How long can you safely leave a permanent slackline set up?
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- Опубліковано 5 лип 2022
- How safe is your webbing if you permanently leave it set up. Wade Desai and Marshall Leaver from Steel City Slackers have a perma-line up in west virginia and when they replaced the webbing, Wade sent it to me and I tested it. It had a segment connection in the middle, it was up for 2 full seasons, I tested the sewn loops and the most used parts of the webbing. Until I finish the website with the new blog system, here are the results:
FYI: In all samples, the webbing broke in the back of the weblock
#1 - Backup 17.32kN
#2 - Backup 17.34kN
#3 - Backup 13.37kN!?!?!
#4 - Backup 20.64kN
#5 - Untensioned main line 20.53kN
#6 - Main Line 20.42kN
#7 - Main Line 17.82kN
#8 - Main Line 18.44kN
#9 - Main - part in weblock 20.26kN
#10 - Main - most used part 20.31kN
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What we are
00:43 - Wade shares the details
04:18 - Backup webbing tests
07:05 - Main line tests
10:50 - Balance Community's Latest Gear
14:42 - Spider Slackline's Latest Gear
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Ryan are we going to see any more drop tower tests soon? Was just rewatching the grigri/birdie video and you mentioned testing that on the tower, really hoping to see more
Everyone watching these super informative videos should go donate at least a little. The info I've gotten at your literal expense is priceless. Piece of mind in your gear and actually seeing when they break and how, keeps my mind from going into that place when I'm high up. Thinking about how something might break always gets me.
Yes! Bring back the slackline/highline content
What an amazing video, Ryan is definitely getting super good at presenting, it feels like he calmed down and became much more comfortable, keep it up my dude!
This was a great video. The way you talked through the break tests helped keep me tracking. It was a nice mixed bag of content. nice job.
Cool test. I have an old slackline (not highline) that has been up several times for 2-3 years at a time. Both in Alaska (year round) and in Washington (year round). Its just 1" tubular from REI and is probably from 2004? maybe 2005? Happy to donate it to test if that is of interest.
@@manners7483 I'm sure its compromised, and definitely not as strong as it once was, but its also 3-5' off the ground at most, so I'm willing to take the fall if it breaks. I'm curious how strong it still is given its very long service life and extremely prolonged exposure to sunlight, rain, snow, freeze/thaw, etc. I would certainly never use such old gear higher up. Still walks just fine, its currently set up in the woods on my property, maybe leave it up another 2-3 years unless there is interest in break testing it...
Hey Alexsandr, I would slack on it under 50 feet but I wouldn't trust nylon that old that has been perma-rigged. 3 Years of new webbing up is probably my max comfort level even though that is still probably super good enough.
@WungusBill Could cause overconfidence too. This is always the problem with gear and why we want such high safety margins. You can go for twenty years with your gear not failing, and then the _one time_ it goes, you die. And as this video shows, even though almost everything is still up near MBS, one link in the chain was way lower than it should have been.
Loving the quick gear reviews, it's hard to keep up with all the innovation, a good thing tbh
Seneca ROCKS!
what he said ^
I've had 2 ropes left out hanging from a massive mountain ash in a remote forest in Australia for the past 2 years.
I've done hundreds of SRT climbs on them .
I'm a rec climber and arborists all tell me I'm playing Russian roulette but I have faith in the Donaghy Cougar Blue I use .
After i saw a UA-cam video that break tested 10-30yr old caving ropes I decided I'll be fine .
I'd love to see arborist rope that's been used and abused break tested on your channel .
I've only done one arborist rope new vs old so far. Hope to do more ua-cam.com/video/xwajKp7x1X4/v-deo.html
@@HowNOT2 Btw that was a poachers knot , not a stopper knot in your video.
Also were the arborist ropes you tested rigging ropes ?
The rule is you never climb on your rigging rope .
The most common arborist climbing rope is 11.7mm static Kernmantle .
That would definitely be a great video to see new vs old break tested .
Love your videos and channel and keep up the great work mate cheers from Australia 🦘 👍
I met Wade a few weeks ago at Summersville Lake near the NRG. Super cool guy!
aw man, thanks! Right back at ya!
Prefer separate break/test and how-to videos. Love the carnage of break tests. Watchlist the how-to videos to come back and rewatch as I'm trying things.
Is there a way to test the effect off bird shit on the webbing? would love to see that.
I wouldn't walk on that.
Great video and very nice to hear the full rig description!
Lift2be is just curly like that, I think the weave pattern causes it to be like that in its resting state after the fibres have shrunk back down.
after we derigged this, it was crazy to see how stiff it became. Especially the tensioned mainline; I sent the scrap pieces to Jerry at BC (after cutting off all the samples I sent to Ryan), so he could put sewn ends on and I could use them as park lines. He messaged me before putting the bartacks in to make sure I didn't plan to use it to highline, lol. It legitimately feels like cardboard in places.
Alright , i watched a ton of your videos , i guess its time to sub. Also i swear i feel like i know bobby from some where, i grew up in cali so who knows maybe we have met...
How do I send Wade a message? I'd love to link up! Also thanks for all you do Ryan, it's hella appreciated man.
Hey Ryan, unless it’s already been done on break test - perhaps you could test climbing ropes on devices such as the micro-traxion / ropeman. Interesting to see potential damage to sheath or core, and other scenarios.
Definitely want to see this. I see too many people using micro-traxions as belay devices, particularly for followers, when they explicitly say it can cause damage
I need more sunlight tests
Thank you for your amazing and amazingly important work @HowNOT2
To the paradigm webbing... Is 22,2 kn MBS super good enough for highlining or is it a bit low 🤷
I was surprised to see this after the discussions if pink tube is strong enough. And it has an MBS of 25,6.
Sweet video Ryan! Do you have a video about establishing a new highline location? What to look for? Maybe even going from using google earth to on location to when you start rigging.
ua-cam.com/video/j0ZvRM5lt6Q/v-deo.html
Would like to see a similar breaking strength test on the regular paradigm without sleeve .
More slackline videossss !!
I was wondering if i could get you to do a video on seizings for climbing rope. I’ve never seen anyone use a seizing, instead of an eye splice or stitching, and i wondered why, since it would seem to be more economical. And i wondered how well it would hold up strength-wise, vs splices and stitchings.
hello at 21:06 what is webing tools name? and also 21:10 what is brand and series for webbing sling tensioner
Intereseting video as always.
Do you consider the nylon degradation caused by UV radiation?
A possible explanation for the 13.4 test and the maybe wrong assumptions driving it:
1) Webbing is just many small strands woven together, so the strength of the webbing over some small length scales with the number of in-tact strands in that small length.
2) Damage and wear to some length can be modeled as cutting some number of strands, even if in reality all the strands in some length are probabilistically weakened
3) Damage is ultimately randomly distributed at the microscopic level
4) The "small length" in (1) above could be measured by cutting say 10% of strands at one location in a piece of webbing, then cutting a different 10% of strands this "small length" away along the webbing. If it breaks at ~85% rather than 80% or 90% then the "small length" is set correctly. I'm assuming this is something less than ~1 meter.
Under these assumptions the cutting of strands due to wear can be modeled as a poisson distribution. The line can then be divided up into "small lengths" as defined above, and each of these lengths has the opportunity to accumulate cut strands independently of the others. This can also be modeled with poission statistics. The resulting distribution should show the probability of happening as a function of the number of cuts per "small length."
I suspect that on such long lines, such highly weakened segments could actually be somewhat expected. Since a line only needs to break in one place, the lowest break strength results seem to hold the most consequential information.
Great video. Any theories on the lower backup break?
@@manners7483 I agree, I think this is the most likely explanation. This line is in a holler that restricts how much direct sunlight hits it through the day. I sort of want to believe that that one outlier (the 13kN sample) may have been in just the right spot to catch more sun on average than the rest of the line, causing it to have the drastically lower result.
@@manners7483 that wavy nature of this specific webbing is actually the way it comes when brand new. It goes away with tension and UV in my experience.
This might not be relevant to this vid but im posting here because its your newest. Some break testing I would love to see is tied vs sewn slings. What knot is best (also considering different sling material and flat vs cordelette)(never found info on making a sling with a retraced double or tripple overhand, if a waterknot is often used why not one of these?) If I tie a sling from a single cord that holds lets say 20kn, how much would it hold? More, less? Probably knot dependent? Love your channel, gained lots of usefull info here. Pls keep it up!
Oh and anotherthing. I hear slings get weakend by knots, but for all applications except alpine quickdraws I knot my slings. So is a tied vs sewn sling really weaker if both will be knotted anyway?
What's a bommer tree?
What's your take on the incident involving a pink tube breaking during a fall, after a permanent rig of less then a year?
the one that hit the ceiling during a whip? There's a bunch of pinktube failures; gon' have to get specific, lol.
How not 2 highline?!
I didn't expect to see that again
I prefer if the gear review is a separate video
3 days. That's my final answer.
More videos like that
1:1 safety ratio = free solo
I am wondering: how often does the mainline break in real life?
International slackline association has recorded incidents but who knows if there are some that goes unrecorded
@@joshstagg148 thank you very much for your answer!
Local climber told me he too ropes a route clean for the first time to find his quad was chewed by critters overnight … big yikes
I dont think I would keep something up this long in a desert. It would be nice if you could have measured hours of sunlight. This seems semi protected with the trees and more overcast days than an arid location.
for SURE. this is in a holler that restricts how much direct sunlight hits it through the day. I would absolutely imagine this would have different results if in the desert. I sort of want to believe that that one outlier (the 13kN sample) may have been in just the right spot to catch more sun on average than the rest of the line, causing it to have the drastically lower result. *shrug*
Neeesh
in industry we have 10 to 1
As an arborist, that poor tree
lmao
The question is can an average Merican being 240lbs plus actually safely use a slackline without feeling like their wearing a dental floss thong.
Anyone will feel that way if they put the slackline up the crack. I like it along my thigh :). It's super safe enough.
get to the point. I don't need 22minute vid
Is this in a state or federal park?