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
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 TH-cam 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
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 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❔
@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.
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 !
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.
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.
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.
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.
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.
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"
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
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.
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.
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.
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 🇵🇦!!!
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.
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.
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!
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.
I have a few douts; when you talk about the parable beeing the most efficient way to transmit load, you refer to the catenary? Or is the parabola so similar to the catenary that the difference between the two is minimal? Is the catenary the most efficient form of load transmission, if not why parábola it's better than catenari? Thanks a lot for the video, its amazing. love your work.
At 6:50 , it says the bearings allow the bridge to expand without internal stresses. The change of arc length is not causing internal stresses ? Expansion means change of length for the support structure Somebody has the explanation ?
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?
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?🤣
wow this video is super eductaional and amazing video that fulfilled my knowledge. would you mind posting more about structural reviews for stadiums and civil infrastructures ? thank you
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!
![CAMPปลิ้น | รวม Highlight 2024! PART [1/2]](http://i.ytimg.com/vi/6hnvNnvYloU/mqdefault.jpg)
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
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 TH-cam 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
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
the curve is actually called a catenary, parabola is an approximation.
@@janami-dharmam aka narrow block
@@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❔
@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.
@@Dragon-Slay3rxx❤
I like how Vande Bharat Express is running over Chenab Bridge 😅 hope to see that soon 🤞🏼🤓
Vande Bharat is lighter train
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?
@@ProfFeinman We have mentioned this fact, I hope you missed it 03:50
@@SabinCivil Please make a video on Howrah Bridge(Rabindra Setu) ; Kolkata ; India
@@SabinCivil 08:50
I love how this channel gets so into depth!!
This is awesome. And just like at 6:20 it's amazing what is learned over time when population and technology expands.
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 !
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.
times it by three and add your favorite number divided by two for metres :)
@@Jayesk "add your favorite number"?
A video covering the chenab bridge, India would be highly appreciated.
Great work!
i went to school near this bridge and you answered a lot of questions i have had for twenty years. Thank you!
Honestly, Your channel makes structural engineering more & more interesting
I can't stop myself to continously watching your knowledgable videos.
This is why Lesics is a FEATURE Channel on my TH-cam channel. Great art work Lesics, more of this. 👍
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.
It’s a brilliant bit of Engineering Construction 🇬🇧
Can you also add metric measurements in the next video? Thank you for your work
You made it so easy for lay audience to understand something so technical. Excellent work, keep it up.
Those videos are very satisfying to watch. Very well explained. Nice work, good job
Suggestion @Lesics, can you put also metric system in your videos. That's easier for the 90% of the world population to understand :) Thanks
You're very right 👍
Yah, we also have moved to metric units :)
i have a microbiology tomorrow and here I am learning about bridges!! , nice !
Such a awesome explanation ❤ big salute for your huge effort....
The harbour bridge isn’t a parabola - it’s a catenary curve inverted (a hyperbolic curve).
A parabola and hyperbola are significantly different.
Yep normally I use a cosh function this, this video is full of wrong information
Jip! Cables hang in a hyperbolic curve.
@@markoj3512nahh bro thins everything is wrong💀💀💀😎😎
A video covering the Howrah Bridge of West Bengal, India would be highly appreciated.
A bridge that stood the test of time!
Great work!
Masterpiece of engineering
@Steve Robinson why not
For anyone that doesn't live in Australia, it's just the sydney harbour bridge.
And it doesn't have 4 train lines; there's only 2.
@Gnuthad It was made clear that two train line were converted to road in 1958.
@@jackchapo2011 I seem to have missed that. Can you provide the time code so I can go back and listen again?
I like the way you give details about things. Thank you Lesics
I, as a man, feel proud. Yes, we built this world and I am proud of it.
Such lucid and simple explanation for complex engineering marvels! Amazing works, Mr. Sabin🎉!
Wow what a satisfactory and most brilliant construction, I am more than happy with your detailed presentation..
Thank you
Omg what an explanation!!!!😍♥️
Amazing video, thank you. Please tell why a parabolic shape is used instead of a catenary?
3:50
I am from India 🇮🇳 bro. I watch your videos, your videos are very knowledgeable. Love you BROTHER ❣️👍😊
Lol he is also from India 😆are you new here?
FANTASTIC VIDEO , YOU MAKE EVERY WITH DETAILED ANALYSIS AND MAKES EVERYONE UNDERSTAND THE ENGG. CONCEPTS IN SIMPLE WAY
The effort you put in explaining the science is as meticulous as the real construction itself. I was stunned and forgot to sit straight
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.
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.
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.
I do not think you can make out visually.
Awesome video. Explains much better than some teachers
This man never disappoint us
This is really interesting
Wonderful Presentation. ❤
We need more of these, thanks for the video.
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.
One of the best videos on Engineering 👍👍👍👍
one of the best construction animated video ever seen
Nice. I love engineering.
Salute to the Lesics team for constructing the entire bridge again just for us 😊😊
I don't know why I can't help but love your videos...
Awesome! Goes nicely with discussion of parabolic shapes in RealEngineering channel's video on the Sagrada Familia.
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.
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"
were replaced by roadways as per video.
Man, this channel taught me a lot
I'm happy that I'm watching this great animated explanation
Thankyou!
This is why, the strength of materials is very important to learn.
Wow!!!! Amazing video and amazing channel. Excellent explanation and cool animation. Keep going.
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
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.
As always, an incredible video!
I'm not a engineer student but I learn something new from your video. Thanks SIR💙
I learned civil engineering in 9:59 👏🏻
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.
This is right up my street. Thanks
Very good video! 😁
Just in time for this year's world famous Sydney New Year's Eve fireworks display! 🎇🎆
Beautifully Explained Thanks for sharing such informative videos, Kudos To Your Work ✨💥
🤯 Amazing, simply amazing, I doubt that this would ever be made in the USA because of it's design and safety, and money.
Fun fact, the chief engineer of the Sydney Harbour Bridge was inspired by New York's Hell Gate Bridge.
Keep making these videos they are awesome
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.
Tnx Bez of this video I have great talk with my dad about engineering
Explained in a perfect way.👍👍
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 🇵🇦!!!
Awesome video. I’ve got a suggestion/question. Would you guys consider using metrics system? :)
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.....
@@i_Krutiindia used imperial system?
Sydney harbur bridge was "Load testing the Sydney Harbour Bridge - Feb 1932" using 96 Steam locomotives
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.
Thanks for sharing 👍❤️!
sambil minum kopi pagi nonton tayangan yg berdaging emang asiikk....mksh ya atas kontennya...bermanfaat banget
If I had watch this channel when I was younger. I would have definitely studied architecture at the university.
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.
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!
You can also describe the arch as hyperbolic, sinusoidal, or cosinusoidal.
ok mihir chandran
and all of them will be wrong; the real shape is catenary en.wikipedia.org/wiki/Catenary
Fascinating!! 👏🏻
woww... this is very cool, the explanation in the video is very clear
0:40 this happens all the time when I’m playing Poly Bridge
Same haha
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
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.
Mulțumim pentru video si informații foarte importante și de baza
Awesome video! Thank you!
Great to see high quality videos again after that PCB marketing advertisement you tricked us with. These normal engineering videos are so much better.
That was really shady. I came very close to unsubscribing.
Brilliant history cool video mark😊😊
Thanks lot, much interesting video, Good luck to all!)
Thank you for this detail analysis
That's amazing
Geordies and men from the north east of England built this bridge when we were great.
I have a few douts; when you talk about the parable beeing the most efficient way to transmit load, you refer to the catenary?
Or is the parabola so similar to the catenary that the difference between the two is minimal?
Is the catenary the most efficient form of load transmission, if not why parábola it's better than catenari?
Thanks a lot for the video, its amazing. love your work.
8:54 wow, my country india ♥
it is indian channel
The animation is awesome!
rce has to watch this
Very knowledgeable video sir 👍👍
It's super Impressive!!
1:14 the small boat is king, he said he would call for help in getting the bridge rebuilt.
8:54 i was waiting for that
At 6:50 , it says the bearings allow the bridge to expand without internal stresses.
The change of arc length is not causing internal stresses ? Expansion means change of length for the support structure
Somebody has the explanation ?
I like your references of Indian technologies
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?
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?🤣
wow this video is super eductaional and amazing video that fulfilled my knowledge. would you mind posting more about structural reviews for stadiums and civil infrastructures ? thank you
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!
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 ❤