3. Arches and Chains

How do arches work? Learn about that, and discover an intriguing relationship between arches and hanging chains. Check out our "Fun with Arches" video at • Fun with Arches . And don't forget to like our video!
To learn more and to see additional models, go to www.civil.uwaterloo.ca/brodlan...
You might also like our Beam Bending videos at • 01) Strain in a Beam
And our statistics videos at / @easystats8758

[@Vitrunis]

Nice, now I can go back playing Polybridge

[@AngelLestat2]

the best one was "bridge it", but now it is too old. I would love a modern complete game in which physics and engineering would be the main topic.

[@MassDynamic]

dude, i was thinking playing the same thing, lol

[@christofferrasmussen6533]

@@AngelLestat2 Oh, you mean like, idunno, Poly Bridge? *smh*

[@AngelLestat2]

@@christofferrasmussen6533 I repeat, the best one was "bridge it", search it on internet. You had a set of complex levels and free money levels in which you could set free your creativity, the graphics were really good for that time (because it was made in collaboration with nvidia). I made all kind of bridges or any kind of kinetic structures, from bridges that submerge under water when a ship pass or a huge wheel of fortune or any type of mechanic structure. The construction method and parts where also better than current bridge games. But as I said, I would have love a more general physics game, not just related to bridges.

[@Scubadog_]

@@AngelLestat2 I remember playing Phun and later Algodoo as a kid, but I imagine it's somewhat outdated as well. They also lack any goal or restrictions.

[@ditto7380]

The narrators voice perfectly spans the gap between interesting and relaxing.

[@Cheyruz]

For the longest time I wasn't sure if he was actually a text-to-speech programme

[@howtoliveonearthYT]

"spans the gap" lol

[@Elmistermarcus]

@@Cheyruz Is it???

[@GodsMistake]

If you play his voice backwards it perfectly fits the shape of a hanging chain.

[@andaroo.j]

The point about Gaudi's cathedral is incredible :O

[@iannoble8626]

First thing that came to my mind when I saw what the video was about. I was there a few years ago, and it was fascinating. (I've been telling/boring people about it ever since.)

[@fins59]

If ther's one work of art in the entire world I want to see, it's Gaudi's Cathederal.

[@skya6863]

@@fins59 good luck. It is quite mindblowing

[@bow-89]

@@iannoble8626 Well I haven't been in La Sagrada Família but yesterday I passed by the house where he was born. (I just needed to buy some rice and I had absolutely no intention to pass by, I just casually passed trough that street)

[@hoodio]

i was amazed about the model he made, so awesome

[@LitoGeorge]

The upside down chain model is mind blowing to me. Now I have a much better idea how to design my house. Thank you. Real world implications.

[@brertt8350]

Pretty sure arches are still kinda complicated if you plan on building it yourself

[@KingHalbatorix]

Brertt not for the level of load you would expect in his situation they aren't; at least asuming his house isn't a five story steel, brick and glass monstrosity. designing an arch that can bear a few thousand pounds is possible with nothing more than a rope and some rocks. People have been building arches using these techniques for more than a thousand years, sometimes without any maths involved at all. The romans never had any computer stress modeling or materials science to tell them how much load their substrates could bear, but the aqueducts are still standing today.

[@birtalanlorant5572]

KingHalbatorix Trial and error.

[@crunch9876]

Your designing your own house?

[@crunch9876]

KingHalbatorix yea. Except his house can be small and it doesn’t change the calculations much over a big 5 story building. City planning will ask for the same calculations

[@codetech5598]

Digital computer: construct mesh of finite elements and perform series of calculations to approximate behavior of system. Analog computer: hang a chain and add weights.

[@martiddy]

The simple methods are often the best solutions.

[@xcyted4now]

Why does that first part sound familiar? Avengers endgame?

[@MindcraftMax]

The thing is, nature perform many complex computations in our place, why not profit instead of recreating an inefficient, complicated and unprecise model?

[@BestHakase]

Chain with weights just abuses the computer that runs our simulation. It is always better than our hand-made artificial weak computers!

[@omermowaffaquejaigirder8889]

They constructed those complicated structures without computer

[@yuekang6098]

The few moments when KZbin recommendation algorithm actually works. I feel so lucky to have watched this video. Thank you for the amazing work!

[@user-he4if8ou4r]

Why am I watching this? But more importantly *Why am I enjoying this?*

[@NikitaSkryabin]

because it's pretty interesting material that can teach you something didn't know before? ¯\_(ツ)_/¯

[@TheCoffeehound]

Sometimes, you find something that fascinates you. If you pursue it, you might just find that it is your passion. Who knows, you might just become an engineer!

[@MegaBabyRawr]

Because you're an engineer my darling!

[@TheBehm08]

It’s somewhat interesting, the speakers voice is soothing, and you’re bored (guessing the last one)

[@frankiemanneman9946]

also why on earth did i choose this video in particular ?

[@mateomariscal5558]

This video deserves way more views

[@onjimana]

not really.

[@myeq]

You r right😊😊

[@myeq]

You r right😊😊

[@graytv-7345]

It does

[@troooooper100]

it's worth GOLD

[@ristopaasivirta9770]

Amazing visualization and explanation! Very impressed by the clarity and flow of information.

[@zabit2005]

As an civil engineer, I can say that this video was one of the most interesting and awesome one that I had watched for the last couple of years. I remembered the arches and cables were subject of one single unit in structural analysis book and we had learned they behaved just opposite. But, I did not remember so many fun fact about arches. This video was like a poem. 👍🏻👍🏻👍🏻👏🏻👏🏻👏🏻

[@martiddy]

I know almost nothing about architecture, but I genuinely enjoy this.

[@lewisheasman]

Pretty sure architecture is the design and the engineering makes it work

[@AyedYoutube]

Architects are those who gives engineers headaches 👊😎

[@lenap4956]

KZbin: "wanna know about chains?" Me: ....sure

[@anger_birb]

The KZbin algorithm gods determine our momentary obsessions now, it seems.

[@stooncol619]

Very underrated channel, differently deserves more views

[@AngelLestat2]

a channel needs time to obtain subscribers and views. This is a new channel, so if they keep doing videos they would receive the views they deserve.

[@wj11jam78]

No clue why this was suggested to me, but it was incredibly interesting, informative, and well explained. The parallel between arches and chains was NEVER something I would think of, but it's so perfect! I'll probably watch some more of these guy's videos after this.

[@mikumikuareka]

4:40 When I saw a side to side comparison I suddenly understood how the light bulb in the head feels like

[@artemstupin6668]

one of the most interesting videos of the whole KZbin! thanks to the authors of the video!

[@VRebuli]

I literally have a Master's degree in Structural Engineering, and though I have studied catenaries and arches, I had never heard of the chain test before. It simple, elegant, beautiful! Thank you for that!

[@Zapper1993]

It's fun seeing these models and being like "Yeah, that just feels right"

[@janka1298]

I'm just stunned by the fact that this information is totally free to public! as an engineer (I'm software engineer) I always try to find educating books/videos on how things work. thank you so much for your work!

[@jaykenarn6223]

Got introduced to these series because of my assignment regarding Gothic architecture. Glad I stayed

[@PiotrekPomorski]

I've recently been in Barcelona and visited La Sagrada Familia and La Casa Milla. I saw the exact chain model that Antoni Gaudi used. It's a remarkable piece of engineering and creativity from his side! I loved this video so much more because of this, keep it up!

[@dbayboyds409]

What a beautifully simple video. It takes a deep understanding to explain something so clearly. Thank you!

[@marcovillalobos5177]

I can barely describe the amount of joy I got from watching. Thank you so much ❤

[@louie99999]

I will never look at the world the same. Thank you!

[@Kaardoron]

Thank you! Very eye-opening. Sat here and kept saying 'Wow' to myself throughout the whole video :P

[@usermanico]

This is pure gold. Definitely needs to be on youtube frontpage

[@XepptizZ]

The chain test is now something I have committed to memory and will try to never forget.

[@frankligas2249]

Request: Great learning material. Schools run by local governments require replay of such material to have Creative Commons Attribution instructions sited in the video description or in the video itself. I request that you update your description of your videos and all future videos to make it easier for teachers to give you attribution, and legally use your videos in classrooms. Thanks for the video.

[@juanchetumare]

These videos are pure gold, and it shows that they were made with passion. Thanks for your work.

[@engineeringmodels]

Thank you! And, yes, they were done with passion, much of that deriving from the wonderful students I taught over the years.

[@ElaijahModarro]

Absolutely amazing and clear demonstration, this is a masterclass on how to get the point across the most illuminating way possible, a lesson for every teacher.

[@rumiazhari7387]

This video definitely deserves more views.

[@Jared-vq4zy]

The fact that there were people hundreds or even thousands of years ago who knew about this principle and used it in building is mind blowing to me. I wonder how much practical knowledge we could obtain just by looking at the past, and seeing how our ancestors solved problems.

Thank you for recommending this video to me, youtube algorithm.

[@renzo00]

Woah, uamee! Hey there!

[@sallybradshaw4576]

I always loved going under the Natchez Trace bridge on the way to Nashville! Thanks for bringing up a delightful memory!

[@AbhijeetKumarThakur1729]

This channel should have atleast a million subscribers.

[@EdwardKilner]

Always nice to see my university funding videos of this high quality.

[@mvmlego1212]

That was some REALLY old-school presentation style. I'm not complaining, though. It makes me a little nostalgic, and the video was very informative.

[@snupmadra3787]

That's a once in 5 year video that blows your mind with how interesting it is!

[@rorystockley5969]

I get the feeling that all mysteries can be solved through hanging chains.

[@wurlmon5191]

And all the problems one has can be solved with a hanging rope.

[@IIStaffyII]

Maybe string theory should swap for chain theory and it would be solved in no time? Who know certainly not me I don't know shit about quantum mechanics.

[@IIStaffyII]

@@wurlmon5191 Ooh that's dark.

[@danwdllg8221]

@@wurlmon5191 Im laughing way more than i should at this xD

[@ranfonaforanafo1601]

@@wurlmon5191 that escalated way too quick

[@ashleypenn7845]

Perfect for our homeschool unit on the architecture of ancient Rome! Thanks so much!

[@edtsch]

That was awesome! Well done, fun to watch and informative.

[@simitrajwadi9763]

I think this series is incredible and much needed. I had trouble understanding many of these concepts in architecture school, we could have used videos like these. Keep up the amazing work.

[@jabelsjabels]

whoa that upside down chain to right-side up arch is super cool! And that model for the basilica is beautiful, I really want to see that in person now

[@chandlersupple3553]

That was way more interesting than I thought it would be!

[@nhh49]

That's the basics?? Great video, very well explained.

[@annoykumarghosh7463]

I am a civil engineer and found it Beautiful...in other word awesome....totally loved it... Thanks very much

[@Dial8Transmition]

It never ceases to amaze how brilliant and smart some humans are

[@mickyr171]

I love when youtube recommends something interesting, get sick of hearing about what celebrity did what this week lol

[@jakubkowalczyk3310]

I am glad for the algorithm for bringing me here.

[@KevinMarquette]

That relationship to arches and chains was completely new to me. I love the way you presented the information and I learned quite a bit from this. Thank you

[@valshaped]

For my intro Calculus class, I *almost* did a project on catenary arches, but, for that level, we hadn't learned all of the necessary things. I got totally blown away by integration, and ended up changing my project to something convoluted.

[@hsienjungtsai3048]

the channel is so informative and well made, also thanks the youtube recommendations brought me here

[@funny-video-YouTube-channel]

Free Arch Building Lesson :-) Internet is perfect for free education :-)

[@ymc3168]

Hope you can make another video about pointed arches used in the Gothic cathedrals.

[@aneeshgupta2968]

YM C they have! It’s no. 5 in their playlist

[@ymc3168]

@@aneeshgupta2968 Yes, I've watched that video. It introduces buttresses and flying buttresses, but not pointed arches. But thank you all the same.

[@abdullaht.3607]

Really awesome channel that shows what we have studied in textbooks. Big thanks to all who worked on these videos

[@olegustymchuk8106]

It's just me or recommendations are gets better? great series btw, looking forward to watch all of it

[@AliHSyed]

Such an elegant description... Thanks for the great lecture and the visual aids.

[@theprophetez1357]

Thanks for the chain demo, and making this so easy to understand.

[@troooooper100]

I'm honored having come across this

[@KashifKhan-cn3nk]

Didn’t learn so much in 3 years of my architecture. 👏🏻👏🏻👏🏻

[@jdillon3035]

Never too late to learn something new. Thanks!

[@rhishijoshi]

This is a great explanation of how arches work... Thank you!

[@quiksilveriz]

I used to take World Civilizations back in College and my professor briefly mentioned how the Romans were so proud about using them but he never explained why (or maybe he did but I wasn't paying attention). But I knew it was significant because during those times, much of their architecture was designed with arches. So I'm glad I found this video on KZbin and thank you for explaining it in a easy-to-understand way!

[@Ndoda71]

Wow this is so informative it should be recommended to every person on KZbin because I think even people who are not interested in engineering can enjoy and understand these.

[@education.online_frevryone]

Just subscribed. Love the way how the channel builds the models to explain the concepts!

[@dtstar331]

Actually, a catenary is more similar to a graph of hyperbolic cosine than a parabola In fact, cosh may actually be describing the catenary if I remember correctly

[@shift4156]

absolutely

[@planterion7969]

Yes, a parabola is a very rough approximation, I think the hyperbolic cosine is actually exactly the chain shape

[@quintonashley5745]

High quality 4k video! Great job!

[@Winner632]

I did not realize how similar yet remarkably different arches and chains were. This is an incredible video, and it is very well made.

[@jacquesoquinn7790]

A friend and I are making a cob roundhouse and this knowledge will be very useful to us! great video.

[@jambodjembe]

Half a century and I am still finding basic things I new nothing about. This is an excellent video: Very clear and easy to follow. Many thanks.

[@pwhnckexstflajizdryvombqug9042]

I like these videos because they are about the practical nature rather than a bunch of maths.

[@denizucer578]

Thanks for sharing for free. Well explained and illustrated.

[@iacsse6381]

Thank you sir, for both teaching by using the common vocabulary words and simply explain the important point.

[@EvoKeremidarov]

First time I come across this channel and I am really glad I did.. I've learned so much from this video and the video it self was made so well with great examples and no unnecessary time wasting ... thank you

[@smallweinersteve8808]

im so happy i found this gem, was doing research for my upcoming presentation on the basics of bridge building, thanks alot

[@patriciovente7049]

Something of so complex application and use, explained in a so simple and understandable way. Absolutely fantastic!!!! Greetings from Paraguay!

[@JettyBuilder]

I had a great education in Civil Engineering at Heriot Watt University but I can tell you that I Learned a lot via the models used in your videos. It seems so clear using chains but I never heard of that analogy before. What you are showing is that as soon as the arch blocks see eccentric loading then the joints try to go into tension and rapidly fail.

[@nz1229]

Great channel - thank you for the very practical engineering concepts!

[@theghostmachine]

I'm so happy I found this video, and even more delighted that this was made in Waterloo.

[@MolotovWithLux]

Great description of weights working as tension systems

[@theoroosevelt4849]

for some odd reason this was recomended to me, and for some odd reason i clicked on the video, and for some odd reason i watched the whole thing, and for some odd reason i really enjoyed it. Good vid!

[@dv729]

Beautifully explained !!

[@chriswelcome8102]

I did not expect to learn something today, especially about bridges, arches and chains, but this was nice

[@sakoupa]

Priceless video !!! THANK YOU !

[@augustinglenn]

Wow! Very informative. The practical demonstration made it even easier to understand

[@Bloomio95]

Excellent and thorough explanation! Thank you very much

[@maclo97]

Amazing use of visual aid! Excellent video.

[@Vinkie]

Amazingly clear and informative video. Thanks for sharing!

[@berkayefe7612]

You made my day. You deserve respect.

[@tarunce995]

Best explanation ever .!!! Thank you for this great insightful video !!!

[@aeropyro1610]

one of the best videos i watched this week!

[@TitanFrost]

Really easy to understand, thank you for the vid. I never new I wanted to know this much about arches, chains, and bridges. Fascinating!

[@taufanali3170]

Amazingly concise and comprehensive videos props to you guys

[@stuartdoyle99]

I was interested to find out about how ancient arches were created and I’m really glad I came across this! Thank you!

[@mahxylim7983]

A fantastic new point of view! Brilliant explanation!

[@Weincraft]

Anything explained well is a treat! Thanks.

[@davi.alexandre]

Impressive video. Absolutely love it

[@rhejamphi]

This was incredibly good. More of this.

[@khayreddinekhayro7108]

Amazing video , deserves a lot more love

[@nguyenangtuandung2745]

my brother is a civil engineer and he talked about these effects all the time and now I finally had a chance to give him back some of my knowledge on my own

[@cognitor900]

As an aficionado of any Roman arch I’ve always been curious as to whether there ever could be a fast and simple gauge of any planned arch’s holding capacities..... AND THE CHAIN TEST IS THE WINNER!!! I don’t suppose that anyone knows where and when the chain test was “discovered”? Thanks again and please keep publishing this terrific series with any new material.