The Beautiful Engineering behind the Arch Bridges!

[@SabinCivil]

I hope you enjoyed the Arch bridge video. Lesics is currently fighting for survival - www.patreon.com/Lesics . Your support matters a lot to me and my team. You will also get access to exclusive engineering videos. Thanks Sabin

[@James-kv6kb]

It's getting ridiculous with the Americans taking over all of the videos we can't even hear about the Sydney Harbour bridge without hearing a Yank who can't pronounce words correctly . And of course you make the video last as long as possible so KZbin will give you money. getting sick to death of hearing your accent I really am. You may love the sound of your own voice but we don't

[@RoKuSa007]

I like how Vande Bharat Express is running over Chenab Bridge 😅 hope to see that soon 🤞🏼🤓

[@f4life-l3v]

Vande Bharat is lighter train

[@ProfFeinman]

I don’t understand. A parabola is not a catenary. I know they are close but a horse is not a cow. Isn’t this unscientific?

[@SabinCivil]

@@ProfFeinman We have mentioned this fact, I hope you missed it 03:50

[@apratimbiswas1804]

@@SabinCivil Please make a video on Howrah Bridge(Rabindra Setu) ; Kolkata ; India

[@aryavijay410]

@@SabinCivil 08:50

[@ethanebang8902]

I love the circular vs parabolic demonstration yall did at 1:32 it made it really puts to perspective what a shape change would do keep up the good work

[@janami-dharmam]

the curve is actually called a catenary, parabola is an approximation.

[@Dragon-Slay3r]

@@janami-dharmam aka narrow block

[@Jack_Callcott_AU]

​@@janami-dharmam I have been taught in my mathematics classes that the curve is a catenary. When you say "parabola is an approximation" do you mean that engineers make that approximation out of need for convenience, or do you mean that mathematically there is a similarity between the two curves❔

[@nc3826]

@Jack_Callcott_AU, A catenary shaped hanging chain is just a real world illustration for principles that are still applicable to an arched bridge with a parabolic shape. And since the shapes are slightly different, so will the mathematical functions that model them.

[@manfredmatschke1278]

​@@Dragon-Slay3rxx❤

[@sombrachunga]

Some of us would appreciate greatly if conversions to SI were included. 7 inches? 160 feet? I had to Google it and it is quite a pain in the arse. Anyway, great video as always.

[@Jayesk]

times it by three and add your favorite number divided by two for metres :)

[@ZNotFound]

@@Jayesk "add your favorite number"?

[@MrFilmerHD]

Suggestion @Lesics, can you put also metric system in your videos. That's easier for the 90% of the world population to understand :) Thanks

[@rockeygarcia5865]

You're very right 👍

[@SabinCivil]

Yah, we also have moved to metric units :)

[@sumitchavan1671]

A video covering the chenab bridge, India would be highly appreciated. Great work!

[@nickmueller7850]

i went to school near this bridge and you answered a lot of questions i have had for twenty years. Thank you!

[@AlexDominus]

Can you also add metric measurements in the next video? Thank you for your work

[@johnfowler4820]

The harbour bridge was built by Dorman Long - Middlesbrough UK. My 98 year old Grandfather became the head engineer for this firm and worked with the engineers of the harbour bridge in the fourties and fifties.

[@RD-ox3ce]

It’s a brilliant bit of Engineering Construction 🇬🇧

[@gery4870]

The International System of Units uses metric. So I think you should add METRIC units on your phyisics and engineering videos to be even more pro. BTW superb video, LOVE IT !

[@greatking1327]

A video covering the Howrah Bridge of West Bengal, India would be highly appreciated. A bridge that stood the test of time! Great work!

[@cwardo9810]

I love how this channel gets so into depth!!

[@justaguy4real]

This is awesome. And just like at 6:20 it's amazing what is learned over time when population and technology expands.

[@deveshsen1141]

Honestly, Your channel makes structural engineering more & more interesting I can't stop myself to continously watching your knowledgable videos.

[@allangibson8494]

The harbour bridge isn’t a parabola - it’s a catenary curve inverted (a hyperbolic curve). A parabola and hyperbola are significantly different.

[@markoj3512]

Yep normally I use a cosh function this, this video is full of wrong information

[@jdwelman5849]

Jip! Cables hang in a hyperbolic curve.

[@OneTpotFan1]

​@@markoj3512nahh bro thins everything is wrong💀💀💀😎😎

[@DrJQureshi]

You made it so easy for lay audience to understand something so technical. Excellent work, keep it up.

[@titanium1983]

i have a microbiology tomorrow and here I am learning about bridges!! , nice !

[@AaronHahnStudios]

This is why Lesics is a FEATURE Channel on my KZbin channel. Great art work Lesics, more of this. 👍

[@MARCUS-g9j]

Wow what a satisfactory and most brilliant construction, I am more than happy with your detailed presentation.. Thank you

[@yewenyi]

The Sydney harbour bridge didn’t have 4 railway tracks. It had two railway and two tram tracks. When they shut down the tram system they converted the tram tracks to extra lanes.

[@pwhnckexstflajizdryvombqug9042]

Yes but they did put locomotives on them and as per the original plans they had always intended for the tram tracks to be turned into railway tracks when the demand was there, that just didn't happen because by 1958 cars were "king"

[@shankarv1396]

were replaced by roadways as per video.

[@xaviersantamaria8618]

Amazing video, thank you. Please tell why a parabolic shape is used instead of a catenary?

[@Rahul_Ahlawat]

3:50

[@srinivasanv6573]

Such a awesome explanation ❤ big salute for your huge effort....

[@BimDaTitanicNerd]

This is really interesting

[@hecticunit]

For anyone that doesn't live in Australia, it's just the sydney harbour bridge.

[@gnuthad]

And it doesn't have 4 train lines; there's only 2.

[@jackchapo2011]

​@Gnuthad It was made clear that two train line were converted to road in 1958.

[@gnuthad]

@@jackchapo2011 I seem to have missed that. Can you provide the time code so I can go back and listen again?

[@Welv1987]

Those videos are very satisfying to watch. Very well explained. Nice work, good job

[@shamanjitsingh7267]

I, as a man, feel proud. Yes, we built this world and I am proud of it.

[@alext8828]

It would be fascinating to see the hinges marked off in degrees or another way so that the keen observer could appreciate the science involved.

[@pwhnckexstflajizdryvombqug9042]

It doesn't change by much, if the top is only 7 inches different across the year, I can imagine that those hinges move by less than a single degree.

[@janami-dharmam]

I do not think you can make out visually.

[@Franklinwin]

I like the way you give details about things. Thank you Lesics

[@Dark_Matter2]

Masterpiece of engineering

[@Dark_Matter2]

@Steve Robinson why not

[@soundzoneofficial3708]

I am from India 🇮🇳 bro. I watch your videos, your videos are very knowledgeable. Love you BROTHER ❣️👍😊

[@kunjukunjunil1481]

Lol he is also from India 😆are you new here?

[@akashdas3313]

I don't know why I can't help but love your videos...

[@klmkt4339]

The effort you put in explaining the science is as meticulous as the real construction itself. I was stunned and forgot to sit straight

[@lijojosef]

Such lucid and simple explanation for complex engineering marvels! Amazing works, Mr. Sabin🎉!

[@dennisphilip7596]

FANTASTIC VIDEO , YOU MAKE EVERY WITH DETAILED ANALYSIS AND MAKES EVERYONE UNDERSTAND THE ENGG. CONCEPTS IN SIMPLE WAY

[@onlineskillsbyimranbilal]

one of the best construction animated video ever seen

[@Persistent24]

I'm not a engineer student but I learn something new from your video. Thanks SIR💙

[@joshuaallinson6122]

i remember watching the build of this in school and one of the things i found most interesting is they learnt what the benz was from digging in the pillars

[@flamingfrancis]

The Bends or Caissons Disease is what was experienced by workers when digging out the piers for the Brooklyn Bridge in NYC. Those piers are more than 40 feet below the water and the pressure created the bends conditon.

[@natividadlilio8960]

This is why, the strength of materials is very important to learn.

[@JonathanFisherS]

catenary curves and parabolas have slightly different equations, and it's catenary that are the primary curves used in self supporting structures ;) They're very similar in shape and _sometimes_ are interchangeable, but they are two different things.

[@handhikaramadhan]

I had a confusion at the beginning when you said the parabolic arc was the strongest structure, precisely because it should be catenary. Thanks for clearing it up.

[@hocuspocustadaa4671]

I'm happy that I'm watching this great animated explanation Thankyou!

[@andrevale8610]

Awesome video. Explains much better than some teachers

[@mihirchandran]

You can also describe the arch as hyperbolic, sinusoidal, or cosinusoidal.

[@rehany3401]

ok mihir chandran

[@janami-dharmam]

and all of them will be wrong; the real shape is catenary en.wikipedia.org/wiki/Catenary

[@winnipegtroll01]

Awesome! Goes nicely with discussion of parabolic shapes in RealEngineering channel's video on the Sagrada Familia.

[@Bemath_kh]

If I had watch this channel when I was younger. I would have definitely studied architecture at the university.

[@fireworkormosu]

This is gonna help me in poly bridge 2

[@ltdgamer7705]

Tnx Bez of this video I have great talk with my dad about engineering

[@johnnysins1781]

This man never disappoint us

[@saurabhsrivastav6502]

I love the quality and effort to put the every Detailing in the video love you never end this. You are awesome. Very very very very very much love and respect for you and your team.

[@ronymanuel507]

USA built the America’s bridge over the south entrance of the Panama Canal…… It is beautiful and huge! They used the parabolic design. Regards from Panama 🇵🇦!!!

[@thesonofkastakar]

Beautifully Explained Thanks for sharing such informative videos, Kudos To Your Work ✨💥

[@cyankirkpatrick5194]

🤯 Amazing, simply amazing, I doubt that this would ever be made in the USA because of it's design and safety, and money.

[@joseph221092]

Fun fact, the chief engineer of the Sydney Harbour Bridge was inspired by New York's Hell Gate Bridge.

[@aayishasparrow5548]

Wonderful Presentation. ❤

[@lesserfield_]

Man, this channel taught me a lot

[@paolomargini7904]

It should be mentioned that the brick and stone towers at both ends have no role in the structure of the bridge but are there just and only for psychological reassurance towards the many drivers who may fear that slim steel beams are less solid than massive stone buildings.

[@pitriyanti549]

sambil minum kopi pagi nonton tayangan yg berdaging emang asiikk....mksh ya atas kontennya...bermanfaat banget

[@sheerazqureshi5052]

Omg what an explanation!!!!😍♥️

[@peaceloving1626]

One of the best videos on Engineering 👍👍👍👍

[@edisercer]

rce has to watch this

[@GedMaybury23]

Thx. I learned several new things (I took several years of Structures at Uni level/Architecture). As to the SHB, I've been over it a few dozen times - -but still knew very little about the process, or thought behind it. Special mention: your video is well-pitched to noobs (excuse the expression, but it so fits!) - and I really liked that you put questions to the viewer. Engaging the viewer keeps attention and empowers. All most excellent. Fab CGI, too!

[@Cartidise]

Salute to the Lesics team for constructing the entire bridge again just for us 😊😊

[@1945CCCP]

The best supporting profile is the so-called "chain line" (based on ch(x) function). See textbooks for further learning .

[@brianbourke8859]

Sydney harbur bridge was "Load testing the Sydney Harbour Bridge - Feb 1932" using 96 Steam locomotives

[@dylanmcgreevy7447]

It's a good test really and pays homage. The builders of this bridge were from the north east of England. They built the Tyne bridge too in Newcastle upon Tyne, England. Coincidentally it was also where the first steam locomotives we're invented and train tracks. So it makes sense historically that they test the load with trains.

[@groovejet77]

Geordies and men from the north east of England built this bridge when we were great.

[@aland.9060]

Keep making these videos they are awesome

[@maherkhalil7637]

Very good video! 😁

[@mathangles3355]

Explained in a perfect way.👍👍

[@mehulchandegra6551]

I like your references of Indian technologies

[@rustycherkas8229]

Just in time for this year's world famous Sydney New Year's Eve fireworks display! 🎇🎆

[@JPJ432]

A Little Fun Fact: the original plan for the Panama Canal was to make it a “Sea Level Canal”. This was proved to be feasible. It would have been further East of Panama and would have included Present day Colombian territory. The 2 reasons as to why they did not make it so was not because of Colombia but they saw no Money and Power/Control by making it a Sea Level Canal so they went with the Locks instead.

[@ajieshaputro2550]

woww... this is very cool, the explanation in the video is very clear

[@ritzviews4113]

Please give a lesson on the building of multistoried castles and palaces in mediaeval period.

[@tamimrahman9514]

Nice. I love engineering.

[@iiSnely]

I learned civil engineering in 9:59 👏🏻

[@IanCaponeDrVonoreheimdonzYT]

I like both below and above deck arch bridges

[@3mileshi]

Yes, clearly they are best

[@dineshamgoth12k]

hey Lesics please, I request you please make a video on the Chenab bridge. Please

[@gezzapk]

It would be good to have the metric system used also being Australia use this system

[@flamingfrancis]

At the time the Bridge was constructed the system used in Australia was the British Imperial one.The engineering was largely British as was the steel used

[@JordonRogers-i6d]

That's amazing

[@greathornedowl1783]

this was an extremely advanced and impressive feat for Australia back in 1932. Australia has always been a bit behind the rest of the developed world(not anymore) so its amazing that we pulled this off so early.

[@nbmufc94]

This is right up my street. Thanks

[@tristaneustaquio2427]

Impressive engineering, I hope you make a video about the CCLEX or the Cebu-Cordova Link Expressway here in the Philippines. Want to watch it sooner ❤

[@Nightscape_]

Great to see high quality videos again after that PCB marketing advertisement you tricked us with. These normal engineering videos are so much better.

[@misterhat5823]

That was really shady. I came very close to unsubscribing.

[@mdhasiburrahman8806]

Once I played a bridge building game and man I know how tough is to get the right structure

[@muhammed_ajwad]

Wow!!!! Amazing video and amazing channel. Excellent explanation and cool animation. Keep going.

[@dextrogaming4316]

We need more of these, thanks for the video.

[@letseat-street5873]

Fact is that they were made many dacades ago and still functioning at its best- the amount of hardwork and intelligence is unmatched today- without proper technology they made it possible

[@VijayKumar0348]

It is requested to lesics CEO that plz makes videos on civil engineering 😊

[@3mileshi]

I totally want to walk across it

[@azamhazami6230]

For what i understand these bridge are using some kind of called "tensegrity" n the most vulnerable n critical part of the bridge is the at the center if the parabolic shape n the bridge connection are weak, it can collapse immedietly n it must be very very strong enough to hold n support each other (the arch n bridge are simply pulling each other so both will cancel the pull n push n thus make it balance) the end both of the arch n the bridge are only to place or make sure the bridge stay put on the ground...more strees on the bridge is also not a problem because the tensegrity are designed to handle much force n good at distributed the mass all over it equally as long as the connection at center between arch n the bridge (hangers) are strong...

[@my_dear_friend_]

1:48. Pretty sure that the triangle (A-frame) is stronger if(!) the load is only applied in the middle as in your example. Scissor lifts are a good example where such a design is used. Of course that is not practical for a bridge where the load needs to be distributed across the whole length.

[@hoangkybactien7207]

When you do a video on tie-arch bridge, take a look at Lupu tie-arch bridge on Huangpo river in China. I think this bridge has a flaw design. It is still standing, but they had to add more steel cables to hold the arch from collapsing. I don't expect this Lupu bridge to last long. The Sydney harbour bridge is the true engineering marvel. The best bridge design and built of all times. Suspension bridges are very costly to do maintenance. Turkey just had the longest Suspension bridge in the world. Its support tower look a bit skinny. How long will it last?

[@ksli57]

Well, the real professionals at the International Association for Bridge and Structural Engineering think otherwise. They gave the Lupu bridge an award and I trusted their opinion more than a random guy on the internet! Also how long should a bridge last?🤣

[@bappadey4197]

Really this architecture is amazing, sir 👌 But I've a request here. If possible, please make a video on Howrah Bridge, it called Rabindra It's a Suspension Bridge. At West Bengal in India. I hope you can do it. Thank you sir 🙏 Jai Hind 🇮🇳

[@rajatmishra4556]

Nicely modeled the Vande Bharat train on Chenab Bridge

[@streetstudy]

This is a indian channel it is, fantastic

[@peecee1384]

The Sydney Harbour Bridge is truly one of the worlds great bridges. There were no computers then it was all done with pencil and paper. Thank you Mr. Bradfield. P.S. You forgot to mention that the towers at each end are just for show. They don’t provide any engineering function to support the bridge!

[@RahulKumar-zj8wj]

Plz explain Howrah bridege too

[@viniciuscarneiro650]

Awesome video. I’ve got a suggestion/question. Would you guys consider using metrics system? :)

[@i_Kruti]

it may be because SABIN lives here in INDIA 🇮🇳 and most of the viewers are from here ..... and metric system is used a lot all over the world.....

[@MH-md2gw]

@@i_Krutiindia used imperial system?

[@vishalhappyworld]

Nice video, Can you make Wind turbine construction for both Onshore and offshore.

[@MrMessy1986]

‘Suspension bridges always sway so they cannot handle freight train’ Is Tsing Ma Bridge in Hong Kong a suspension bridge? It handles quite a lot of traffic and it’s super long with train on it’s lower deck, the wind is also crazy there, how does it work?

[@MrTanmoyHacker]

You can also make a video on the beautiful engeenering behind 'Howrah bridge' (kolkata) *Not having a single nut or bolts in this bridge and it's still young from past 80 yrs.