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

[@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❤

[@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

[@cwardo9810]

I love how this channel gets so into depth!!

[@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"?

[@nickmueller7850]

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

[@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 !

[@justaguy4real]

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

[@sumitchavan1671]

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

[@deveshsen1141]

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

[@AaronHahnStudios]

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

[@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 🇬🇧

[@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 :)

[@srinivasanv6573]

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

[@Welv1987]

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

[@Dark_Matter2]

Masterpiece of engineering

[@Dark_Matter2]

@Steve Robinson why not

[@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 !

[@johnnysins1781]

This man never disappoint us

[@aayishasparrow5548]

Wonderful Presentation. ❤

[@sheerazqureshi5052]

Omg what an explanation!!!!😍♥️

[@AlexDominus]

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

[@MARCUS-g9j]

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

[@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!

[@peaceloving1626]

One of the best videos on Engineering 👍👍👍👍

[@shamanjitsingh7267]

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

[@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💀💀💀😎😎

[@Franklinwin]

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

[@akashdas3313]

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

[@lijojosef]

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

[@lesserfield_]

Man, this channel taught me a lot

[@andrevale8610]

Awesome video. Explains much better than some teachers

[@tamimrahman9514]

Nice. I love engineering.

[@onlineskillsbyimranbilal]

one of the best construction animated video ever seen

[@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?

[@hocuspocustadaa4671]

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

[@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?

[@xaviersantamaria8618]

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

[@Rahul_Ahlawat]

3:50

[@mathangles3355]

Explained in a perfect way.👍👍

[@edisercer]

rce has to watch this

[@cach_dies]

As always, an incredible video!

[@aland.9060]

Keep making these videos they are awesome

[@Persistent24]

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

[@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.

[@maherkhalil7637]

Very good video! 😁

[@dennisphilip7596]

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

[@nbmufc94]

This is right up my street. Thanks

[@ltd7705]

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

[@BimDaTitanicNerd]

This is really interesting

[@sorinpetre6141]

Mulțumim pentru video si informații foarte importante și de baza

[@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

[@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.

[@winnipegtroll01]

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

[@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.

[@natividadlilio8960]

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

[@paulsoret585]

Fascinating!! 👏🏻

[@TrongNguyen1994]

It's super Impressive!!

[@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.

[@dextrogaming4316]

We need more of these, thanks for the video.

[@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.

[@T1DMeetsHalal1]

The animation is awesome!

[@thesonofkastakar]

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

[@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.

[@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.

[@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

[@pitriyanti549]

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

[@JordonRogers-i6d]

That's amazing

[@AJ-et3vf]

Awesome video! Thank you!

[@RiceBoy1975]

1:15 😂😂 I like how the little boat at the bottom left is like nah fuck this and just sails right past while the other larger ships stop

[@sopharpro]

Thanks for sharing 👍❤️!

[@Bemath_kh]

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

[@muhammed_ajwad]

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

[@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 🇵🇦!!!

[@MehtabReviews]

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

[@_maximka_1408]

Thanks lot, much interesting video, Good luck to all!)

[@iiSnely]

I learned civil engineering in 9:59 👏🏻

[@MarkMcDonaldHodge-g2q]

Brilliant history cool video mark😊😊

[@mehulchandegra6551]

I like your references of Indian technologies

[@ajieshaputro2550]

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

[@streetstudy]

This is a indian channel it is, fantastic

[@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.

[@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.

[@willh69]

These videos are so awesome

[@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!

[@SamarSekha]

This is called unity is strength

[@francistoledoabellana1913]

Wow so amazing ❤️

[@gbolagadeolajide8595]

What an explanation!

[@MossadCIA43]

Very knowledgeable video sir 👍👍

[@anthony9thompson]

Excellent video

[@BlueBloxRoblox]

nice as always

[@antor.j.medrano]

This is amazing.

[@rustycherkas8229]

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

[@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...

[@gpjoseph9807]

So nicely explained

[@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!

[@1945CCCP]

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

[@fireworkormosu]

This is gonna help me in poly bridge 2

[@rayperez4825]

Love these videos keep it going

[@yusufanshori6674]

Amazing video

[@arunmk21]

Thank you for this detail analysis