What Happens When You Fall?
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- Опубліковано 10 лют 2025
- For clarification:
Never exceed SWL (safe working load) on climbing or rigging gear. If you don't know how to figure out SWL, its 10% of the MBS (minimum breaking strength). In some cases, rigging equipment is labelled with a SWL that is 20% of MBS. When in doubt, yield to the 10% rule. Rigging gear is protecting the lives of the men and women working below and is just as important to follow the rules for it as it is to follow the rules for climbing gear.
The enforcer is sweet!!!!! Great video, those numbers are important to know.
It absolutely is. My local arb supply dealer let me borrow it. They're super cool folks.
Wow this video has a wealth of information! A real eye opener. 🇨🇦🇺🇸
Thanks, I certainly learned a lot from playing around with things
Interesting experiment Zach. Bring the load cell the next time you stop by I have some ideas for some tests. Happy New Year!
Haha okay, I'd be interested to hear you thoughts! Happy new year!
Two of the biggest factors that will change the forces are the stretch rating of the rope and the length of the rope. 16 strand ropes should stretch more than kernmantle and put way less force on you. Also stretch is a percentage of the rope. So if you're base tied the forces should be less than canopy tied because you have 2x amount of the rope to stretch.
Absolutely! For the most part, I believe most climbers pursue low stretch ropes for SRT and DRT will be stiffer even with a more dynamic rope because the line is doubled. We did all of this on a base anchor, and I think the friction at the union might have kept the anchored side from absorbing a ton of shock, but I imagine it helped atleast a little.
The amount of rope in the system makes a big difference. I imagine that is why the forces were so high on the crotch test.
That may have played a part, but I think the mechanical advantage may have likely played a bigger part. Thays just my speculation, though. I didn't wanna try the crotch test at height 😅 If I remember correctly, there was probably 30 feet between the anchor and the load in the first part and may maybe 12-15 feet of rope in the second part. Also the rigidness of the anchors probably played a part 🤷♂️
You guys are having too much fun!😊
Great job, y'all are crazy jumping off ladders like that 😅
The fall never hurt anyone. It’s that sudden stop at the bottom… I fell about 30 feet when I was 18…and fell about 18 feet when I was 30. I was climbing the next day the first time. The second, I was stove up for days.
Oh wow, that's intense. Glad to hear that neither one of them were life altering. I'm just starting ti get old enough to not spring back like I used to. Don't love it.
Negative rigging heavy wood and the force of pulling heavy leaners over would both be interesting. I've seen some instances where everyone assumed 3/4 bull rope was indestructible but honestly it was probably overloaded well beyond a safe limit.
I'll see what I can do with those ideas. It'll have to wait until I have just the right tree 🤔 we might be getting into forces higher than that thing can measure. I think it's only good for 4500 lb. We might be able to do it on a smaller scale to atleast illustrate the principle
If you can get your hands on some high stretch rock climbing rope it'd be fun to compare it vs your static line. I imagine the forces should be drastically lower.
Stay tuned for next week's video 😎
yep climbing ropes are noodles!🍝
very interesting, dont want to know the force when i drop chunks into rope.. .:D
Very interesting real world demonstration.
Thanks, I won't be doing it again with live people 😅
In Europa the testing with two people System before klimbing is now mostly Not used. The idea is that by loading the tie in like that you are more likely to Start a krak that will them possibly fail sooner.
Great Video nontheless
I think I've heard that before which I kind of understand. I feel like it's an idea built on flawed logic, but I'm sure that people smarter than me came up with it 🤷♂️
@@zaccheus jea i think its just something someone decided and thats what is done now. Not sure if it makes sense but thats how it is
@@sempi8159 sometimes it's best to follow the rules for liability reasons if nothing else
Hi Zacheus, can you please measure with this load cell how much weight you can lift with GRCS in one person? In November we were lifting and then lowering some big piece using ATD (similar to GRCS) and the ATD is rated for 1300 kg, but the groundman was barely able to lift that piece which we calculated it had only 700 kg.
Ohhh, that's a very interesting idea. I think the GRCS is supposed lift as much as 1360kg but I've never really tried it. I also know that rigging blocks and pulleys are not perfectly efficient. I think I heard once that they can reduce pulling force by 10% per block 🤷♂️
zajímavé
The crotch is floating & anchored to a rope. You've eliminated the ability for the tree to compress down the limb. This test was basically a rope test.IMO
STAY SAFE
Thanks for your thoughts! I don't think the compression of the stem would change that much under a relatively small load like this. If it had a little lateral movement, that might play into things, I guess. Either way, the purpose was more to test how much the friction in the crotch played a part in the system than how much the tree compresses.
Each ladder rung is 12" apart
Easy way to know how tall the ladder is count each rung that will give you the length of ladder
So actually your 3ft was actually a 4ft drop your buddy was standing on the 4th rung your 5ft drop was 7ft drop because he was standing on the 7th rung
Yeah, thays how we measured them. But our "zero" was actually the first rung. So a drop from the fourth rung was really only a 3ft drop comparatively.
Quite interesting!!
This is crazy to me I always thought if you do SRS if you do double rope whatever if you even fell 10 15 ft the rope will catch you every single time this really opens my eyes to where you need to have your slack pretty much tended at all times in case you would slip I understand a foot or two maybe three but if you have like 5 to 10 ft of slack and you fall I wrote might snap am I thinking correctly Zach God bless thanks for video
Yeah Bill, I think you're probably right! A fella I was talking to was telling me that at 1200lb of force, organs start to detach from their places. I'm sure a 10ft fall would do more than that. I think I've heard that it's a good practice to keep slack from getting below your knee that would probably limit a climber from ever falling more than a foot or two.
@@zaccheus yeah you're exactly right I'm definitely going to start doing that so do you believe if you had 10 ft of slack and you fell you think your rope would catch you do you think it would break
@b r well I might just have a video on that coming out next week. Stay tuned 😎
@@zaccheus thank you buddy
You try it on the akimbo? Why you switch to rope runner?
The Akimbo is my favorite device. I just use the rope runner becaise it's a little cheaper to maintain. I don't think the device changes much how the rope of loaded, or atleast it shouldn't 😬
Good to hear i climb on akimbo but am always concerned about making sure the slack is tended. Somewhat always thinking it will run if not cause it does with just being on the line unweighted but it has a lower cam so I don't see how it could just tough transition mentally with possible freefall not possible from hitch I'm used to. It is nice tho I dig it too.
A knee ascender will also help it's longevity. Although your rope walker system is dope.
@Garrett Oetken I've wondered if walking on it like I do would put additional wear on it. It might, but I think it would be ever so slight that it wouldn't be noticeable if I did start using a knee ascender. All speculation 🤷♂️
It sounds like your akimbo is falling down the rope when the climbing line is slacked. If it is, it's technically out of adjustment by Rock Exotica standards if I remember correctly. I've definitely run it that loose before too, but for the reasons you mentioned I ended up tightening the top cam uo a bit as I recall. It might Al's be worth checking the movement of the spring loaded cam on the top side. I had mine very a gunked up and stop moving under its own spring force.
Just stumbled across this video and I recognize Joel lol hope Petrarcas treating him well
Lol, that's wild 😂 I think they are
@@zaccheus what area of Ohio do you work in? I just stumbled across your UA-cam and realized I was holding your Protos at Endor’s about a month ago lol
@@urboi2054 lol, that's great 😂 I live just south of Hartville. I'll pretty much drive up to an hour to climb a tree. I'll also do short trips farther away. I just got back from a two day gig in Cincinnati.
Good thing I don’t use my Zigzag as fall arrest. 😮😅
Haha, that sounds like good climbing to me
@@zaccheus 😂
Nice work, adventure arborist out side of the box,,,
Haha, I like that perspective
You should contact Richard Mumford, and get 💡, he's extremely experienced in these forces .and could help out
Thanks for the tip! I definitely feel like I have seen his name before 🤔
@@zaccheus bro your missing out genius...going to buy his new hitch hiker .he has best footassnders .he made thecsaka knee assender..his website climbing innovations. He's beyond well rounded and does theses tests you could get ideas and wealth of knowledge can't believe guy like you don't watch Richard, s content it's endless.its game changing. Guy can climb and invent.
@@zaccheus I order alot from. There .got my drum for unicender there. And he has best friction hitch game out there .he's incycopedia of 🧗♀️...you should get with him .nice guy..
@@zaccheus I meant he's a genius
@@zaccheus lol
This gave me anxiety 😂
Nice 😊 😲🤙👌
Thanks Leonard!
im seeing a trend here, im gonna shut up about overloading my stuff LOL
Lol, I hope I haven't given you too much crap 😅 None of this is directed at anyone. It's for the benefit of everyone includ8ng myself. I learned a lot playing around with this stuff 😬😅
@@zaccheus nah, no such thing as too much crap in my vocabulary
@@WoodCutr1 lol glad to hear it 😂
the goal is to not fall i heard the pelvis can hold 900 pounds!
Absolutely! I've been told that organs start moving out of their cavities at 1200lb 😬 so it's definitely not something we will be trying with live people again. Certainly a reason to keep slack tended! 😁
i enjoy your vidéo à lot :but keep safe!"
@Luc Fournier I'm glad to hear that, thanks Luc!
Stunt men in training.
Lolol, that's a stretch 😂
I have learned much; you are so intelligent. You do things that I do mot even think about; that are relevant.
I detest ladders; you just hate them. Give me a climbing system any day.
Stay safe and ejoy climbing!
Thanks! That's mighty kind of you to say!
Lol, it must be a climber thing then. Only real climbers understand 😅
I would be curious to know the size of the branch-union that the rope was pass through, or on. An amazing test to do would be a union break test to see the average weight resistance of it, lets say like a 4-5 inch, and on slightly different branch angles.
That would be mighty interesting. There are so many variables packed into that. Species, union angles, reaction wood, supporting wood spar length and load... so many things