Every Kind of Bridge Explained in 15 Minutes

[@PracticalEngineeringChannel]

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[@LordSlag]

@3:40 "To keep the bridge....Truss Worthy." HUUUUUUUUUUUUUUUURRR HUR HUR HUR HUR HUR!! XD

[@NIKOSPORTSreal]

The floating bridge was cool.

[@feicodeboer]

That French one at 8 minutes into the video.

[@regenwurm5584]

Bridgehead .

[@365Condoms]

my favourite is stressed-ribbon bridge, that i built in Lesotho: called Metolong pedeestrian bridge, but the nicest project i did, that i had most joy was Blackburn Pedestrian Cable stay bridge in Durban

[@muenstercheese]

"Oh, you like bridges? Name every bridge." "O.K."

[@69Deez_Nutz69]

Uh, uh, ummmm... London Bridge? 😮

[@brianedwards7142]

"Bridges? We ain't got no bridges. We don't need no bridges. We don't have to show you any stinking bridges!"

[@madkoala2130]

Does it need to be global or country specific?

[@JimTheFly]

And Grady took that personally.

[@stratisgeorgilis7703]

Who is writing “OK” like that you alien😭

[@gregorshovlin803]

This is genuinely some of the most peak KZbin content I’ve ever seen. Educational, well-produced, succinct, and written by someone with experience in the field. Keep up the good work!

[@chr.s]

The best thing that can happen. You have a bad day, you open KZbin and see "Every Kind of Bridge Explained in 15 Minutes - 3 minutes ago"

[@AdiJayanto]

And @kurzgesagt just dropped another Black Hole video. 😊

[@Rompler_Rocco]

AND @engineerguy just dropped a deep dive on duct tape

[@crikeste4441]

Hope your day got better!

[@sphygo]

Me. Today. My mood has improved greatly though, and I still have 6 more minutes before lunch break ends and it’s back to pain

[@Thecowboy4020]

​@@sphygoim on lunch to right now 😂

[@okz9844]

I think this is one of the only few channels who faithfully sticks to the actual content and serve the purpose of title and video, no rubbish just simple plain 100% pure knowledge.

[@AndrewMukon]

At my previous engineering company, I created a short presentation about the component of bridges, mostly to tell the other engineers who did not work on bridges, such as a drainage engineer or traffic engineers, and had a section on the types of bridges. My final category was simply titled , "complex combination or as we bridge guys say, headaches"

[@StarWarsExpert_]

Do you still have the presentation in a power point format or something else? I'm curious to learn more detail about the types of bridges. If you could share a presentation, that'd be helpful.

[@johniceland5027]

I'd also love to see the presentation. It could make a cool topic to present to my peers.

[@AndrewMukon]

Sadly, it was made at my previous company, and I no longer have the PPT file

[@AndrewMukon]

But the types I listed are slab bridges, girder bridges, arch bridges, truss bridges, trestle bridges, suspension, cable stayed, post tensioned, movable bridges, and complex combinations. I talked about wingwalls, abutments, bearings, bents and piers, bearing surface, superstructure, substructure, (which are semi ambiguous terms in bridge engineering... So don't use them, say deck or piers or towers instead of substructure). All other bridges are variations on these types. For example, extra dose bridge, like the pearl harbor memorial bridge in New Haven is just a variation of a post tensioned.

[@gatoalfa7]

I appreciate you adding the name and location of each bridge to the video. Thanks!

[@plackt]

3:36 i heard what you did there! “… to keep the structural elements truss-worthy”

[@seneca983]

Or maybe it's "trusworthy", just like Conservapedia.

[@FurTip]

Exactly my thought. Surely that's an intentional easter egg.

[@andrewharrison8436]

Glad I wasn't the only one to spot that.

[@vaclav_fejt]

That was golden.

[@pkobalt]

It's intentional. Closed captions have it.

[@chetlordremmert]

I cannot thank you enough for choosing to work with sponsors who you believe your audience may be more inclined to be interested in rather than just taking any sponsor. This shows incredible integrity and I have great respect and admiration for what you do and the impact you have on our global community. Thank you so much.

[@SoulDuckling126]

Me playing poly bridge: "Y'know I'm something of a bridge engineer myself".

[@sickynixx]

😂

[@dennisturgeon7019]

I can't believe he made no mentions of safety gaps anywhere in this video.

[@philb5593]

Poly bridge is such an amazing engineering game

[@JohnnyWednesday]

Polybridge? Real bridge engineers play pontifex and bridge construction set. We're not afraid of physics!

[@mumiemonstret]

And I thought I was an expert after playing World of Goo...

[@LuciusTheFox]

As a native Pittsburgher, I recognized every single bridge that's in Pittsburgh that came on the screen. If you love bridges you can absolutely eat your heart out, so to speak, in Pittsburgh! You gotta love the City of Bridges!

[@LeScratch89]

And city of stairs. So many stairs.

[@toobigtofit3584]

But not the tunnels. Ugh the tunnels.

[@upsilonalpha3982]

So much to talk about! It feels like this video was abridged.

[@gus473]

With puns like that, you may get decked.....! 😅✌️😎

[@SilverSword2000]

I will always truss you to make good puns! 👍

[@gordonwelcher9598]

I am sure Brandon has travelled by rail on most of these bridges.

[@joelmacdonald6994]

Booooo!!! 😂

[@fredsalter1915]

Exceptional video! Super high quality.

[@tres909]

You know what this needs.... A Bridge Reviewwwwww!

[@yootooooooob]

This is how I imagine an RCE onlyfans would be

[@andreaspitsch9004]

A load of BILFs for sure.

[@CasualSpud]

I heard that in my head as soon as I saw the title.

[@bernardocsantos]

Someone please summon him

[@dignusferox2570]

Bridge tierlist?

[@santoast24]

The Steel Bridge in Portland Oregon is a thrught truss double deck vertical lift bridge. The upper deck carries cars and light rail, the lower deck pedestrians, bikes and freight trains, oh and Amtrak. But what makes it SUPER cool is that it is the ONLY working bridge of its type in the world (theres one in Pittsburgh Pennsylvania I think but it doesnt lift anymore) and is unique in that the two levels lift independantly of each other! Its also the second oldest vertical lift bridge in America, after another Portland Bridge, the Hawthorn! Certainly an impressive bridge, and one that I often go out of my way just to have the joy of driving across

[@johnopalko5223]

For my money the prettiest bridge in Portland is the St. Johns Bridge. Tilikum Crossing is also very attractive, but it's a bit too modernistic for my tastes. I cross the Steel almost every day.

[@chicken_punk_pie]

Ahh I was looking for the Portland people. I can't believe he didn't show a single bridge from Oregon!

[@johnopalko5223]

@@chicken_punk_pie I know! I was disappointed.

[@bgold2007]

Thank you! I like the wiki quote " making the bridge one of the most multimodal in the world." en.m.wikipedia.org/wiki/Steel_Bridge

[@jmonsted]

Just finished "Engineering in plain sight" and passed it on to my niece. Thank you!

[@adamfisher5744]

As a bridge design engineer in Pittsburgh, this gave all the warm and fuzzies. I keep your book right next to my AISC manual👷‍♂️

[@evanlucas8914]

I had to chuckle as a native Pittsburgher. So many different kinds of bridges in one city.

[@seamlyshenanigans861]

Oh my goodness, yes. I had never seen anything like it!

[@rareroe305]

My mechanical engineer brother went on a vacation to Pittsburgh specifically to look at bridges.

[@Zachbruce180]

Once I saw the first one, I kept looking for more. Grady didn’t disappoint!

[@jeremyj8153]

@@rareroe305 that's the nerdiest reason to choose a vacation spot. love it

[@secretlyaskrull]

I was pleased to see Pittsburgh appropriately represented! If Grady ever finds himself up north, it might make a fun video!

[@fortheloveofcake93]

The lentil trivia fact blew my mind more than anything in this video

[@joshl4111]

I came here to say this 😂

[@bgold2007]

I hate the lenticular look

[@drain_001]

Same!

[@watty9297]

In German, they use the same word for lens and lentil: Linse

[@The_Allstar]

Now that's what I call a proper Bridge Review

[@SpecialDeFX]

Yup, I came here expecting this.. and i'm not surprised. We be Nerds.

[@iwansays]

6.9 out of 6.9 Bridge review....

[@RadarLakeKosh]

So many BILFs in this video... 🥵

[@KitHale-ks3xm]

RCE!!!!

[@eliseleonard3477]

There’s nothing that makes the world seem normal and hopeful like Grady explaining cool stuff with that unique blend of clarity and wonder.

[@tumbledryshoes]

It feels like someone pulled a "Oh you like civil engineering? Name every kind of bridge" and this was Grady's response.

[@rmitchell8439]

And that is why I applaud his efforts.

[@FltCaptAlan]

Here's a drinking game for you: take a shot every time a bridge from the Pittsburgh area is displayed in this video

[@vintibo]

Akashi Kaikyo Bridge: Twin hinge three span continuous stiffen truss girder suspension bridge with a double tower system. I can now impress my friends in Kobe Japan with that knowledge. Thank you Grady.

[@bgold2007]

Only if you can do it in Japanese!

[@asefademelew3192]

Mister Akashi Kaikyo How Can Get Japanese Engineering books in English written

[@zippySquirrelface]

I'm a bridge inspector. I saw three of my bridges in this video! ❤❤ Thanks for making this!

[@jerrysinclair3771]

Thank you for using "our" LIFT BRIDGE in our city, Jacksonville, FL. Built in 1949, its gothic look and key part of the downtown architecture has made the "Main Street Bridge" a landmark for my favorite city. Thank you for the 15 minutes on bridges.

[@gus473]

It IS cool, but few bridges define a city more than the Aerial Lift Bridge in Duluth, Minnesota! 😎✌️

[@jerrysinclair3771]

@@gus473 I agree...much history there too!

[@medea27]

The best thing about videos like this for an engin-nerd like me is learning about new structures I wasn't aware of.... I'm now off down a rabbit hole looking up that Rolling Bridge in London & the transporter bridge in Spain. 👍 And I'd completely forgotten about that photo @ 7:27 ... it's such a brilliant way of demonstrating how the forces work as you can imagine how the weights & supports would feel in your own hands. Bridges really are human ingenuity at it's finest!

[@jesselindsey9760]

Watching your videos makes me feel like a kid again. Your videos bring back that sense of wonder I used to have.

[@siljeff2708]

One thing Practical Engineering and Rick Beato can agree on is that bridges are awesome

[@rpm6085]

That would be a unique collaboration!

[@dielaughing73]

Take it to the bridge!!

[@virajsharma1654]

@RealCivilEngineer will really love this video.

[@jessegeiss7603]

I was thinking the same thing

[@billsmith1846]

Was scrolling down to see how long before RCE was mentioned.

[@monad_tcp]

RCE mentioned

[@TheDapperDog402]

Hello, fellow RCE fans.

[@meneldal]

Now we want a collab.

[@RobertFrench-xo6pg]

As a bridge builder I have managed or been involved with bridge construction and design for 40 years including 6 major cable stays, a suspension bridge, major segmental bridges etc. I think your programs are excellent eduction!!

[@KnowArt]

The Dutch highway administration refers to their bridges as artworks. As an artist who was making an animated video for them, I was thoroughly confused about what they meant for quite a while

[@HansLasser]

Same expression is used in French.

[@sanchises]

To be fair, thats just archaic use of language, not an expression of aesthetic value (similar to kunststof, kunstmatig, etc).

[@cr10001]

Bridge designers are often very conscious of the appearance of their bridges. There's a lovely illustrated book called 'Brucken' (Bridges) by Fritz Leonhardt, published last century but still in print, that goes into detail about the visual effect of elements of bridges. You can tell from many of the bridges that Grady has illustrated in this video that the designers were very conscious of the appearance.

[@HolgerJakobs]

@@cr10001 I'm sure the book is called _Brücken_ and not _Brucken_ because _Brücken_ is the plural of _Brücke_ (which means bridge).

[@Iloveswedes]

Artwork in their usage likely means anything made by human hands, not just things that are aesthetically pleasing.

[@antoinjanssen6875]

Thank you for putting in all the names and places of the bridges.

[@MisterNohbdy]

that shot of the Veluwemeer Aqueduct at 14:34 is insanely cool

[@shaha9]

It boggles my mind.

[@biggie_tea]

@@shaha9I used to sail there a lot and the weirdest part is that when crossing it on water you barely even notice it... It just feels like a regular short canal

[@jurjenbos228]

And the Erasmus bridge as well! You make the Dutch proud.

[@alexanderthomas2660]

My first response upon seeing it, was: “does not compute”

[@FoobarDesign]

@@alexanderthomas2660 It helps to think of it like 'just' an aquaduct. But on both sides there isn't a river but a lake. It's also really unassuming to drive through by car, it feels like just any tunnel. By boat it's just a narrow bit you have to pay attention at. The true beauty really shows in the famous drone shots

[@zonderafspraak]

Yay! So many Pittsburgh bridges! It really is fun how diverse they are.

[@jpe1]

About 30 years ago I drove over a bridge in Costa Rica that appeared to be a simple truss bridge with the deck on top, but when I got out of the car on the far side to look at it, it appeared to be a suspension bridge with the deck pushing down (via steel rods) onto the the suspension cables, rather than the usual suspension bridge design of having the road deck hanging below the main suspension cables. I’ve never seen a similar design since, and haven’t been back to CR to see it again or take pictures, but that’s what I remember about it.

[@theAessaya]

A quick google search and I think I may have found your bridge: _Rio Colorado bridge on the Bernardo expressway._ And it looks incredible.

[@cr10001]

That would be a most unusual design. I could see the point, you can use the suspension principle with a reduced height of the towers, BUT the cables below the deck would be unstable, they would 'want' to splay out sideways. The steel rods in compression would have to be fixed rigidly enough, and the deck would have to be extremely stiff in torsion (which most suspension bridge decks are not). Unless there was a stiff truss structure below the deck with the suspension cables just 'helping' to carry the load. I'd love to see a picture.

[@BigBigBigJeff]

I once went on the millau viaduct and the scale is mind blowing. The tallest pillar is taller than the eiffel tower, and there is 5 or so. Would recommend to anyone visiting southern France

[@kartofff]

For illustration : it's the one at 08:00. I drive over it every few weeks, as I remember there are 7 pillar : my daughter counts them every time 😀 The whole bridge drives in a slight curve and, most impressive of all, it was built on time and below budget !

[@gus473]

10:53 Great cameo, Grady! This is an excellent episode, and I'm glad the bridges' labels are clear! 😎✌️

[@therealbahamut]

I didn't search for this and neither did you. Yet here we are, getting a concise yet thorough run down of bridge types both modern and historic. This is a very good use for the internet.

[@veitforabetterworld]

My favourite type: Ethernet bridge

[@jpe1]

Nah, full wave bridge rectifiers are better 😉

[@anthonybernstein1626]

Or the Einstein-Rosen bridge.

[@lukezimmerman382]

So many luls for this one 😂😂

[@RCAvhstape]

Floyd Rose tremolo bridge.

[@RowanHawkins]

Recently month wise but 51 years ago, ether first had a working example.

[@Desincarnage]

It's always a joy to see some of the beautiful bridges we have in Quebec being showcased. Great video, as always!

[@julienotsmith7068]

Pittsburgh here, thanks for the love. The huge diversity of bridges is one of the coolest parts of the city. The Fort Pitt bridge-tunnel is my least favorite bridge due to DRIVING it. 😁

[@Sandriell]

It is however considered one of the best views of a city in the world. With how you come out of the tunnel, and then just BOOM, there is the city in all it's glory.

[@Zenkai76]

Great job, with such a long and complicated subject, I feel this video was the abridged version of this topic....I will see myself out....

[@19TheJohn93]

I never thought I'd watch an almost 20 minute long video about bridges. Honestly never noticed that there are that many types of them. This was was blast to watch

[@marcberm]

"Truss-worthy" got me 😂

[@xileets]

Perfect dry delivery too.

[@paulb9156]

9:20 I was engineering project manager during construction of the “stress ribbon” (or stressed ribbon) design pedestrian bridge over the North Saskatchewan River. It’s in Edmonton, Alberta (not Saskatchewan). Not many of those designs in the world. Its precast concrete panels have cables running through that are post-tensioned and anchored into bedrock. Stantec designed it and Graham built it. I was fortunate to have been a part of such a unique project.

[@RealAndySkibba]

Going to send this to RCE so he can do bridge reviews.

[@TheTransporter007]

Might as well send it to T. Folse Nuclear as well, since he can probably link this content to running a nuclear reactor in his review... somehow.

[@spazticle8752]

thanks I'm majoring in road and bridge design engineering (part of Civil Engineering), this will help me in the future as I just got into a my state's polytechnic

[@raineylights]

I just watched someone talk about different types of bridges for 17 minutes, couldn't ask for a better start to my day

[@memesfarsi3111]

I love the fact that you put name and location of every bridges you show in this video Thank you for your effort

[@Odin029]

"or stunning sanitary sewers..." Grady, London is on the line. They'd like to have a word.

[@proberts34]

Fantastic video, Grady. Thanks for posting it. In the spirit of your "types of" videos for construction equipment and bridges, i see a number of potential topics for future consideration, including: • Farm equipment • Tractors • Temi tractors • Semi trailers • Cargo ships? • Military ships • House frame materials (e.g., mud brick, compressed earth, clay brick, concrete block, wood frame, those interesting clay blocks that Germans and many Europeans use, etc.) • Roofing materials (e.g., asphalt, asphalt shingles, slate, clay tiles, tin (metal), thatch, some sort of membrane, etc.) • Canals and/or locks types? • Vehicle suspension techniques/systems • Dams and spillways Just some ideas for thought

[@jolttsp]

We need a reality show where Grady goes and hangs out with civil engineers and construction workers on site and just fanboys for like an hour learning and relating, helping out competing in little challenges. I would live vicariously through that so hard 🤣

[@cslivestockllc138]

Pittsburgh definitely won, NY came in second I believe. Was happy to see New River Gorge bridge in WV …. You made this interesting, thank you!

[@armyflyboy2006]

Thanks for adding picture sources!

[@Mountaineer3615]

Happy to see Pittsburgh represent strongly in a video about bridges.

[@timowagner1329]

trussworthy I love you Grady

[@vaughnsvendsen7913]

Thanks!

[@JKTCGMV13]

I recently crossed a couple of low water crossings for the first time. There was a depth gauge in the middle and signs saying how deep it was safe to cross it. It was pretty freaky driving through a stream haha

[@AshrakAhmed]

I was sad when Akashi Kaikyo was not shown as part of the suspension bridge but Grady made the whole video perfect at the end! Thank you, Grady! Also awesome job including the name and location of all the bridges!

[@iamsnakemaster]

Love the video. One minor mistake at 9:22; the bridge is in Edmonton, Alberta, not Edmonton, Saskatchewan.

[@Stravant]

North Saskatchewan River... must be in Saskatchewan right?

[@Tj_Smeejay]

​@@Stravant I can't tell if you're asking a genuine question or being sarcastic, so I will answer the question just in case. The North and South Saskatchewan Rivers do both run through Saskatchewan, but the North one starts at the Saskatchewan Glacier in the Columbia Icefield, just outside of Banff, Alberta. The South one starts in southern Alberta, near Taber, and the two eventually meet in Saskatchewan at the Saskatchewan River Forks, becoming The Saskatchewan River. Edmonton, the city, is in Alberta.

[@rosswhitehead3868]

I came for 7:13 and was not disappointed. What a structure. What a country.

[@MattBrownbill]

Here in the UK, the Liz Truss bridge only lasted 7 weeks. I blame very poor foundations and inadequate support.

[@robertsmith2956]

ahh we got you beat. The one in Florida fell the first day. I knew what happened. 920 tons for a pedestrian walkway across a 4 lane road. 2 tons was more than adequate.

[@jaysnively2472]

@@robertsmith2956 you missed the joke

[@gehrmannsparrow]

You are a gem Grady. Everytime I doubt and question why I took engineering, your videos remind me how beautiful and fascinating engineering really is.

[@cinquine1]

...it probably says a lot about me that I saw this title and instantly knew I was going to delay my work start by about 20 minutes

[@peterharper8216]

That bridge at 0:50 in Brazil is a thing of beauty.

[@CheezBoyz2009]

That's some art right there

[@zunkman1]

I see lots of Pittsburgh bridges in your video. Gotta' love the Smithfield Street lenticular bridge!

[@Mehlo...]

Fantastic video as always. I was already going to hit like and then I saw your advertiser. This is the first video where the advertisement has made me want to click like even more. This is the only type of news people should be getting in my humble opinion. There's far too much opinion and bias in our news to get news from a less transparent source. Keep up the great work

[@cyrilio]

I'm in love with the Forth Bridge. In my mind it's one of the 7 new world wonders and want to see it in real life some day.

[@oleran4569]

That would be a great topic for a series! The 7 wonders of each century since well recorded history began. Each would involve engineering from differing knowledge bases.

[@Jaymac720]

I'm working on a project that involves a bridge. The majority of it is just a beam bridge, but we were exploring the possibility of making one of the spans into a truss so that it can be longer. The problem that pretty much killed that idea is that it's on a curve that requires superelevation. Another thing we were trying to avoid was a straddle bent. A bent is the cross member that sits on top of the columns and supports the girder while a straddle bent is an extra wide bent that straddles another piece of roadway. Straddle bents are unsightly, expensive, and annoying to construct because the bent itself needs to be a lot deeper and have more reinforcement. I won't go into the math of it, but I think you can see where I'm going. We managed to work around it in the end by realigning the roadway and skewing some of the other bents. Suffice it to say, bridge engineering is not simple at all. Structural engineering in general is really difficult which is why it often requires additional licensing on top of a PE license

[@Oliveira_HS]

13:45 at least here in Brazil, we call viaduct the bridges over land (asphalt, other viaducts, etc); and call bridges the ones that pass over bodies of water (lakes, rivers, canals, etc)

[@matsvanzelm7220]

The same here in the Netherlands.

[@notahotshot]

Yes, that's what he said.

[@milindankur]

Yeah, that's why I love this channel! He is true engineer by DNA! I wish @PracticalEngineeringChannel could bring up more detailed videos with some calculations on the various types of stress forces interacting with each other on the components of the different types of bridges. But I understand, that type of video would be called boring on KZbin and views would have been far less. I love bridges and always pause when I see a new one to understand how do they plan this one for balancing out forces? A good design, strength of the material, weight/force balance, aerodynamics, temperature, humidity, surrounding air quality, load prediction, etc. can be many challenges but all are conquered by engineers to build a bridge!

[@anotheruser9876]

Pronunciation of Fort de Roovere was spot on!

[@arjen1315]

Almost, haha

[@jonathanm9436]

I LOVE this video = an injection of lots of shallow information in a short time. Just the thing for showing off to friends and colleagues. Love your work!

[@rwdavidoff]

I see you (or somebody filming your B-roll) had a fun trip to Pittsburgh for parts of the B roll here.

[@cartertrautmann6523]

9:20 this one's from my hometown! but has tragically been labeled as in Saskatchewan instead of Alberta. It's a gorgeous bridge though, it was super cool to see the examples from all around the world called out.

[@dalenesbitt]

9:23 Edmonton is in Alberta, not Saskatchewan.

[@Lukesab3r]

Kudos to you guys for presenting a project and experiment that ended up falling short of your expectations. Speaks massively to the character of you and your team. Great video and awesome test!

[@somedriftguy3849]

Real Civil Engineer has been awakened

[@GuzziHeroV50]

You always manage to make what should be boring (to the layperson) subjects interesting! When I got up this morning, I didn't expect I would be searching 'differences between Parker, Camelback and Bowstring bridges"!

[@TheArchaos]

Arch bridges are always beautiful.

[@jajahgadis]

Can't believe our humble Bethanga Bridge, in country Victoria/NSW Australia made this video 2:45 . I've ridden my bike on it many times, always impressed by the metal structure.

[@PowerScissor]

You forgot a few kinds of bridges. Bridge of the nose. A bridge on a ship. Musical bridge. Dental bridge. The card game. Ballet pose.

[@VictorPenteado]

and my favourite: holiday bridges

[@je2555]

The actor Jeff.

[@BirdDwellingsCanada]

9:22 Quick edit: this bridge is in Edmonton ALBERTA (not Saskatchewan), Canada. I actually ride over it in the summer. :) All-in-all an excellent video!

[@nicholasfrediani9466]

Yeah!!! I knew Pittsburgh had to in here a whole bunch. I love it. 412 baby😊

[@xuthnet]

Yeah, I noticed 4 (edit: 6) scenes from PGH (one that was used twice, so 7 instances). There are some other bridges in PGH that would have been fun to include. Kind of wonky but I really like the concept of a Wichert Truss Bridge which was specifically designed to be "statically determinate" using pencil and paper math available in the 1930s. The Homestead Grays / High Level Bridge is a notorious example of this.

[@xuthnet]

Basically just took a trip down the Monongahela listing almost every bridge until they got to the point (skipped only the Liberty Bridge and a couple train bridges) and took a short trip up the Allegheny to the 3 sisters (skipping only the Fort Duquesne Bridge).

[@kelly-bo-belly]

An abridged explanation that bridges the wider world via the internet.

[@corrpendragon]

A 9.5 out of 10! BRIDGE REVIEEEEEWWWWWW

[@Ric-Phillips]

This video is a good illustration of the difference between ‘categories’ and ‘patterns’. Categories have to have instances, and rules that allow us to assign instances. Patterns don’t organise elements into sets- they exist to inform design and analysis and are incredibly useful in any kind of design task.

[@chrisleech1]

Love the parrot shirt 10/10

[@thelutheranknights1404]

cable suspension bridges are my favorite by far. From when I was young, I always trembled with awe at the might of those magnificent marvels of man's ingenuity .

[@gelinrefira]

LOL it is hilarious that you are showing the Millennium Bridge in London which is such a shoddily designed bridge that it swayed when people walked on it. They had to close the bridge down to reinforce it. Truly a marvel of western engineering and creativity.

[@thomasrapp2536]

It's amazing the number of bridges you showed in you video that I have crossed. Live in the Pittsburgh area, so have been across most that you showed. Have been across most shown from London and Scotland. Firth of the Forth bridge was impressive, as was the "Harry Potter" viaduct. Rode over it behind steam power. As always first thing I watch when they come out.

[@Cylonknight]

I’m gonna play polybridge while rewatching this, 😂.

[@tudorjason]

As a Seattle area resident, which has 4 of the 5 longest floating bridges in the world, I appreciate you including this relatively unknown/forgotten bridge design.

[@wolfiesgaming5216]

Doctor: You only have 15 minutes left to live. Me:

[@aholesahole]

Ever since getting Nebula, I'm enjoying watching early. But watching it for the second time is it's own perk.

[@mitchellnagy6667]

*Pittsburgh has entered the chat*

[@trankiet362]

Love the video and all the bridges shown, they were just amazing!! I'm a structural engineer from Vietnam, and I mostly work on long-span steel roofs.Almost all of the projects Ive been worked on involve truss structure, so I'm really looking forward seeing a video specifically on kinds of trusses structures.

[@Alex_Pro_A]

More than decade ago I learn most of the types of bridges to beat the game about bridges building (don't really remember the name). There were exact maps with the small variety of places to anker, and requirements for amount of cars and boats that can pass in same time. So, during the testing, bridge can collapse because of weight of load or because of boat collision. The most fan way to learn something, is where you need to resolve some isues by your own. So you "reinvent" some already existing approaches or simply go and ask questions: how does people resolving such issues in the real life anyway?

[@spectacularbear]

poly bridge!

[@Cormacc]

I want to thank you for all your videos. In addition to enjoying them, I also learn something from each one.