The ropes are durable and just like the ones at the gym. th-cam.com/users/postUgkxTFxba6lNeHrZaHoY_LXe6ZzmMfaipnwu Caution: I bought the 50 feet ropes and they are long and heavy so make sure you have the space (I do have the space). If I was to do it again I would probably get a shorter version as 50 feet (25 feet each side) is a little long.
Nervous about the exam??!?? How about "nervous about being able to use this to save a life" ?? What good is an A on an exam if you can't apply this when someone's life depends on it?
I am suscribing based on this video because you make the instructions extremely clear both visually and auditorily, particularily for a novice like myself. Additionally, your video starts off and ends based on all facts, no mumble jumble blah, blah, blah or crazy background noise/music. Thank you so much for helping others, greatly appreciative of your time and knowledge. I look forward to viewing your other videos. God Bless!
Rule 1: knot at anchor is always even Rule 2: knot at load is always odd Rule 3: last pulley at the anchor is a COD Rule 4: Count # of pulleys besides any COD’s and add 1… that gives you your MA Rule 5: A simple pulling on a simple is a compound system… multiple both systems and that gives you your MA.
@Bobby T Yes!!! Thank you for this practical, helpful explanation! I spent my evening in the hay loft of my horse barn trying to figure out how to use my pulleys to lift my hay elevator up and down by myself. Sick of having to ask my neighbor for help. There's got to be a way. So I came in the house and started looking it up on TH-cam and I found this video, which is great, but come on, I'm 43 years old. I'm not trying to memorize answers for some 4th grade science quiz. I've got a farm to run here, and actual real-life problems to solve. I just need to move my dang hay elevator! Really don't care if it's even or odd or what's the proper term for each end of the rope. the only "change of direction" that matters to me is UP. As in get the HAY UP and in the BARN before it starts snowing again here in WI. Your explanation, with the cow example, is a beautiful illustration of why our education system needs to support the trades. Mechanics, welders, electricians, plumbers, heck just a guy who is handy and knows how to fix things - that is the foundation for everything else we may hope to accomplish as a human race. Theories are fun, but we have got to be able to get things done. Sorry for the long rant, I'm very tired.
Nothing in life is free, indeed. Youre telling me... The tradeoff for mechanical advantage is NOT JUST more feet of rope you have to pull but MORE TIMES you have to adjust the pulleys once they 2-block each other. And every time you adjust the pulleys so that they dont 2-block, you need to tie off the load somehow which can require more than 1 extra piece of equipment to do so. And if the load is really far away from your setup you may need some especially long rope(s) running through the pulleys to make the magic happen in a timely manner with less resets and interruptions.
None of these show how to thread a double clothes pulley... All they show how to put a pulley on a pulley... I am asking, which was the rope goes in on the left and from where does it finish.. I need your help..
What is needed for the strength of the rope and pully(s)? Hypothetically, if I'm lifting 1 ton with a 3:1 advantage, does the rope need to be able to handle the full ton? Or only 1/3 of a ton because of the MA? Same question for the strength of the pully(s).
If we place them horizontaly one after the other up and down or if we place them vertically one below the other do the two orders have any difference in the lifting power or the lifting power still remains the same ?
Great video. One question, suppose you have a rope that can hold 300 kilograms. Putting more weight on the rope would snap it. Does this 3 to 1 imply you can lift a weight of 1000 kilogram even if the rope would snap pulling 300 kilogram when used as a single line?
sadly, no. the weight/load, if tied off at the anchor, can EVEN be greater than the initial item being lifted, at the anchor. i've been led to believe. i'm not a rope/pulley scientist, but the mechanical advantage gained from all the pulleys you can throw at a weight, at some point have to be supported at a point ... if you have the same 300kg single line holding your 1000kg system at that point .... my guess is "snap"
No. You never want to exceed the weight limit of the rope or the anchor. You can easily apply to much mechanical advantage in a system and break rope and hardware and destroy your anchor.
Mike , if I would want to pull a 12,000 pound object you are telling me I should us a 12,000 pound rated rope ? If this is true the only advant@ge of a pulley set up is to make pulling the 12,000 pound object easier. Correct ? Thank you.
Can’t you gain a mechanical advantage simply with two pulleys by sizing one larger than the other? Without having to loop multiple passes through many pulleys?
250 is nothing for any rope access pulley. No need to get an expensive, high efficiency pulley. ISC has some good ones at a better price than fancier pulleys like PETZL or Rock Exotica.
4:50 ==Ten-to-One MECHANICAL ADVANTAGE!!!. So, if you pass your last rope through a simple pully hung at the top, the you could pull down, instead of up, correct??? Another question::: Having to pull ten times rope-length, which does NOT appear to exist in your demo??? THen what??? thanks.
One would reset the piggy-backed line by sliding the prusik back down. A progress capture device-like another prusik-is used at the anchor to hold the load while the reset is done.
Kareem If you added an additional pulley at the top of the blue rope you could pull down. To reiterate, your first blue pulley is on the bottom like in the video. Then you add a final blue pulley to the system at the top. But this last pulley would be a redirect and give you no more mechanical advantage (rule #3). It would still be 10:1. At least that's how I see it, but I'm wrong 51% of the time.
@@trevorlsadler Thanks for the tips guys. I also conducted some simple pulley-experiments of my own. I documented one of them at this link, which directly opens, but, only if you open it into an "INCOGNITO-BROWSER". So, right-click on it first, then click "incognito". th-cam.com/video/WR9cDF8pDt0/w-d-xo.html&lc=Ugx6HDOB7OcS1T5fJRh4AaABAg
this vid is my fav and helped me the most so far. so I'll try to apply what I learn here to more stuff to "figure it all out". though I am confused about last part still unless I'm making innocent mistakes. the 2 to 1 at the end there, i have 1 or 2 problems with? it looks like to me in theory like it's doing nothing? like it's the same as if you just tied the original rope off on the ceiling (which might do literally nothing?) but u throw in a pully (which would be exactly the example you asked about in beginning of your question oddly enough) in order to just pull or move the rope some more. wouldn't that last pully be nothing more than a change of direction anyways (meaning you are simply making yourself another physical part of the anchor thus adding no extra strength or mechanical advantage). so then I started thinking okay so what if I added another pully at the end then that new one would become my change of direction making the rest another 2 to 1 advantage (and here is where I'm most likely making a mistake as I personally don't understand how that simple 2 to 1 is multiplying the 5 to 1 to make it 10 as in my mind it's literally nothing more than just another 2 to one on the original system. But let's put all that aside and just look at the exact system in the video at the end there even if the last part multiplies the rest it still looks like not a 2:1 but 1:1. I notice he has the end of the rope draped through the pipes on the tower which sparked me thinking if he pulled on that it would kinda make it a 2:1 (except it's not a pulley so adds friction so you're pulling against yourself as much as the rope based on the diameter of the bend and surface tension so uh i guess cancels out a significant amount of mechanical advantage) uhoh now I'm looking at the 5:1 part and yeah I know he has 4 pulleys but according to the rules isn't the last pulley not a pulley but a change of direction. well I feel pretty stupid now so if nothing else hopefully the time you took to read this comment is worthwhile entertainment. but if the 5:1 is actually a 4:1 and the 2:1 is actually a 1:1 wouldn't that just make it an 4:1 (or if multiplied 8:1) . I'm sure the entire rest of the video is 100% correct no doubt. I'm just personally trying to find errors in setting up a tarp for camping wrapping around a tree using a truckers hitch (which personally I think the friction on the bark of the tree counts as NO ADVANTAGE and the truckers hitch is literally the only pulley meaning it's a change of direction adding NO ADVANTAGE. haha this is hilarious subject to ponder thanks anyone who read this far and loveya clearly i have more thinking to do if i'm to understand pulleys. oh one last thing the next step as orignal comment reminded me, testing the lenth of rope pulled to the distance moved by the load if it really was 8 to 1 or 10 to 1 that'd suggest it's working to whatever extent. this is kind of importatn too cause thinking of example where you are pulling thousands of pounds in survival situations like winching a car one guy showed by doing a simple 2:1 (which I think consisted of nothing more than anchoring the line back on the winch or something) clearly showed one side of the load moving twice the distance of the other side supposedly putting to rest debate on the subject. I think I'll have to go start testing stuff personally to figure out where my confusion lies as I don't want to be a liability in a dangerous situation haha sorry for making anyone read my long comment but who knows maybe i did find innocent mistake or once i "figure it out" can explain easier to others
@@rho2888 You can run all pulley test really cheaply, without pulleys, but with steel O-rings, available at tool stores, real cheap. After documenting your test results, then, if you need to use it for lifting heavy stuff, you can advance to using marine-pulleys, and marine-ropes, because they are the most compact & the strongest!!!
Hello I work for a city in the northeast, I'm currently working to renovate a town hall clock. Was hoping I could email you with some questions on mechanical advantages. T.I.A.
Anchor? Hall team? Please define your terms. I don't know what you're saying. Also, you say "rule 1: if IT'S at the anchor, it's even, if IT'S tied off at the load it's odd." What is "IT"?!?
This is me, 7 months later, I'm going to attempt to answer my own questions. Hall team is.... um, I still don't know. Anchor is basically the end section of the rope, (no more pulleys) either it's tied off (anchored) at the top or bottom, or else your own hands take the place of a tied off point, so your hands are basically the anchor. Lastly, "IT" is the rope. Did I get two out of three?
This is by far, the easiest way I have ever heard, theory of pulley system explained. Thank you very much.
The most simple and direct information as of yet!!!
I reference this video all the time. Great knowledge. Perfectly explained.
I’m storing this in my files .
@@christinamoneyhan5688 I can’t express how great this video is for the learning process! I teach it exactly how he explains it!
The ropes are durable and just like the ones at the gym. th-cam.com/users/postUgkxTFxba6lNeHrZaHoY_LXe6ZzmMfaipnwu Caution: I bought the 50 feet ropes and they are long and heavy so make sure you have the space (I do have the space). If I was to do it again I would probably get a shorter version as 50 feet (25 feet each side) is a little long.
That guy knows what he's talking about! Great video
Ive been waiting on this video -- excellent instruction !!!!
Great video! The information was easy for a newbie like me to understand. Much appreciated.
I'm taking a rope rescue course in fire academy. I was nervous about the exam untill watching this. Thank you
Nervous about the exam??!?? How about "nervous about being able to use this to save a life" ?? What good is an A on an exam if you can't apply this when someone's life depends on it?
I am suscribing based on this video because you make the instructions extremely clear both visually and auditorily, particularily for a novice like myself. Additionally, your video starts off and ends based on all facts, no mumble jumble blah, blah, blah or crazy background noise/music. Thank you so much for helping others, greatly appreciative of your time and knowledge. I look forward to viewing your other videos. God Bless!
This video made CD and MA so easy to understand! Evry other video Ive seen makes it overly complicated for some reason.
This is awesome. What's a good video to start with if I were training to use these techniques in the field
Great video. Would you please share what kind of knot you use to secure the rope to the anchor point?
I always wondered if adding a 2-1 or 4-1 on the "pull rope" was beneficial or not
Well done. Thanks for the detail.
The music got me, man ... dig it. New Subscription.
Rule 1: knot at anchor is always even
Rule 2: knot at load is always odd
Rule 3: last pulley at the anchor is a COD
Rule 4: Count # of pulleys besides any COD’s and add 1… that gives you your MA
Rule 5: A simple pulling on a simple is a compound system… multiple both systems and that gives you your MA.
@Bobby T thank you
@Bobby T Yes!!! Thank you for this practical, helpful explanation! I spent my evening in the hay loft of my horse barn trying to figure out how to use my pulleys to lift my hay elevator up and down by myself. Sick of having to ask my neighbor for help. There's got to be a way. So I came in the house and started looking it up on TH-cam and I found this video, which is great, but come on, I'm 43 years old. I'm not trying to memorize answers for some 4th grade science quiz. I've got a farm to run here, and actual real-life problems to solve. I just need to move my dang hay elevator! Really don't care if it's even or odd or what's the proper term for each end of the rope. the only "change of direction" that matters to me is UP. As in get the HAY UP and in the BARN before it starts snowing again here in WI. Your explanation, with the cow example, is a beautiful illustration of why our education system needs to support the trades. Mechanics, welders, electricians, plumbers, heck just a guy who is handy and knows how to fix things - that is the foundation for everything else we may hope to accomplish as a human race. Theories are fun, but we have got to be able to get things done. Sorry for the long rant, I'm very tired.
Rule 6... there is no rule 6.
Great video! Nothing in life is free except for this information about pulley systems.
Nothing in life is free, indeed. Youre telling me...
The tradeoff for mechanical advantage is NOT JUST more feet of rope you have to pull but MORE TIMES you have to adjust the pulleys once they 2-block each other. And every time you adjust the pulleys so that they dont 2-block, you need to tie off the load somehow which can require more than 1 extra piece of equipment to do so. And if the load is really far away from your setup you may need some especially long rope(s) running through the pulleys to make the magic happen in a timely manner with less resets and interruptions.
We use progress capturing prusik cord for a quick and easy reset.
None of these show how to thread a double clothes pulley... All they show how to put a pulley on a pulley... I am asking, which was the rope goes in on the left and from where does it finish.. I need your help..
Nice video well explained.
Yes it is easy to understand. Good, i can calculate that case👍
What is needed for the strength of the rope and pully(s)? Hypothetically, if I'm lifting 1 ton with a 3:1 advantage, does the rope need to be able to handle the full ton? Or only 1/3 of a ton because of the MA? Same question for the strength of the pully(s).
Love educational T.V.
hy Mr Mike Meggard, your video so very great, thanks for sharring.
If we place them horizontaly one after the other up and down or if we place them vertically one below the other do the two orders have any difference in the lifting power or the lifting power still remains the same ?
Which 6mm rope for a pulley would you recommend?
Well done. Pulleys for people like me.
I learn a lot about rigging and lifting form Philippines rigging industries
3:48 isn't counting the pulley closest to you breaking a rule? I thought it was just a redirection (in this case upwards) so a therefor a 4:1?
Nice one useful
Did you use brass knuckles
Thanks 🙏🙏
Great video. One question, suppose you have a rope that can hold 300 kilograms. Putting more weight on the rope would snap it.
Does this 3 to 1 imply you can lift a weight of 1000 kilogram even if the rope would snap pulling 300 kilogram when used as a single line?
Yes
Good question. Can anyone confirm mike millars answer???
sadly, no. the weight/load, if tied off at the anchor, can EVEN be greater than the initial item being lifted, at the anchor. i've been led to believe. i'm not a rope/pulley scientist, but the mechanical advantage gained from all the pulleys you can throw at a weight, at some point have to be supported at a point ... if you have the same 300kg single line holding your 1000kg system at that point .... my guess is "snap"
No. You never want to exceed the weight limit of the rope or the anchor. You can easily apply to much mechanical advantage in a system and break rope and hardware and destroy your anchor.
Mike , if I would want to pull a 12,000 pound object you are telling me I should us a 12,000 pound rated rope ? If this is true the only advant@ge of a pulley set up is to make pulling the 12,000 pound object easier. Correct ? Thank you.
74 comments, and not one mentioned the incorrectly assembled truss tower, center screen. Apart from it, the content is good, digestible stuff.
Can’t you gain a mechanical advantage simply with two pulleys by sizing one larger than the other? Without having to loop multiple passes through many pulleys?
The pulley is the most egotistical of all machines.
It’s always the centre of a tension.
What about the diameter of the pulley?
Excellent.
Outstanding
what would you recommend for a home gym pulley? I want something very smooth and capable of handling up to 250 lbs.
250 is nothing for any rope access pulley. No need to get an expensive, high efficiency pulley. ISC has some good ones at a better price than fancier pulleys like PETZL or Rock Exotica.
SMC CRx crevasse rescue pulley
$16.99 and will more than handle whatever you can lift in the gym
Nifty lift
Fantastic
Mantapppp 👍👍👍👍
great video. what kind of knot does he adjusts at 4:20...?
That is a Prusick
4:50 ==Ten-to-One MECHANICAL ADVANTAGE!!!. So, if you pass your last rope through a simple pully hung at the top, the you could pull down, instead of up, correct??? Another question::: Having to pull ten times rope-length, which does NOT appear to exist in your demo??? THen what??? thanks.
One would reset the piggy-backed line by sliding the prusik back down. A progress capture device-like another prusik-is used at the anchor to hold the load while the reset is done.
Kareem
If you added an additional pulley at the top of the blue rope you could pull down. To reiterate, your first blue pulley is on the bottom like in the video. Then you add a final blue pulley to the system at the top. But this last pulley would be a redirect and give you no more mechanical advantage (rule #3). It would still be 10:1. At least that's how I see it, but I'm wrong 51% of the time.
@@trevorlsadler Thanks for the tips guys. I also conducted some simple pulley-experiments of my own. I documented one of them at this link, which directly opens, but, only if you open it into an "INCOGNITO-BROWSER". So, right-click on it first, then click "incognito". th-cam.com/video/WR9cDF8pDt0/w-d-xo.html&lc=Ugx6HDOB7OcS1T5fJRh4AaABAg
this vid is my fav and helped me the most so far. so I'll try to apply what I learn here to more stuff to "figure it all out". though I am confused about last part still unless I'm making innocent mistakes. the 2 to 1 at the end there, i have 1 or 2 problems with? it looks like to me in theory like it's doing nothing? like it's the same as if you just tied the original rope off on the ceiling (which might do literally nothing?) but u throw in a pully (which would be exactly the example you asked about in beginning of your question oddly enough) in order to just pull or move the rope some more. wouldn't that last pully be nothing more than a change of direction anyways (meaning you are simply making yourself another physical part of the anchor thus adding no extra strength or mechanical advantage). so then I started thinking okay so what if I added another pully at the end then that new one would become my change of direction making the rest another 2 to 1 advantage (and here is where I'm most likely making a mistake as I personally don't understand how that simple 2 to 1 is multiplying the 5 to 1 to make it 10 as in my mind it's literally nothing more than just another 2 to one on the original system. But let's put all that aside and just look at the exact system in the video at the end there even if the last part multiplies the rest it still looks like not a 2:1 but 1:1. I notice he has the end of the rope draped through the pipes on the tower which sparked me thinking if he pulled on that it would kinda make it a 2:1 (except it's not a pulley so adds friction so you're pulling against yourself as much as the rope based on the diameter of the bend and surface tension so uh i guess cancels out a significant amount of mechanical advantage) uhoh now I'm looking at the 5:1 part and yeah I know he has 4 pulleys but according to the rules isn't the last pulley not a pulley but a change of direction. well I feel pretty stupid now so if nothing else hopefully the time you took to read this comment is worthwhile entertainment. but if the 5:1 is actually a 4:1 and the 2:1 is actually a 1:1 wouldn't that just make it an 4:1 (or if multiplied 8:1) . I'm sure the entire rest of the video is 100% correct no doubt. I'm just personally trying to find errors in setting up a tarp for camping wrapping around a tree using a truckers hitch (which personally I think the friction on the bark of the tree counts as NO ADVANTAGE and the truckers hitch is literally the only pulley meaning it's a change of direction adding NO ADVANTAGE. haha this is hilarious subject to ponder thanks anyone who read this far and loveya clearly i have more thinking to do if i'm to understand pulleys. oh one last thing the next step as orignal comment reminded me, testing the lenth of rope pulled to the distance moved by the load if it really was 8 to 1 or 10 to 1 that'd suggest it's working to whatever extent. this is kind of importatn too cause thinking of example where you are pulling thousands of pounds in survival situations like winching a car one guy showed by doing a simple 2:1 (which I think consisted of nothing more than anchoring the line back on the winch or something) clearly showed one side of the load moving twice the distance of the other side supposedly putting to rest debate on the subject. I think I'll have to go start testing stuff personally to figure out where my confusion lies as I don't want to be a liability in a dangerous situation haha sorry for making anyone read my long comment but who knows maybe i did find innocent mistake or once i "figure it out" can explain easier to others
@@rho2888 You can run all pulley test really cheaply, without pulleys, but with steel O-rings, available at tool stores, real cheap. After documenting your test results, then, if you need to use it for lifting heavy stuff, you can advance to using marine-pulleys, and marine-ropes, because they are the most compact & the strongest!!!
Hello I work for a city in the northeast, I'm currently working to renovate a town hall clock. Was hoping I could email you with some questions on mechanical advantages.
T.I.A.
Show the calculation please.
Knowledge
What do you call that metal piece that looks like brass knuckles?
That is a Bearpaw style rigging plate.
The truss on the left's diagonals would be need to be fixed on a real setting.
Ugh!...beginning stagehands sometimes make this mistake too...always look for "V" shapes with the diagonal chords of stage truss
Finishing oak beams
I have locknlube couplings
I'm "Knot" sure I understand? 😆
Anchor? Hall team? Please define your terms. I don't know what you're saying. Also, you say "rule 1: if IT'S at the anchor, it's even, if IT'S tied off at the load it's odd." What is "IT"?!?
This is me, 7 months later, I'm going to attempt to answer my own questions.
Hall team is.... um, I still don't know.
Anchor is basically the end section of the rope, (no more pulleys) either it's tied off (anchored) at the top or bottom, or else your own hands take the place of a tied off point, so your hands are basically the anchor.
Lastly, "IT" is the rope.
Did I get two out of three?
Also, Rule #1 - if the Rope is tied off at the anchor. "IT" is the rope
Any one must understand
👍👏
Kemey ke slam do asmelash gebremariam ewe anne eye