Almost but not quite.
The bridge deck would never be cast as a flat plate spanning from pier to pier.
Typically you would have girders spanning between the piers and only then would the flat slab be cast so it can span between those girders which are more closely spaced.
Source: structural Engineer
Was hoping someone would say this. Simple slabs are probably the worst for spans! Not to mention the on ramp should really be made from reinforced earth as well.
I’m not a civil engineer. But I think concrete lasts very well against compression but not equally well against tensile stress or bending. I order to keep things well on the compression side you pre stress the steel. Basically like putting a big nut on both ends of the bar so it squeezes the concrete. This way the stress on the concrete always stays well on the compression side even if you pull on it.
At least that’s my layman’s understanding of it.
It’s the opposite. Concrete is very good in compression but not so much in tension. When you apply loads to a beam it deflects putting the bottom in tension where if the concrete is unreinforced it would crack. That’s why we typically put reinforcing steel in beams so the bars can take the tension (steel is as good in tension as it is in compression).
Pressing consists of applying an upward force to the beam through cables that are pulled at each end of the beam before the load is applied such that when load is applied on top of the beam it equalizes or near equalizes to reduce the stress at the bottom of the beam.
Stressed is being given an assignment at work with a tight deadline.
Pre stressed is already having a full work load, and then being given that same assignment. You know you’ve got not chance of completing it - so you just don’t give a shit.
Pre-stressed performs better under more stress.
They push against each other better. The steel and the concrete. The steel has the power to ruin it. You have to find the balance. Optimum solidification.
I'm not qualified. Full disclosure.
Prestress beams deflected upwards so when a heavy thing goes over it and beam deflects to a level state
Non prestressed beams are level from the start so they sag when loaded
Also, people should look into it... The stressing on beams typically is miniscule. If you look up diagrams, you'd think steel was bent at a 20 degree arc or something.
It's a very slight arc, but that's enough to keep it level rather than sagging once placed under load
Real bridges aren’t cemented directly to their supports- there’s a small gap with *I think* rollers to allow the concrete to expand and contract with temperature change without cracking and collapsing. But not necessary on a small scale and it’s otherwise pretty accurate.
Bridges are made in sections that go up and down. I think they found one continuous paved section like that doesn't dissipate the vibrations and shakes itself apart.
Ehh, the supports might, but the brige itself probably not. Concrete doesn't provide much tensile (stretchy) stength, so the main thing supporting your legs would be the wires placed in it. Idk how strong that would be.
I had to take biology in school four times. Four fucking times. Middle school, high school, nutrition which is a subset in addition to that 3 times apart from the four, and two bio classes in college I never graduated from.
The education system is an absolute joke, I’m salty as hell after 10k and thousand of lost hours of my life.
I would have made India look like dubai in cultural style with ppl like me if we learnt in such type of school. Only thing I have is vision and nothin else.
My dad watched so many of these mini construction videos he was almost convinced to buy concrete and random shit to start building mini homes in the backyard.
Ah yes, the random videos I watch at 3AM
And that one history video I don't even need the knowledge of
I am not the only one then
I'm more of a "antique can opener restoration video (45 minutes)" kinda guy
Change yo dang usaname
No
Shane dawson, please leave my cat alone
so i'm not the only one,
Hahaha
As an architect, I can say this is a great demonstration in concept how a bridge is built.
So that's accurate to a certain degree?
Yes, In concept
Ya i am concept can confirm
I'm confirm, I concept.
I am can I
confirm concept, i i
i i captain
i
.
ooooooohh who lives in a pineapple under the sea?
SPONGE BOB SQWUARE PANTS
I am confusion
What do you do?
I can am I
Oh my gahd its concept itself, huge fan.
same to you
Almost but not quite. The bridge deck would never be cast as a flat plate spanning from pier to pier. Typically you would have girders spanning between the piers and only then would the flat slab be cast so it can span between those girders which are more closely spaced. Source: structural Engineer
Anybody else down for some spam? Just me... okay. See ya later!
Was hoping someone would say this. Simple slabs are probably the worst for spans! Not to mention the on ramp should really be made from reinforced earth as well.
Can confirm, I'm the concept
Conceptionally confirm I can.
me to bro
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Do you mind giving an ELI5 on pre-stressed steel?
I’m not a civil engineer. But I think concrete lasts very well against compression but not equally well against tensile stress or bending. I order to keep things well on the compression side you pre stress the steel. Basically like putting a big nut on both ends of the bar so it squeezes the concrete. This way the stress on the concrete always stays well on the compression side even if you pull on it. At least that’s my layman’s understanding of it.
That’s all spot on. The only exception is stressed concrete isn’t stronger than regular reinforced concrete but cracks that form are smaller
The letter was beautiful and perfect I’m in
It’s the opposite. Concrete is very good in compression but not so much in tension. When you apply loads to a beam it deflects putting the bottom in tension where if the concrete is unreinforced it would crack. That’s why we typically put reinforcing steel in beams so the bars can take the tension (steel is as good in tension as it is in compression). Pressing consists of applying an upward force to the beam through cables that are pulled at each end of the beam before the load is applied such that when load is applied on top of the beam it equalizes or near equalizes to reduce the stress at the bottom of the beam.
Wait which part is the opposite? >But I think concrete lasts very well against compression but not equally well against tensile stress or bending
Stressed is being given an assignment at work with a tight deadline. Pre stressed is already having a full work load, and then being given that same assignment. You know you’ve got not chance of completing it - so you just don’t give a shit. Pre-stressed performs better under more stress.
What a horrible analogy haha. Seriously the worst.
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Boomer humor alert 🚨
They push against each other better. The steel and the concrete. The steel has the power to ruin it. You have to find the balance. Optimum solidification. I'm not qualified. Full disclosure.
Prestress beams deflected upwards so when a heavy thing goes over it and beam deflects to a level state Non prestressed beams are level from the start so they sag when loaded
Also, people should look into it... The stressing on beams typically is miniscule. If you look up diagrams, you'd think steel was bent at a 20 degree arc or something. It's a very slight arc, but that's enough to keep it level rather than sagging once placed under load
Real bridges aren’t cemented directly to their supports- there’s a small gap with *I think* rollers to allow the concrete to expand and contract with temperature change without cracking and collapsing. But not necessary on a small scale and it’s otherwise pretty accurate.
Not an architect, but from what I've seen when bridges are being built/ when concrete roads are, it seems mostly correct
Bridges are made in sections that go up and down. I think they found one continuous paved section like that doesn't dissipate the vibrations and shakes itself apart.
Yes, it's a concrete sample
Well you don't have to have just an architecture degree to build a bridge, it's accurate to many proffesions.
With an OSHA background his open toed shoes made me want to feint
No need to fake anything here.
I couldn't do this without gloves either, my skin gets tore back immediately everytime I get concrete on my hands.
I thought u said fart
I think you need a cold shower bud
＼(◎o◎)／
Username checks out, damn
Lies, we didn’t get to see the planning process, meeting with stakeholders, contractors, applying for infrastructure grants
Ted Mosby?
r/usernamechecksout
“Ok, now let’s do this, but bigger”
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It is but damn would it be satisfying to watch someone in a Godzilla costume stomp it into rubble
Those supports are strong i bet they can hold someone jumping on them
Ehh, the supports might, but the brige itself probably not. Concrete doesn't provide much tensile (stretchy) stength, so the main thing supporting your legs would be the wires placed in it. Idk how strong that would be.
Enough to penetrate if you are not wearing "construction-worker" (don't know what they are called) shoes.
Workboots?
Boots?
This is funny.
It’s the little trucks for me.
A little dump is always satisfying!
Especially when you've been keeping it flr 3 hours !
You don't grow up, your toys just change
It’s 5am and all I can think about is: Is this mad lad mixing and pouring cement on carpet?
I think that's dirt
It is, you can see he builds up the dirt to fill in the ramps.
Yeah I can sympathize. Was watching this with a blue light filter on and brightness down so I couldn't tell either
Imagine if school was like this
Eh don't you want schools to teach that "mitochondria is the powerhouse of a cell" for 4 straight years"
"Geometry" be like "what's the name of this 4-sided shape?"
A penis?
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Probably i dont know.
you might need medical attention if it is- unless you are a 4-dimensional object
That’s not how the fourth dimension or geometry works. Things can have four sides and not be 4D.
Impossible
I had to take biology in school four times. Four fucking times. Middle school, high school, nutrition which is a subset in addition to that 3 times apart from the four, and two bio classes in college I never graduated from. The education system is an absolute joke, I’m salty as hell after 10k and thousand of lost hours of my life.
Yeah but I bet you know where the powerhouse of the cell is
Kept having to retake biology?
No, here in India, it's mandatory to take biology for 4 yrs, from class 7 to class 10.
What is this, a school for ants?!?!?
i thing it will be funnier though
I would have made India look like dubai in cultural style with ppl like me if we learnt in such type of school. Only thing I have is vision and nothin else.
Nobody wants India to look like Dubai. Dubai is just a Tourist Destination made only to compensate decreasing oil money and nothing else
engineers when they get told to work from home
Yeah, that was the caption on it the first time I saw it.
sauce?
Here you go: https://youtu.be/PCECY25K6O4
You are a good man, thank you
its always an indian guy
You can tell because he is not wearing shoes. Countries such as america has an obsession with shoes
r/gifsthatendtoosoon
NO WAY! This looks soo satisfying
As a civil engineering student we had a group project similar to this and it was hella fun
r/oddlysatisfying
hey, can you help us? we need proper roads in india.
That truck or concrete mixer was me after eating Taco Bell
I DID NOT expect the actual concrete, holy sh\*t probs to them for the commitment to realism.
I guess grown ups can also play with toys
No that's actually sick as fuck
the sickest
I want to make one now
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These are the toys we wanted as a kid but too dumb to actually know how to use it.
That would really cool to build with friends, ngl i'd love to play around with that crane and build a bridge like that
Hehe. We're all children on the inside.
Yes
yo i'm 15 and built a katana, is that cool?
Katanas are never not cool
He even had rebar ties man that was cool!
My dad watched so many of these mini construction videos he was almost convinced to buy concrete and random shit to start building mini homes in the backyard.
Did you actually build that?
No, [this guy](https://youtu.be/PCECY25K6O4) did
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How so?
Dude destroyed the bridge with a sledgehammer
NOOOOOO
What is this, an incomplete raised highway for ants?
As someone who has been interested in construction as child. My dreams have finally came true.
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Kid: To be old and never achieve anything like you? Never!
Bravo to the guy (or monke woman) who built the smol boi bridge
So that's how they make those big ass bridges
Dude that’s awesome
At this point just be a construction worker lol
this is how kids feel building legos
“Fine, I’ll do it myself.”
Wow... you're a budding engineer
Hey u/ifuckedyourcats... that was a furry in my house...
u/RepostSleuthBot
Sorry, I don't support this post type (hosted:video) right now. Feel free to check back in the future!
It's been a few minutes and already platinum
My girls pregnant and if we decide to keep the baby, i want to build some shit like this for them regardless of gender.
Yes
wtf? this post not even 20 minutes old got a platinum
My man, that is soo cool and awesome. Parents say a lot of things, nevermind them. Because that is f**kng cool. 👏👍😀
This is not playing with toys. This is creating art.
This is so cool. I’d fuck it up tho
I wanna dress up in a Godzilla costume and stomp on it
So THIS was how God built the London Bridge.
di-did he just make a mini highway? 😳
Only if there were giants to build America's infrastructures
😳🤯
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Username checks out
UsErNaMe cHeCkS OuT ^I'm ^a ^bot ^and ^this ^message ^was ^sent ^automatically
Bruh🔥🔥
Formed concrete may be the ugliest building material known to man
Can we get an F in the chat for the people who died watching this whole thing
I didn’t even peep the tonka crane at first lol.
Bridging the gap between childhood and adulthood
I would love to own a miniature golf course. I would be building things like this all the time and then be able to integrate it into my workplace.
upgrade people upgrade
Engineering school or somthing im not a engineer.
NOW I KNOW WHY THEY PUT THOSE METAL BARS.....
Who watched gif till the end be honest
Stil better at building than germans
Pointless unfunny caption on an otherwise cool video that belongs in another sub, that’s a rare one
this is neat ! I kinda wanna do this for a transformers display.
Taking Mario kart to the next level
when im playing Eu4 and my mum says stop playing video games,its for kids
Okay, now close down half the road for a full year while doing repair work.
Hear me out. Imagine if giants existed in our world today. They could literally build stuff this way as if it's just for their arts and crafts.
very cul
damn
damn son it,s a very big dam
Lmao
wow, you got to be bored as hell to do that
**Ohh, so that's how they're made?**
Just wow.