Three Pin Lewis Demonstration
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- Опубликовано: 20 сен 2024
- A three pin lewis, also known as a dovetailed lewis, St Peter's keys, or a Wilson bolt fits into a dovetailed seating in the top of a building stone. It is made from three pieces of rectangular-section steel held together with a shackle, allowing connection to a lifting hook. The middle leg is square throughout its length, while the outer legs are thinner at the top, flaring towards the bottom. Held together, the three legs thus form a dovetail shape.
They are now illegal in the UK but were still in use when I started my career.
No idea why youtube showed me this video, but I watched it regardless. I do no feel my time has been wasted.
Not or now?
@@billrosenstein bit of both.
You, too, huh? This was out of the blue for me.
Really don't care about the feelings of the creator at all work a callous comment like that. I really liked this video and found it informative
@@davidpile2576 that's a bit skitzo .
please for the love of all, keep making videos showing how we used to do things so this knowledge is not lost.
There's a LOT of those type of things....in books
@@sunsetpark_fpvbooks are boring
I still do these things 😂😂😂
But I use a drill 😉
Thats the goal of freemasons i believe
I call Three Pin Lewis And the Stonemasons as my new band name.
Nice....
All your admirers will want to see your centre pin… just be careful what you let them pass through the eye
Not bad
Three-Pin Lewis "The Stone" Mason is my wrestling name.
Sounds very prog-rock 🎸
He picked up the three pin Lewis, the most difficult spare in all of bowling!!!
Lewis Lebowski
Top comment!! 😊
Illegal you say?! “Pulls out my 4 pin Geoffrey” the police run away screaming
I was waiting for him to be arrested at the end. Very disappointing.
Mason when arrested: "It's a fair cop."
I was waiting for the part where the dinosaur signalled it was the end of the working day and he went home in his open bottomed car .
"What are you in for?"
"Murder. You?"
"I used a three-pin lewis."
And they all moved away from me on the bench.
The UK will arrest people for memes so this is nothing
It's illegal to use because it's not that safe.
A MASTER, as this guy probably was, knows what he's doing.
But someone less skilled only has to cut the hole slightly wrong and it will fall out. or if the stone is bad, the force wil fracture it, and it will fall out.
You need something that works, even if the guy doing it is clueless.
And when you're lifting multi ton stones, yeah, you wanna get it right.
I have worked with old stone masons who didn’t have power tools, and I have helped them to build a couple of private mausoleums. They were 8” thick granite walls 8’x10’ they called that device a German key. The Lewis pins we use are single angled apposing holes. Sometimes as many as three mostly two. And the type of steel they are made of now makes them very expensive but they work great,because you can’t use straps when setting walls. And also the pinned stone clamp works too and cheaper.
Absolutely no clue how this appeared in my feed, but after a riveting two minutes twenty I declare a three thumbs up.
We have these holes in the 1891 stone and brick mansion we are restoring. We don't trust the old holes so we have just been using cargo straps. Every once in a while one of our viewers will mention these Lewis pins.
Don't trust them holes! 😂
"What are you in for?"
"Murdered my family. You?"
"I used a three-pin lewis."
And they all moved away from me on the bench.
Nice reference
Litterbuggin
The Group W bench!
Ha, ha, ha, that is a funny response thumbs up!
🤭
Thank you for recording an posting this valuable educational video.
The entire time I've been getting it wrong. I was using a two pin lewis. Now maybe I can make some progress on my stone moving.
The Stomasons’ Guild of St. Stephen and St. George’s. What a title, absolutely wonderful.
at age 71, having spent years in construction, mostly in everything EXCEPT stonework, and as a speculative Mason, I thoroughly enjoyed watching this video, new sub, but I seriously doubt I will EVER have occasion to use this on any stone whatsoever. That said, I can see this technique being very useful when similar constraints are applied to the lifting and placement of non-stone materials. Thank you.
They allow a stone to be positioned or fitted into a slot where other lifting systems would get in the way. The quality of the stone is important as the device puts the block in tension (splitting). My opinion, for what it's worth, is from basic mechanical engineering and dry stone wall building experience.
thanks. I was about to ask "why is this a thing when we have ropes?"
@@zachweyrauch2988- Ropes would be difficult to remove once the stone was in place if you had it sitting on them. You could use either nubs or pins driven into the sides of the stone to lift with ropes rather than having the rope lift from under the stone.
Don't know why, don't know how but here I am amazed and delighted again by human skill and ingenuity.
Hello, Dr., I watched this video that was randomly offered by RUclips, which rarely got is useful out entertaining and EDUCATIONAL, but this is. I subscribed and I hope to see more.
It's always a pleasure to watch an Operative Mason at his craft!!! 🤠👍
An Operative Mason you say? Whence came ye?
@@diogeneslantern18 From the West, I bet.
Using those round hammers is a trick! Lots of practice to do that effectively
@@diogeneslantern18From a Lodge of the Holy Saints John.
Stephenville #267 and Clairette #1052 AF&AM. 😁
@@CristiNeaguThe East.
PM.
No wonder it took a thousand years to finish cathedrals...
Interesting but there’s plenty of stuff we don’t do now that we used to. Safety rules are written in blood.
Actually.....safety rules are written in money by lawyers and insurance underwriters. Nobody in power cares about anyones life or safety. Never have, never will.
I always wondered...Thanks for a great video, impressive demonstration with a clear narration. Well done, Sir, well done indeed.
Do you cut a keystone shape in the stone, with the bottom wider? The 3 pieces fit too loosely to think otherwise, not that it needs to be a tight fit in either dimension.
@ljprep6250 yes you start squarely and then go wider
I love learning the "Old Ways" as the ingenuity of simple tools built way more things than the modern equivalents. There's a time and place for everything.
This method was banned because the pins pull out and workers have died from the falling stone. So much for the old ways.
It's a neat little device, but saying it built more than modern cranes is just nonsense.
@@andrewhooper7603well, really the old devices built much more impressive and far more beautiful and character full buildings such as cathedrals
@@CastleHassall you my friend, has never seen sagrada familia church
@@CastleHassall subjective
This is great! I've learned more in the comments than I expected 👍
Used one in the ceiling of a bath stone quarry to lower crane parts years ago.
I had no idea what a Three Pin Lewis was and now I know. Very interesting demo. Learn something new daily.
Thank you for your effort and time
Second time seeing this and still love it. Thanks
People always tell me the cylindrical hammers are better until I try using one in front of them 😅
Brings back memories. I worked off the side of the Manchester ship canal. The Queen Elizabeth II Dock repaired chipped que sides but of Granite. Splitting pin and feathers saved time to but as for that split lifting eyed hook, that was cutting edge. Ours had only two partseparate, the hole was 30 mm and straight it was only the weight of the granite kept the pin from slipping and sometimes an inch or less.
Fantastic, learnt something new today. Thank you!
Very cool, thanks!
Very cool thank you for sharing that is a lot of work for one stone
Yeah it should be illegal for being a gd waste of time
@@LT1 I don't know anything about being a stone Mason so I would not know if this is a waste of time
@@LT1 Why is it a waste of time?
@@wolfie498because you have to chisel out a deep hole. You could use a claw grip or straps to lift it much faster than prepping this tool.
@@TheBeefSlayer not straps, that's the point. Claw grips if they're strong enough though, sounds a reasonable alternative.
Absolutely brilliant!
These videos are great. Masonry and geo fan from the USA
ingenious and i use the same principle lifting and dragging heavy things with my tractor. sort of a tension clamp or something. jam something in and then lift a bit to cause it to expand and Robert's your mothers brother.
BRILLENT !!! I love it.......simple.....and it works.
Fantastic chisels. They must be very hard and yet not brittle.
That's what she said...
Not in many years. 😢
Interesting demonstration! (new subscriber, stone-carver, Virginia)
I have used Lewis pins in Canada, during a restoration. Sadly, they aren't up to standards, anymore. Nice video, great craftsmanship.
Oi mate! Ya got a loicense for that there dangerous lewis??
Absolutely fascinating, thank you very much.
Quite meditative as well as informative ;)
Learned something. Safe for smaller blocks, with care, clean stone, surely.
A very good traditional technique.
Unfortunately, I had to realize during the restoration that the weaker the sandstone, the more susceptible it is. Microcracks form and over time the stone cracks in two.
Good work brother!
Get in there Lewis!
Thank you sir. 😎👍
Thanks.
The pin in the shackle is called a forelock 😊
A simple but great and illagal technique. 😊
I use this account for ASMR and for popping.
No idea why the RUclips algo felt this was something i might like but here i am nonetheless...
Brilliant!
SO SIMPLE... EXCELLENT VIDEO, STAY SAFE
What!!! No alien rock melting tech.
Sorry
You are just being naughty. You know that they did it with multi-harmonic sound waves. 🔊
is there a particular reason they are illegal now?
My guess is safty reasons.. 🤷🏻♂️
It's held only by preasure.
@@SmokinnnnThat's my guess as well. It's too easy for a novice to carve the slot improperly, and the key to slip out while the block is in midair. It's also not guaranteed that a hidden flaw in the stone won't cause it to split while in midair and there is a ton of pressure on that wedge.
@@Scarabswarm
Exactly mate. Sounds logic to me.
✌🏽🍻
Love the skill.
Choose your material wisely. Trust your material.
I work stones I find on the ground with a rotary tool and diamond bits and one thing I've learned is it takes a long time to work through a piece of stone. Could be I have cheap bits, or I sometimes hit a really hard part that won't even cut. Most of the stone here is lime, so it's easy enough to work with.
Great little video!
The Freemasons hate him for revealing the secrets.
Explains how they hoisted blocks into place
Wow every cathedrals stone was hoisted in that manner that high WOW
i wonder if this method was not to be used for stones exposed on the upper side of buildings as rainwater pooling and freezing in the slot (if turned upwards) could have prematurely weathered and split the stone
It's UK, I will bet it's either something to do with H&S or someone was offended...
@@tomekciepiaszuk582 What on Earth are you talking about? The question was about whether this method would have been used _in the past_ for stones on upper surfaces.
@@beeble2003 Ah yes, clearly I didn't pay enough attention, ignore me.
@@tomekciepiaszuk582 Fair enough. :)
The holes would be in the mortar joints between courses. Capstones would be lifted wrapped with rope or inverted
Pretty cool, though I can see why it is illegal, someone that did not know how to make it right could kill someone lifting it
How? Someone lifting it would not be so stupid as to walk under it. Would they?
Yeah I work with a couple of morons that are a little high and do stupid stuff like that. I work at a small stone quarry and have seen them walk under parts of the crusher as we had to replace some of it.
@@jeffharper7579do they not put a barrier up to alert people of the overhead danger?
@@paulfrost8952 if you have a controlled number of people on site (ie staff and not public) then information rather than barriers is standard practice for lifts.
Barriers can be impractical and people still walk through them.
@@pobvic if the barrier can be walked through it’s not a barrier!
That s the same idea granite quarries use to pick up massive blocks of stone that weigh many tons. Of course it’s much larger than this. And the hole is drilled in with a jackhammer.
Ingenious idea
must have taken quite some time to chip away that deep slot
Im amazed at the grand architecture we had centuries ago. They built awe inspiring structures that are still standing. Our current way of building is garbage in comparison
Sometimes RUclips recommendation is just like shower thought, no idea why I consume this video
Great to see the video pop up in my feed! Why are they illegal now?
Pins would/could get loose, fallen rocks killed a lot of workers, eventually leading to ban.
I wonder who's job it would have been to cut these sockets, my first thought was it would have been an apprentice's job, to teach them to cut accurately, but then thinking of what all could go wrong and how costly it would be if not done right if it would have been the 'old guy' who had put his time in up top and was on what would have been considered light work?
I think I spend more time thinking about ancient stone masonry than the roman empire.
Very interesting, thanks!😊
I was just wondering how to do this
Wouldn't it be easier and faster to just carry the stone at the edges?
At first I thought "Three Pin Lewis" was a British version of "Three Card Monty."
Out of a million people.....maybe three or four could do that..!!
recently retired stonemason lovely to show how cathedrals were built before health and safety created a business that didnt need creating.
What’s the largest size block you would lift with this? Would you ever use more than one in a single block?
I don’t know exactly but I have seen very large Lewises
I can definitely see why its banned for use. probably wasn't uncommon that a stone could split and fall
How long did cutting the slot take, in real time, and why didn't the stone split in two when chiselling out the slot, please? Isn't a hammer and chisel what you could use to split the stone?
So you have to pick the rock up and clean it out upside down several times, just to pick it up with a chain?..............
very cool
Why do you suppose it's illegal?
Rock and stone lads
Fascinating. But why is it illegal? Scrolling through the comments now to see if it's already been answered.
Pins would/could get loose, fallen rocks killed a lot of workers, eventually leading to a ban.
Why is this illegal now, were the stonebenders of the time too formidable?
I dont understand how he locked the grab bar in place 🤔🤔🤔
There is a bolt that goes through the shackles and all the three pins
Thank you, so why are they banned, health &safety say no they dont find it 100% safe. Would like to know.😊
Does your belt have a clock on it? If so that is both useful and cool looking.
Oh come on there's no way that stone could be lifted without advanced alien technology.
I clicked on this video thinking that block was some type of cheese.
Super cool video
I liked it.
Why are they illegal?
Sooooo what do you use for filling the hole that you made?
They are usually in the joint so the mortar will fill them and they act as a key.
Apart from this time consuming method there is a way simpler one. (Not to mention that this method has the potential to split the stone.)
Almost all of the stones in gothic cathedrals have 2 or 4 small holes on both sides and they were hoisted up with a simple claw very similar to 20th century ice block claws. The larger the weight of the stones, the tighter the claw grips compressing it.
The first I learned of this was observing Segovia aqueduct back in 1996, and noticing all those holes and surmising they might have been for lifting. I had to look them up later. No internet for me then.
First time I've seen a stonemason wearing a tie at work!
that would depend on your clients.
I feel like I'm about to be served a 60 degree ale, not a rock.
Illegal? I’m not sure I understand? Like on a commercial site you mean? Or like……..ANYWHERE?
I always thought they levitated the stones with alien technology.
That's plan b in case the requirements of the project render the lewis method impossible.
They did. This whole video is part of an elaborate ruse, thousands of years old, to deceive the public and conceal the truth about the aliens.
Nah, on those cathedrals, just the power of prayer, nothing sci-fi about it. Although concentrating hard enough on holy thoughts wasn't easy after nine pints of Mistress Hathaway's Devilgriper Ale the night before.
Awesome! Now build a full-scale pyramid. Thanks!
Is this meant to be funny?