and as healyj has pointed out, it's fine for use as a tether, because you aren't falling on it.


healyje


May 31, 2007, 6:00 PM
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That's right, the whole discussion is about "what if I grossly misused this product?" The first result of that misuse would be busting your body up quite badly because we aren't talking about force on the anchor - we're talking about force applied directly to your body. Don't kid yourself - the Sterling device will rip you up just as badly as the PAS - the nylon over that distance isn't going to mitigate the damage to you. Again, you NEVER wan't to fall on either of these devices or a daisy - ever. Slipping off your belay stance onto a PAS is never going to break it. If this non-issue is a concern to you - by all means get the Sterling Product instead.


flamer


May 31, 2007, 8:09 PM
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healyje wrote:
That's right, the whole discussion is about "what if I grossly misused this product?"

I'm curious, healy, have you ever taken a daisy fall?

I have. twice. Hurt like hell. But I was actually not harmed. I didn't break the nylon daisy I was using.

People "grossly misuse" climbing products all the time. Ever hear of someone soloing on a Grigri? IS it rated for that?

When was the last time you did some devious descent? Rappel's from trees or slung blocks way out on the edge...did you clip your "tether" to the sling's before stepping out to thread the rope? What if you slipped?

But that never happens right? No one would ever do anything like that! And slip!! I've got to be kidding!

Keep your head in the dirt and soon your body will join it.

josh


majid_sabet


May 31, 2007, 8:15 PM
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flamer wrote:
healyje wrote:
That's right, the whole discussion is about "what if I grossly misused this product?"

I'm curious, healy, have you ever taken a daisy fall?

I have. twice. Hurt like hell. But I was actually not harmed. I didn't break the nylon daisy I was using.

People "grossly misuse" climbing products all the time. Ever hear of someone soloing on a Grigri? IS it rated for that?

When was the last time you did some devious descent? Rappel's from trees or slung blocks way out on the edge...did you clip your "tether" to the sling's before stepping out to thread the rope? What if you slipped?

But that never happens right? No one would ever do anything like that! And slip!! I've got to be kidding!

Keep your head in the dirt and soon your body will join it.

josh

Flamer
Have you seen my photos of broken daisy ?
http://www.rockclimbing.com/..._reply;so=ASC;mh=25;


(This post was edited by majid_sabet on May 31, 2007, 8:18 PM)


healyje


May 31, 2007, 8:29 PM
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flamer wrote:
I'm curious, healy, have you ever taken a daisy fall? I have. twice. Hurt like hell. But I was actually not harmed. I didn't break the nylon daisy I was using.

No, I haven't and don't plan on taking one. That you didn't break the nylon daisy means nothing. As the pictures posted upthread amply display, nylon daisies do break and quite often in daisy falls.

flamer wrote:
People "grossly misuse" climbing products all the time. Ever hear of someone soloing on a Grigri? IS it rated for that?

People do sometimes "grossly misuse" climbing products and quite often pay a high price for doing so. Products are not designed for such misuse. As for roped soloing, an easy 50% of the last thirty years of my climbing has been roped soloing, much of it in the last decade on a grigri. Nothing about that application of a grigri is a "gross misuse" of the product - it may not be a designed use, or a rated use, but it in no way constitutes "gross misuse".

flamer wrote:
When was the last time you did some devious descent? Rappel's from trees or slung blocks way out on the edge...did you clip your "tether" to the sling's before stepping out to thread the rope? What if you slipped?

Josh, I've been climbing for 33 years and long before any of this fancy gear was ever available. I was climbing on goldline waist wraps in JC Penny workboots - we had no cams and no locking biners. I've seen every kind of funky gear ever made and seen almost all of it misused at one time or another. But in the context of this discussion of the PAS the only way you'd have even a remote chance of breaking one is if you fell on its full length from above an anchor - slipping off your stance is not going to break one. And again, any force that would break one would likely damage you so bad you'd wish you were dead.

In reply to:
Keep your head in the dirt and soon your body will join it.

Thirty-three years later I'm still putting up reasonably hard groundup, onsight, trad FA's and have never been seriously hurt. If you're still around and climbing in another decade or so we can have that particular discussion again because I know I'll still be climbing then.


flamer


Jun 1, 2007, 4:53 AM
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Majid,

I see several pic's of Daisy's using spectre that have completely failed and 1 pic of a nylon daisy that has pockets blown but did not completely fail. Oh! And 1 pic of an ADC breaking at the cam buckle.
Am I missing something?


josh


healyje


Jun 1, 2007, 5:40 AM
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Neither will a PAS when used for anchoring - and none ever have.


flamer


Jun 1, 2007, 9:14 PM
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healyje wrote:
flamer wrote:
flamer wrote:
When was the last time you did some devious descent? Rappel's from trees or slung blocks way out on the edge...did you clip your "tether" to the sling's before stepping out to thread the rope? What if you slipped?

Josh, I've been climbing for 33 years and long before any of this fancy gear was ever available. I was climbing on goldline waist wraps in JC Penny workboots - we had no cams and no locking biners. I've seen every kind of funky gear ever made and seen almost all of it misused at one time or another. But in the context of this discussion of the PAS the only way you'd have even a remote chance of breaking one is if you fell on its full length from above an anchor - slipping off your stance is not going to break one. And again, any force that would break one would likely damage you so bad you'd wish you were dead.

Answer the question.

Sure seems like a classic example of a situation where shock loading a "tether" of any kind could be a problem. It's also an example of a situation that happens ALL THE TIME.

josh


healyje


Jun 1, 2007, 10:51 PM
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flamer wrote:
[Answer the question.

I did. The only way you are going to load a PAS with anywhere near the forces you're suggesting might break one is if you were to drop the entire length of the PAS from directly above the anchor. Slipping from the anchor or below or beside isn't going to do it even remotely. You also have to take into account the difference between a static load like a concrete block and the more dynamic load of a soft human body in a harness - one dissapates a certain amount of the force and the other doesn't.

Look, there is no problem of any kind with you or your friends posting their data and conclusions here and sending them to Metolius for them to respond directly to this issue if you really want to pursue this issue. It would be far more productive than you and I bantering about.


flamer


Jun 3, 2007, 10:53 PM
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healyje wrote:

You answered "around" it. But whatever, you are right this is getting us no where.

Maybe you should look here.....

http://www.rockclimbing.com/cgi-bin/forum/gforum.cgi?post=1607567;page=unread#unread

Specifically the 3rd post down.

...nobody does that though!

josh


Partner rgold


Jun 4, 2007, 3:22 AM
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I don't have any idea what "private" information Josh may be referring to, but there is some public information about tethers on canyoneering.net. The following post

http://www.canyoneering.net/forums/showthread.php?t=700

summarizes the results of some tests.

----------Begin Post----------

I recently attended the International Technical Rescue Symposium in Fort Collins Colorado. ITRS is a yearly event where rescue professionals from around the world meet to exchange ideas on advances in rescue equipment and techniques. There was an interesting paper presented this year that directly pertains to this thread.

Research was done by Mike Gibbs of Rigging for Rescue in Ouray Colorado on the results of shock loading daisy chains and other commonly used positioning lanyards. In addition to being the owner of one of the premier rescue training organizations in the country (R4R), Mike is an active climbing guide as well as a member of the Ouray Mountain Rescue team. Mike performed dynamic testing on daisy chains as well as a number of positioning lanyards commonly used in climbing and rope rescue. The results of this testing were informative, to say the least. After reading this post, many of you may want to reconsider your choice in positioning lanyards.

Mike designed a drop test representative of what could take place in the field that would provide some indications as to the capabilities and/or limitations of positioning lanyards. A common example in canyoneering would be slipping from a stance when starting a rappel with the anchor at your feet resulting in dynamically loading your safety lanyard. The purpose was to examine the magnitude of peak forces as well as the integrity of the connections on certain commercially and user-created lanyards in a dynamic event. The drops were conducted with 80 kg and 100 kg mass simulating the weight of a climber or climber with a heavy pack and fall factors from 0.5 – 2.0. The surprise was how easily daisy chains and some other lanyards resulted in catastrophic failure on relatively short drops.

Test results were sobering at best. Particularly considering how many canyoneers still insist on using the daisy chain (almost 30% of poll responders) as their primary positioning lanyard. Daisy chains failed in short falls (FF 0.5-1.0) and slings made of Spectra/Dyneema webbing exhibited alarmingly high impact forces (>12kN) and catastrophic failure at surprisingly low fall factors. In canyoneering this could easily happen at any rap anchor below chest level. One slip and bang, you’ve dynamically loaded the anchor.

Nylon slings (not nylon daisy chains) and the Purcell Prusik came out on top as a result of their shock absorbing abilities. Typically, nylon slings held falls with reasonable impact forces (<10kN). The Purcell Prusik did best holding up to factor 2 falls with impact forces of less than 12kN. (FYI acceptable impact forces: CE 6kN, CSA/OSHA 8kN and UIAA 12kN).

I would urge all of you using daisy chains as your primary positioning safety lanyard to stop immediately! And those of you using Spectra/Dyneema slings for this purpose do the same. I would recommend you switch to something like the Petzl Spelegyca, Imlay Clipster, Purcell Prusik or nylon accessory cord or tape sling that has at least some dynamic shock absorbing ability.

Charly

----------End Post----------

Unfortunately, the author uses the words "failure" and "catastrophic failure" in a way that makes one wonder whether there is an important distinction being made, and the piece is lacking in the kind of precise details that would help climbers make a sensible decision.

There has been some discussion about whether climbers can ever get into significant fall-factor situations while using tethers. Personally, I have found myself in two such situations.

1. In a few instances, I've found rap anchors placed in a position that has forced me to clip the anchors while standing above them and then climb down until below them.

2. I've often rapped from anchors that we backed up for all but the last person down, who removed the backup before rappelling themselves. In a few instances, the backup had to be placed fairly far above the anchor, requiring the the climber to climb up to the backup, remove it, and then climb back down to the rappel anchor.

Falling in either of these situations would have been an incredibly bad idea, and I didn't do it. But I recall at least one accident that occured many years ago in exactly situation number 2. A factor-2 fall on a tether extracted the bolt everyone else had rappelled from and killed the last person down. (But the tether in this situation was nylon, so this tragedy cannot be counted as evidence for nylon over spectra.)

Frankly, I find myself in sympathy with both sides of the argument. However, it makes sense to me that one's gear have the smallest possible range of "improper use." I retired my PAS (which I also found to be about a link too short) in favor of a Purcell prussik, but I don't think it is an ideal solution for climbing. The Sterling Chain Reactor looks like a better mousetrap.


tradmanclimbs


Jun 4, 2007, 2:42 PM
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Jim from sterling rope did some tests last year on slings and daisies. i am not suer if he broke any PAS in those tests but he did pretty conclusivly prove that spectry/dynema while stronger than nylon in slow pulls was drasticly weaker than nylon in drop tests. He broke a bunch of spectra slings in short drops designed to simulate slipping on to an anchor. One of his quotes from that session was " Nylon, the new miracle fabric" The results were posted on neclimbs.com


flamer


Jun 4, 2007, 4:07 PM
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Rgold.

Thankyou. That is exactly the information to which I was refering.
My reason for not wanting to say anything before is that I was gvien that info from a freind who is one of the head riggers and instructors for Rigging for rescue. He participated in the test's mentioned. I did not want to post it publicly because #1 I wasn't aware they had already made the results public #2 I didn't want to post their hard work, which is a part of their livelyhood.
The one qeustion I have concerning the post made by "charly"...I'm wondering if he was aware of the difference's in spectre vs. nylon daisy chains? He doesn't seem to make the distinction between the 2, which was apparently a big difference in the study mentioned.

Again thank you for your good post.

josh


papounet


Jun 4, 2007, 4:20 PM
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I have been in the situation described by rgold: having to move around above the anchor.
not so perfect solution: autoblocking knot on the rappel rope, extended by using a spare 7mm cordalette


One of the very few tether setup that provides safety from ff2 (apart from tying with the rope)

take 1m50 of 8,5 climbing rope
at one hand make a bight (doubleoverhand on a bight aka barrel knot for example)
put a locking biner in it
at the other end attach to your harness leg and belt
take 40cm of 6 cord
position an kleimheist knot on the rope
attach the cord to the belay loop

slide the knot to adjust tether
in case of fall, both the dynamic properties and the setting of the autoblocking knot would limit the maximum fall factor.

or use a modified Purcell setup (where the Prusik is made on a shorter strand to allow fthe full length of the cordelette to be used

or us the Kong Slyde

http://www.kong.it/doc408.htm

Although I used to like very much the combination dynamic rope + Ropeman, this report made me change my mind
http://www.hse.gov.uk/...df/2001/crr01364.pdf
This report "Industrial rope access - Investigation
into items of personal protective
equipment" tested:
Ropes
• Back-up devices
• Ascenders
• Descenders
• Lanyards: fall arrest and cow’s tails
• Knots: termination and prusik
• Anchorage loadings
• Rope protectors


(This post was edited by papounet on Jun 4, 2007, 4:26 PM)


healyje


Jun 4, 2007, 6:50 PM
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The R4R testing cited twice now is appears to not be available. I have just emailed them asking for the testing documentation or a link to it.

Again, I have no doubt their their results are as claimed. The issue is still whether they are relevant. With regard to the testing one has to know at exactly what forces did a PAS break and would those forces in fact be generated with a dynamic human being versus a dead static weight? And did the PAS break at forces far above what the human body can tolerate.

As for the scenarios Rgold cites, both would represent a gross misuse of any such device, daisy or PAS. It's simple - never fall from above an anchor onto a lanyard. The material of the lanyard is immaterial as it will generate forces which can seriously damage a human body and cause death if the lanyard doesn't break. In both the situations RGold cites an end of the rope itself is basically always available and that is what should be used instead. Again, the logic is entirely flawed - in any fall likely to break any lanyard dying will likely be the least of your worries and you should never have been using a lanyard for that purpose to begin with.


tradmanclimbs


Jun 4, 2007, 8:35 PM
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Healy, Sometimes you come accross as doing everything perfect all the time. Real life is not that perfect. On any given day I witness folks clipping in to raps with slings daisys etc in situations that could shockload the dynema pretty good. i even do it myself on rare ocasions. I do seriously doubt that the human body would break spectra in most if any of those situations but Nylon seems to be a no brainer as a sling material for anchoring. Nylon is stronger than spectra/dynema in a climbing aplication and it offers a slight dynamic efect. The weight saveings is negligable when compared to the excessive price and use restrictions of spectra/ dynema INMOP.


healyje


Jun 4, 2007, 8:49 PM
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Again, slipping of a ledge at an anchor (at or below the anchor) might likely hurt, but the force will not break a PAS. The only situation that could ever possibly break a PAS would be a gross misuse of it (i.e. a fully extended daisy-like fall) and will severally damage or kill you. The no-brainer is don't ever put yourself in that situation; or if, by some rare happenstance, you do - then use the end of the rope for a moment and don't use a lanyard made of any material as nylon will likely just result in you hanging there dead or wishing you were.

Also, I asked Metolius about the materail in the PAS and it isn't straight spectre - it's a special run of material the Metolius crew engineered specifically for the PAS. And given the R4R testing is apparently out in the open I've suggested Metolius contact them directly and also post up their own response here.

Edited to respond to the following

tradmanclimbs wrote:
Healy, Sometimes you come accross as doing everything perfect all the time. Real life is not that perfect. On any given day I witness folks clipping in to raps with slings daisys etc in situations that could shockload the dynema pretty good. i even do it myself on rare ocasions.

I'm by no means perfect and my climbing has always reflected playing at the edge of protection in that I've always free climbed on what most folks consider aid-only gear. To do that I have to understand the design utility of gear, it's limitations, and how I can best utilize what it offers for my own purposes. I also still rope- and free-solo and and apply the same understanding of limits there as well. And I've taken enough bad and hard falls over three decades on a variety of funky ropes to know I don't ever want to take a daisy fall on any material, ever. I use a PAS, but the first thing I tie into an anchor is the rope, I use the PAS as a second, longer point something like 75% of the time. Any situation where I am facing a daisy-like fall I use the end of the rope instead.


(This post was edited by healyje on Jun 4, 2007, 10:06 PM)


kixx


Jun 4, 2007, 10:38 PM
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To the OP:
If your Screamer only tore a little bit and you want to get some of it's original energy absorbing power back you could put a few wraps of duct tape around it. This is untested of course and too many wraps of tape could actually make it too strong.

For the daisy ; PAS debate:

I've switched to a prussic type of teather with 7mm cord this season and it's great. It's lighter, cheaper, and more adjustable than a daisy, although will need to be replaced more often (at little cost). In my mind the argument should not be daisy or PAS but why not a Purcell Prussic? If any body can dig up some dirt on this DIY device I'd like to see it. There are some good threads on the "lab" forum for this I believe.

To Flamer and Healy and the crew from VT:
Josh went about this all wrong.. if he didn't want to tell the whole story he should never have brought it up in a Public forum. I'm sure he's gloating now about how right he was despite how wrong he looked. From now on he should take a different approach to addressing a topic which he has some knowledge about so that everyone else will be more open to listening to him... and everyone else should just ignore posts like his designed to insight useless babble so we can get down to the business of actually discussing these things. 50% of this post is very useful.. but the other 50% was a waste of precious time. This is much more fun and informative if we keep the teenage quabbling to the general and community pages.

Thanks to those who had something to say here and weren't trying to win RC.com popularity aka "MR. Right" contest. Good info. (Flamer and Healy both had good things to say a few pages ago)


healyje


Jun 4, 2007, 11:25 PM
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kixx wrote:
In my mind the argument should not be daisy or PAS but why not a Purcell Prussic?

I would agree, in part, that it isn't about daisy vs. PAS - but the essential point is don't daisy fall on lanyards of any kind. It isn't a casual the - 'oh well, shit sometimes happens' sort of deal - several folks here keep making it out to be.

In reply to:
I'm sure he's gloating now about how right he was despite how wrong he looked.

Nothing could be further from the truth. Nothing in RGold's comments or his second reference to R4R's study change a wit about the facts of the matter at hand, the fact that it's a discussion about the wrong issue, or the the fact that the interpretation of R4R's results, whatever they may be, is completely misguided relative to using them to suggest a Nylon Daisy is in any way preferrable to a PAS.

It's actually a bit stunning that some simply aren't getting the basic concepts of 'gross misuse', that a nylon daisy is going to tear you up just as bad as a PAS, and any fall with a force that would break either with a real human body is probably not an event you'd want to live.


(This post was edited by healyje on Jun 4, 2007, 11:29 PM)


flamer


Jun 4, 2007, 11:35 PM
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flamer wrote:
My reason for not wanting to say anything before is that I was gvien that info from a freind who is one of the head riggers and instructors for Rigging for rescue. He participated in the test's mentioned. I did not want to post it publicly because #1 I wasn't aware they had already made the results public #2 I didn't want to post their hard work, which is a part of their livelyhood.


hey kixx,

Did you read this?
As far as I'm concerned I went about it perfectly.
I'd rather put something out there, no matter how vague, that will get someone thinking than say nothing.
Now there's no way i was going to post someone else's research, which is part of their livelyhood, without knowing it was already out there. Especially when i was only privy to that information due to a friendship.
As an "Entrepreneur" I expect you wouldn't like it if you discussed your business/ money making idea's with a friend, and they turned around and told the world before you could use it.

Now if you'll look back I didn't start being a jerk until I was "jumped" by other's. But I assure you and everyone, when attacked I will come out swinging. I have no apologies.

I did however PM several different individual's, who asked appropriately, with the information I had.

And I want to thank you for continuing the thing that you found bad about this thread. Even after the rest of use had clearly put it behind us.

sincerely,
Captain Gloating
aka josh


healyje


Jun 4, 2007, 11:40 PM
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Josh, again, you were 'jumped on by others' because your whole approach to this was just flat out wrong and inept as well. Even if you were to miraculously go away still thinking nylon daisies are in any way preferrable to a PAS, I would hope you at least figured out this isn't how such a topic should be broached or approached in an on-line forum.


flamer


Jun 4, 2007, 11:48 PM
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healyje wrote:
Josh, again, you were 'jumped on by others' because your whole approach to this was just flat out wrong and inept as well. Even if you were to miraculously go away still thinking nylon daisies are in any way preferrable to a PAS, I would hope you at least figured out this isn't how such a topic should be broached or approached in an on-line forum.

Healy,

You are wrong.
You were wrong to post the information I gave to you in private.
You are wrong about the PAS.
Your opinion means nothing to me.

I will "broach or approach" any subject in anyway I
choose. I do not care what a backstabber like you thinks.

josh


kixx


Jun 5, 2007, 12:01 AM
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Sheeesh - go climbUnsure


flamer


Jun 5, 2007, 12:04 AM
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kixx wrote:
Sheeesh - go climbUnsure

I'm back from climbing today...what did you do today Mr. business man?

josh


healyje


Jun 5, 2007, 12:07 AM
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flamer wrote:
healyje wrote:
Josh, again, you were 'jumped on by others' because your whole approach to this was just flat out wrong and inept as well. Even if you were to miraculously go away still thinking nylon daisies are in any way preferrable to a PAS, I would hope you at least figured out this isn't how such a topic should be broached or approached in an on-line forum.

Healy,

You are wrong.
You were wrong to post the information I gave to you in private.
You are wrong about the PAS.
Your opinion means nothing to me.

I will "broach or approach" any subject in anyway I
choose. I do not care what a backstabber like you thinks.

josh

There you go, now we certainly know a great deal more about each other than we did before. I explained my actions completely - if you can't back up a statement about a product, then don't make one.


greenketch


Jun 5, 2007, 12:13 AM
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I would tend towards agreeing with Healy on this one. In Largos new book he repeatedly emphasizes that sometimes you just need good enough. Now I could easily break just about any piece of gear that is out there. Would I survive the force involved if I was on the device that did it probably not.

Healy's point is well taken. Climbing is a heads up sport. You need to constantly be thinking about stuff which makes it easier to prevent failures like we are discussing.

Now in the rescue world rigging is done to a differant standard than we climb to. What is perfectly normal when I am climbing is just plain not good enough for hauling a litter and rescuers up a cliff.

I am all for advanceing the craft with better gear. I am not for throwing out a perfectly good piece of gear just because I can't accidently hang my truck from it.


flamer


Jun 5, 2007, 12:14 AM
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healyje wrote:
if you can't back up a statement about a product, then don't make one.


I encourage you to look at the last page, closely.

Fully backed up...

josh


majid_sabet


Jun 5, 2007, 12:45 AM
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This is one of the most advanced troll I have seen in RC .


Partner rgold


Jun 5, 2007, 2:07 AM
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Re: [healyje] Falling on a screamer. [In reply to]
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healyje wrote:
Also, I asked Metolius about the materail in the PAS and it isn't straight spectre - it's a special run of material the Metolius crew engineered specifically for the PAS. And given the R4R testing is apparently out in the open I've suggested Metolius contact them directly and also post up their own response here.

As I said before, I'm not trying to argue with either side here, I think both positions have merit. The real issue is understanding the limitations of the gear you choose to use, and having a clear idea of possible onsequences so that your judgements are informed.

With respect to the "specifically engineered" material in the PAS, Jim Ewing broke two new PAS's with a factor 2 drop test, so different material or not, lumping them with spectra slings is appropriate---they seem to break the same way.

By the way, Jim's test of other spectra and nylon slings seems to confirm the factor 2 R4R tests. Spectra broke, nylon didn't. But the canyoneering.net post also refers to problems with slings at much less than fall factor 2 drops. Unfortunately, one can't tell from the post whether the poster is describing "just" high impact loads or actual breakage for these less severe falls.

Dropping weights is a more severe test than dropping humans, because the human body doesn't arrive at the bottom all at the same time. (People speak of the body's ability to "absorb" fall energy, but I think there is relatively little such ability. Compressing soft tissue just isn't going to do that much.) How much less severe the numbers and results would be for a human subject is, I think, unknown. But many aid climbers have fallen on their daisy's, and I don't think the daisy's totally rupture that often, so the actual impact loads are probably significantly less than the results obtained with weights. We need some realistically weighted test dummies.

In any case, perhaps a more interesting question is what happens if one takes a factor 1 fall on various materials. This is a reasonable test level for tethers used "properly." The standard mathematical models and the scanty test data available predict something like 13.7 kN for nylon and 15 kN for spectra, both above the UIAA upper limit for damage to the human body.

Bottom line(s):

1. Don't you dare fall from above an anchor when connected with a tether.

2. Even if below the anchor, tethers ideally should have no slack. They're for weighting, not for falling on.


papounet


Jun 5, 2007, 5:37 PM
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Re: [rgold] Falling on a screamer. [In reply to]
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rgold wrote:
The standard mathematical models and the scanty test data available predict something like 13.7 kN for nylon and 15 kN for spectra, both above the UIAA upper limit for damage to the human body.

Please note that the those values were computed some long time ago from the maximum deceleration (12G) the army "felt" safe for parachute opening.
Harsher values would have meant more than 5% of broken soldiers arriving on the ground.

Which means that 12kn is not a magical threshold (below never an injury, above always an injury) , it is just an actionnable measurement.

One may think that a climber sustaining a 12G decelleration in a seat harness may have a higher risk of injury than a soldier using a full harness and having trained and prepared for this.

For more, read http://www.hse.gov.uk/...df/2003/hsl03-09.pdf


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