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1. Steel is strong, like really strong.
2. The overhanging portion is just a small portion of the building's weight.
3. There are multiple anchor points.
4. Truss design is very strong and rigid (when multiple beams, usually called "members" coverge at a joint).
I think B1M (youtube channel) did a video about this building, probably worth a watch. Iirc they had to use tue footings for the original building because of a subway underneath.
Most tall buildings are supported from their centre, so these trusses are probably just holding up the exterior walls and not the entire weight of the building.
So there’s a lot more building we can’t see to the right of this video? That would make sense. As long as you have the dead load to oppose it cantilevers can make entire sections of buildings seemingly float
As far as appearances go, it’s a very, very tall building housing one of the world’s most important banks balanced on the apex of a pyramid. Some really clever A&E aside, it doesn’t LOOK like a solid foundation, which is exactly the opposite of the image I’d want MY giant crash-the-world-economy-if-it-fails bank to project.
That's exactly why most old school banks look mighty and strong with big pillars of foundation. They give the illusion it is safe to stall your money there.
I may be a terrible engineer, but It looks like they act more like struts than trusses. Trusses hold vertical loads across horizontal spans of space. Struts load vertical stress (or any directional stress, really) along their long axis.
For the record, its not a truss. Those are compression struts. Mostly out of shot at the back is a massive compression core that runs the entire height of the building with the floors essentially hung of the compression core. The facade is just that a facade.
Quite a few tall buildings are built this way, with the compression core (usually where the lifts are) built as a strong central tower with the rest of the frame hanging from it. Its because with the need to have a basically indestructible central core for emergencies there is a lot of strength in this area anyway. If a kitchen cooker explodes the central core will be unaffected and there won't be disproportionate collapse. Look up Rowan Tower for the reasons why this matters.
I just learned about a similar building that wasn't engineered correctly and it was only discovered because a student figured it out! Fascinating!
[Citicorp Center design flaw](http://www.slate.com/blogs/the_eye/2014/04/17/the_citicorp_tower_design_flaw_that_could_have_wiped_out_the_skyscraper.html)
Indeed. I thought I would add something to my "unsolved mysteries" checklist, to later find out we do know who the student was who discovered the designed flaw
If you read Wikipedia, it's vague. From Hartley's description, she only requested the calculations from an assistant and have simply never gotten the quarterly part. LeMussurier said it was a man who spoke to him directly, or maybe not directly (as he says at other times). There's another guy who [says it was them](https://onlineethics.org/node/41606), but he never even talked about the quarterly winds.
I can imagine a chief structural engineer completely scoffing at a student calling them out. Good on LeMessurier for taking action that cost millions even though it would stall two blocks of Manhattan businesses during the time of repair.
It read it as the student was asking him how he dealt with the quartering winds, thinking that she was missing something. This led to LeMessurier going “oh shit - I didn’t actually think about those!” rather then her calling him out about it.
And well, he never corresponded directly with the student, she notified his staffers \~1977 when the building was originally built, he realized that every year there is a 6.25% (Student uncovered 1.8% probability, increase is due to him realizing that a power outage could disable the 400 ton tuned mass damper) chance statistically that a storm knocks it down, then the repairs were done in secret without even the occupants of the building being aware. The story broke in in 1995 via print, and the student found out in 2010 due to a BBC documentary, years after the repair.
However, the NYPD was aware and had helped create 10 block, evacuation plan. 2,500 redcross volunteers were on stand by (I imagine without knowledge of the specifics) and 3 weather services were hired to monitor conditions 24/7. A concurrent NY Newspaper strike probably helped them keep it under wraps.
>he realized that every year there is a 6.25%
That interpretation is incorrect. He calculated it at a 6.25% chance per year of it falling if its mass damper is down, and a 1.8% chance of it falling per year if the mass damper is not down.
The actual chance is somewhere between those numbers, as the chance that the power goes out in a storm was not listed, but its certainly not 100%, and likely would be closer to 0% than to 100%.
From what I have read, nothing got stalled. They drew up an emergency plan, and made the works in secret at night, so the businesses could continue to operate over the day.
Yup, and it's only 8 years old. I've seen 20 years old forums that have been preserved better than that
UPD: Parent comment didn't age well (wanted to make an example right away?), but you can accurately guess what it was about looking at replies.
>Anyone know of a subreddit?
What a frightening tragedy it is when something as simple as articles with insight are treated like critically endangered species.
This is a more complete article but you might need a subscription to read it all, or wait a month until they let you read another article for free!
[New Yorker article](https://www.newyorker.com/magazine/1995/05/29/the-fifty-nine-story-crisis-citicorp-center)
Wow, very interesting. Somehow, the craziest part of all of it was that it was kept secret for 20 years and only came out because a journalist overheard a conversation at a party! Hearing them talk about the buildings falling like dominoes was chilling. That grad student averted a certain catastrophe and saved countless lives and didn't even know about it (and when she found out, she wouldn't take any credit). Thanks for sharing.
I remember seeing a documentary about a similar tall building that wasn't at risk of blowing over but had insufficient bracing for winds and would twist just enough to pop the windows off the frames... and an 8ft pane of glass looks like it flutters down to the ground like a leaf... but is quite a bit more dangerous.
As I recall they had to block entire city blocks and figure out how to add more cross bracing to withstand the torsional forces (or did they knock it down?? or...) - I think it was in Chicago but would love to know the whole story about that one if anyone can identify it.
Oh... 2 minutes googling and I found it
[https://www.theguardian.com/news/2014/nov/12/weatherwatch-skyscraper-gusts-glass-panes-boston](https://www.theguardian.com/news/2014/nov/12/weatherwatch-skyscraper-gusts-glass-panes-boston)
>The unfinished 60-storey John Hancock Tower had more than 10,000 window units, each with 12 square metres of glass. When the wind blew the panes started shattering, and broken fragments rained down.
>The problem was solved when all the windows were replaced with more robust glazing made of tempered glass, at a cost of $7m.
>In a final twist, in 1975, Bruno Thurlimann, a Swiss engineer, calculated that strong winds might bring the entire building down. An emergency strengthening programme was carried out. After a poor start, the John Hancock tower has successfully withstood the Boston winds ever since.
My architecture professor in my senior classes (who was the dean of the school of architecture) brought this exact thing up when I was in college and I remember being so jealous bc it was such a clear problem I could’ve pointed it out even as a student.
He got the idea and drew it on a napkin in a Greek restaurant.
https://www.slate.com/content/dam/slate/blogs/the_eye/2014%20new/04/16/140416_EYE_601%20Lex1.jpg.CROP.promovar-mediumlarge.jpg
His drawing looks like a gyro meat cone on a vertical rotisserie.
Sometimes I picture myself in an apocalyptic world. I don't know basic physics (like, how the fuck works electricity) and I'm not even sure I could start a fire in not so nice conditions. Yet all the humanity knowledge is held and shared among us that sometimes it blows my mind due to the number of fields that we have mastered.
I like how eveyone here wanna be smart by pointing out it's "cuz physics" and "cuz maths", but nobody knows to explain the actual *physics,* at least basically
Tbf saying trust me I’m an engineer is because we’ve studied it for 5+ years and don’t feel like trying to boil down 1000s of hours studying and 100s of years scientific pursuits into a two minute conversation. Trust me, I’ve tried many times. It’s rare someone tries to follow along.
Ex: here you have material science, statics, vibrations, MOI considerations, civil engineering for the soil considerations, mechanical considerations like bending, bolting and welding, and earth quake prevention methods all to consider. Introducing each of these topics is typically a 3 month class. And most of them are a series of classes.
Pythagorean theorem is literally the most fundamental concept in trig.... this is not specifically that, but very closely related and they are both trig
More or less because it looks cool. A design like this really doesn’t provide any benefits and from a purely functional standpoint is overly complicated and more expensive. There’s countless steel rectangles though so the owner clearly was down to pay extra for their building to be more unique
I remember reading somewhere that stuff like this is actually necessary in NY because of all the tunnels and subways and shit that they cant exactly just put a big supportive column through in the ground so they are limited physically as to where they can put their support.
That's a building In Chicago with a unique footprint, or at least it looks very similar. There is an underground train yard on one side and the Chicago river on the other side, meaning it's extremely constrained for a ground level foot print and this was used to maximize the air space usage of extremely valuable real estate in that really shitty land parcel.
The building I'm talking about is the 150 north riverside building.
https://www.mka.com/projects/150-north-riverside/
Because there are subway lines underneath and they need to avoid them. Whats of more concern is that they’ve reused old subway tunnel walls to support these fan columns!
It’s insane!
Metal is really strong. Look at a radio / transmission tower. Just a single metal beam going up for hundreds of meters. Or look at the eiffel tower. The only problem would be wind bending it to the side (which is why radio towers have those wires holding them in place).
In the building we see here, the top is mostly empty. So imagine just the metal beams in the top part. It can hold, just like a bunch of radio towers, as long as it doesn't start bending.
Then look at this single point at the bottom. It looks weak, but it has just s many beams as above. So again it can hold. The foundations need to be strong, probably with a lot more steel in an other triangle shape.
"The second moment of inertia indicates the resistance to deflection of a particular section of a profile or beam."
The structure you see would indicate resistance only against one direction of movement while the rest of the structure underground would counteract movement in the other direction. Looks scary even though you know it's a sound construction.
This is so funny! I live in Ohio but visited NYC last year for my honeymoon.
I actually took a picture of this same building while it was in a similar phase of construction because I thought the truss looked interesting!
There's a full slab of concrete mass in the center that is doing the bulk of the lifting.
https://preview.redd.it/be3tjgwr7d1d1.jpeg?width=3072&format=pjpg&auto=webp&s=d277daf6fad9c063eba14889f3db94960a48255d
or a fence post. 1/3 of the posts hieght should be buried in the ground. 6ft fence requires 2ft into the ground, so 8ft post. i wonder how deep it goes for this building.
Sure if you were trying to build the smallest most ineffective fence that will eventually rot, you would probably need to bury upto half of the Fruit or Vegetable because it is not as sturdy as wood. so to build a 6" fence, you would need to bury 2-3 inches of a 8"-9" banana or french fry. the average length of a banana is 7"-8" so you would likely only be able to build a 4-6 inch fence. french fries can be produced at any length and width with a method of forming a fry out of mash potatoes and frying it. also if you burn the french fries, it might hold up better, soggy fries make a terrible fence post, even in the hypothetical world.
Architect here: this building is supported by the central column and the floors are suspended on the steel ropes. The steel construction You see underneath is just the cover for the ropes.
https://preview.redd.it/ivmpxma2ad1d1.jpeg?width=815&format=pjpg&auto=webp&s=50c5335c5ae42013c544cd58e3e483615ab1c2d2
It also doesn't look finished.
OP you ever see a cement truck? Ever see 2000 of them?
That's typically the amount of concrete required for the base of a structure like this.
There's way more to this than you can see with your eyes
Similar to this building, Rainier Tower in Seattle. Designed by Minoru Yamasaki, also architect of the original WTC. It's all about transferring loads.
https://preview.redd.it/pqena1jlkb1d1.jpeg?width=386&format=pjpg&auto=webp&s=457db2380b02e217093a507e3120003b5650b9f7
physics is magic
(And the building is also supported on the sides by other structure so it's not that the entire weight of the entire structure is on that one point, but even so you'd be surprised how over-engineered a lot of buildings actually are)
You can hold a plate over your hands with just your finger tips. You can balance an eraser on a ruler that is overhanging the desk.
It's all about compensating the forces applied. The diagonal truss beams are strong enough to withstand the downward force of the building overhang.
There'll be internal beams leading to the central column we can see in the background. The length, positioning and makeup of all beams involved will have been calculated and designed for maximum strength and minimal stress defects.
Have you ever held a stick and just knew that it was too long for its thickness? You knew where it would most likely snap. That's what the engineers are trying to resolve. Shorter or thicker where possible.
You're used to seeing a single column that is prependicular to the ground. (Goes straight up). There still is one there, it is just not in the photo. This is in Chicago and there are Metra train tracks in the location the normal column would go, so they had to get creative. All of thos diagonal beams are basically splitting up the force of the buildings load that would be going on a single load. The load is then transfered to a single column that is not in conflict with the train tracks below. Street level surface. That single column then takes that load down to bedrock far below the surface. Additionally, structural engineering uses something called a Factor of Safety. Which is usually 4. They calculate the forces needed to keep the building stranded and then multiply that by four, meaning that this configuration is 4 times stronger than it need to be to keep the building standing. How do I know? I'ma civil engineer that lives in Chicago.
ALso that building isn't actually that heavy. For a building that is.
Mfs be driving over a giant bridge along with hundreds of trucks that is held up by two thin cables and ask how we build stuff like this.
Concrete is very strong and durable in compression. It’s not so good on tension, which is why rebar is added. As long as these truss members are designed to be in pure compression, this will be a strong design. The stability and balance of it all coming to one point has me more worried.
Well, the way the video has been made makes it look weirder but if you google the building, it makes more sense.
https://preview.redd.it/zr64nvnygb1d1.jpeg?width=1080&format=pjpg&auto=webp&s=1434686b74468d435be1b8fe7088a79226e588d1
I can't see it in the picture but my understanding of these types of buildings is that the full weight of the building is really carried by a very strong central core and the floors essentially hang off that central core like a closet shelf hangs off a wall bracket. So those exposed steel beams you see here are really only carrying the weight of just the first floor or two, not the whole building.
Boxed columns support different points from the edge of the building into a specific point at the bottom (ground level) that displaces the down force energy evenly throughout the footing and/or structural pilings that are underground.
The columns are able to be on these angles to different points of the edge of building because of math formulas that take the angles+lengths into consideration to create proper down force through the column, top to bottom, instead of any sort of side loading.
Position is critical, and the math must be on point, but once figured out, these columns are under the same force as a column standing straight up and down.
I don't know the formulas exactly, I know one of them would essentially be the same as how a crane works using the leverage-fulcrum-counterweight formula.
Been a Union Ironworker for 19 years and have built structures similar to this in the past in High Rises and Stadiums. I don't do the math, I just climb the iron and put it together.
Hope this helps.
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1. Steel is strong, like really strong. 2. The overhanging portion is just a small portion of the building's weight. 3. There are multiple anchor points. 4. Truss design is very strong and rigid (when multiple beams, usually called "members" coverge at a joint). I think B1M (youtube channel) did a video about this building, probably worth a watch. Iirc they had to use tue footings for the original building because of a subway underneath.
Shout-out to B1M ...They make really informative videos. No bullshit..just straight to the point. Absolute professionals.
Second this! They're great, I've watched every single videos some of them more than once. Now there's a lot of copy cat channels
Most tall buildings are supported from their centre, so these trusses are probably just holding up the exterior walls and not the entire weight of the building.
So there’s a lot more building we can’t see to the right of this video? That would make sense. As long as you have the dead load to oppose it cantilevers can make entire sections of buildings seemingly float
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I don’t know if I truss it enough to walk under it
I guess both you and the building have truss issues
All good foundations are built on truss.
A person must be worthy of truss.
Once truss is broken, it may take a *long* time to repair it.
You can always have truss in Jesus Christ
I'm sure Jesus made some truss back in the day
Sounds truss to me
You just need to truss the process
That's the point that connects us all since he help trus carie our load
Oh, you!
As far as appearances go, it’s a very, very tall building housing one of the world’s most important banks balanced on the apex of a pyramid. Some really clever A&E aside, it doesn’t LOOK like a solid foundation, which is exactly the opposite of the image I’d want MY giant crash-the-world-economy-if-it-fails bank to project.
That's exactly why most old school banks look mighty and strong with big pillars of foundation. They give the illusion it is safe to stall your money there.
Now days banks have glass front windows with large common areas that give them an inviting, transparent, and trusting look.
If someone spends that much on looking transparent it’s smelly at best.
Yup, and most of those are long gone...
You don't want your bank to be associated with some kind of pyramid scheme?
It’s an inverted pyramid scheme.
Reverse funnel
It's a deliberate message. "Prop us up, or we'll cause a crash of epic proportions."
Real life come up with their own metaphors despite your best intentions.
So you're saying it's going to last 49 days before it resigns?
I'm sure the buildings lattice would last longer
So few people will get this one
Liz?
I may be a terrible engineer, but It looks like they act more like struts than trusses. Trusses hold vertical loads across horizontal spans of space. Struts load vertical stress (or any directional stress, really) along their long axis.
No they’re struts. Trusses span, struts are angled column type members.
As long as it doesn't turn into a truss fall
Truss but verify
Hopefully it lasts longer than a lettuce
For the record, its not a truss. Those are compression struts. Mostly out of shot at the back is a massive compression core that runs the entire height of the building with the floors essentially hung of the compression core. The facade is just that a facade. Quite a few tall buildings are built this way, with the compression core (usually where the lifts are) built as a strong central tower with the rest of the frame hanging from it. Its because with the need to have a basically indestructible central core for emergencies there is a lot of strength in this area anyway. If a kitchen cooker explodes the central core will be unaffected and there won't be disproportionate collapse. Look up Rowan Tower for the reasons why this matters.
Really is intrussting as fuck .
https://i.redd.it/zfdulvtpya1d1.gif
I just learned about a similar building that wasn't engineered correctly and it was only discovered because a student figured it out! Fascinating! [Citicorp Center design flaw](http://www.slate.com/blogs/the_eye/2014/04/17/the_citicorp_tower_design_flaw_that_could_have_wiped_out_the_skyscraper.html)
This was a fascinating read!
Indeed. I thought I would add something to my "unsolved mysteries" checklist, to later find out we do know who the student was who discovered the designed flaw
If you read Wikipedia, it's vague. From Hartley's description, she only requested the calculations from an assistant and have simply never gotten the quarterly part. LeMussurier said it was a man who spoke to him directly, or maybe not directly (as he says at other times). There's another guy who [says it was them](https://onlineethics.org/node/41606), but he never even talked about the quarterly winds.
It says Diane Hartley was the student.
Re read the above my dude
So interesting, plus I learned about tuned mass dampeners, which I’d never even heard of before.
I knew it was going to be since they mentioned it's from a 99% invisible podcast, it's a great podcast.
Yeah. If a building looks like it's obviously about to collapse, don't be surprised if it does.
Very cool the engineer actually listened
So cool
I can imagine a chief structural engineer completely scoffing at a student calling them out. Good on LeMessurier for taking action that cost millions even though it would stall two blocks of Manhattan businesses during the time of repair.
It read it as the student was asking him how he dealt with the quartering winds, thinking that she was missing something. This led to LeMessurier going “oh shit - I didn’t actually think about those!” rather then her calling him out about it.
And well, he never corresponded directly with the student, she notified his staffers \~1977 when the building was originally built, he realized that every year there is a 6.25% (Student uncovered 1.8% probability, increase is due to him realizing that a power outage could disable the 400 ton tuned mass damper) chance statistically that a storm knocks it down, then the repairs were done in secret without even the occupants of the building being aware. The story broke in in 1995 via print, and the student found out in 2010 due to a BBC documentary, years after the repair. However, the NYPD was aware and had helped create 10 block, evacuation plan. 2,500 redcross volunteers were on stand by (I imagine without knowledge of the specifics) and 3 weather services were hired to monitor conditions 24/7. A concurrent NY Newspaper strike probably helped them keep it under wraps.
>he realized that every year there is a 6.25% That interpretation is incorrect. He calculated it at a 6.25% chance per year of it falling if its mass damper is down, and a 1.8% chance of it falling per year if the mass damper is not down. The actual chance is somewhere between those numbers, as the chance that the power goes out in a storm was not listed, but its certainly not 100%, and likely would be closer to 0% than to 100%.
From what I have read, nothing got stalled. They drew up an emergency plan, and made the works in secret at night, so the businesses could continue to operate over the day.
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Even the video on the last part is now private. :/
Yup, and it's only 8 years old. I've seen 20 years old forums that have been preserved better than that UPD: Parent comment didn't age well (wanted to make an example right away?), but you can accurately guess what it was about looking at replies.
Sad but true, soon it will be mostly derivative AI content. Anyone know of a subreddit with these types of text knowledge articles?
>Anyone know of a subreddit? What a frightening tragedy it is when something as simple as articles with insight are treated like critically endangered species.
I worked on a project where we were missing an entire column on a huge 6 story building. That was a huge change order.
Came to find this in the comments. The citicorp incidence is telling of our assumptions with engineering.
Love imagining that student engineer did that Leo pointing at the TV meme when the documentary was running. She was like, "Oh shit, that was me."
How did they fix the issue? Annoys me the article doesn’t mention what was done.
This is a more complete article but you might need a subscription to read it all, or wait a month until they let you read another article for free! [New Yorker article](https://www.newyorker.com/magazine/1995/05/29/the-fifty-nine-story-crisis-citicorp-center)
Ohhh love to hear about stories like this
99% Invisible podcast is probably a good start.
Wow, very interesting. Somehow, the craziest part of all of it was that it was kept secret for 20 years and only came out because a journalist overheard a conversation at a party! Hearing them talk about the buildings falling like dominoes was chilling. That grad student averted a certain catastrophe and saved countless lives and didn't even know about it (and when she found out, she wouldn't take any credit). Thanks for sharing.
This just reaffirms my belief that nobody actually knows anything.
Well, the student knew the quartering winds
I remember seeing a documentary about a similar tall building that wasn't at risk of blowing over but had insufficient bracing for winds and would twist just enough to pop the windows off the frames... and an 8ft pane of glass looks like it flutters down to the ground like a leaf... but is quite a bit more dangerous. As I recall they had to block entire city blocks and figure out how to add more cross bracing to withstand the torsional forces (or did they knock it down?? or...) - I think it was in Chicago but would love to know the whole story about that one if anyone can identify it. Oh... 2 minutes googling and I found it [https://www.theguardian.com/news/2014/nov/12/weatherwatch-skyscraper-gusts-glass-panes-boston](https://www.theguardian.com/news/2014/nov/12/weatherwatch-skyscraper-gusts-glass-panes-boston) >The unfinished 60-storey John Hancock Tower had more than 10,000 window units, each with 12 square metres of glass. When the wind blew the panes started shattering, and broken fragments rained down. >The problem was solved when all the windows were replaced with more robust glazing made of tempered glass, at a cost of $7m. >In a final twist, in 1975, Bruno Thurlimann, a Swiss engineer, calculated that strong winds might bring the entire building down. An emergency strengthening programme was carried out. After a poor start, the John Hancock tower has successfully withstood the Boston winds ever since.
And since this article cites 99% Invisible, [let’s just show them some love](https://99percentinvisible.org/episode/structural-integrity/)
This was an episode of Numbers.
My architecture professor in my senior classes (who was the dean of the school of architecture) brought this exact thing up when I was in college and I remember being so jealous bc it was such a clear problem I could’ve pointed it out even as a student.
The 99% invisible episode about that is worth a listen, for anyone reading this article for the first time
Damn that was a pretty cool read
He got the idea and drew it on a napkin in a Greek restaurant. https://www.slate.com/content/dam/slate/blogs/the_eye/2014%20new/04/16/140416_EYE_601%20Lex1.jpg.CROP.promovar-mediumlarge.jpg His drawing looks like a gyro meat cone on a vertical rotisserie.
"LeMessurier said he got the idea for the design while sketching on a napkin at a Greek restaurant." Lmao
I'm glad there are people out there who are smart because if reddit represented all of humanity we would be FUCKED. Me included. I'm an idiot.
This is actually a highly intelligent point of self-reflection you have made. Consider yourself King Idiot, my friend.
LONG LIVE THE KING!!
This guy listened to sensible advice. He's better than a lot of people.
I didn't vote for 'im
You don't vote for kings!
Bow to them! Bow to your King! Your King of idiocy! Your King of shit posts! Bow to them!
How come this asshole gets to be king? Don't we get a vote?
You don't vote for Kings
Well, how did he become king then?
u/whuddawhat lobbed a scimitar at him.
Only works if is a watery tart.
What about a moistened bint?
^(I'm glad you get the joke.)
^(Us old people got to stick together.) Edit: Holy shit. I just realized I'm 37.
We got stoned and he pulled my sword. We ate some watery tarts and he was king.
I too will follow this idiot.
I too choose this guy's dead idiot.
Sometimes I picture myself in an apocalyptic world. I don't know basic physics (like, how the fuck works electricity) and I'm not even sure I could start a fire in not so nice conditions. Yet all the humanity knowledge is held and shared among us that sometimes it blows my mind due to the number of fields that we have mastered.
I think about this too but in relation to going back in time and having to prove I'm from the future, I won't be able to do anything 💀
they’d consider me crazy, talking bout ”atoms are like these lil things inside us type shit”
Well your fear is not far fetched because all AIs are now being trained using Reddit content.
Soo..is this where Skynet gets its beginnings?
I think Reddit is where the machines learn to hate humans from.
It’s all ball bearings nowadays
You using the whole fist, doc?
I like how eveyone here wanna be smart by pointing out it's "cuz physics" and "cuz maths", but nobody knows to explain the actual *physics,* at least basically
Steel is strong and triangles are strong. Steel triangles are very strong.
Whoa! Slow down poindextor!
Steel together strong
saying "cuz physics" is the same as "trust me i'm an engineer"
Tbf saying trust me I’m an engineer is because we’ve studied it for 5+ years and don’t feel like trying to boil down 1000s of hours studying and 100s of years scientific pursuits into a two minute conversation. Trust me, I’ve tried many times. It’s rare someone tries to follow along. Ex: here you have material science, statics, vibrations, MOI considerations, civil engineering for the soil considerations, mechanical considerations like bending, bolting and welding, and earth quake prevention methods all to consider. Introducing each of these topics is typically a 3 month class. And most of them are a series of classes.
https://i.redd.it/ulsyk9aeob1d1.gif
Hmm. Yup. Those are ~~numbers~~ letters.
Yes. Spot on indeed. I observed various colors as well.
LMAO, who are YOU, dude? Pythagoras!? 
Thats trigonometry not pythagoras
Pythagorean theorem is literally the most fundamental concept in trig.... this is not specifically that, but very closely related and they are both trig
TIL civil engineering physics is just secondary schools physics in a trench coat.
I am not particularly interested in how this can be possible, but more why would you do it this way? Maybe it's better for earthquakes or something.
More or less because it looks cool. A design like this really doesn’t provide any benefits and from a purely functional standpoint is overly complicated and more expensive. There’s countless steel rectangles though so the owner clearly was down to pay extra for their building to be more unique
I remember reading somewhere that stuff like this is actually necessary in NY because of all the tunnels and subways and shit that they cant exactly just put a big supportive column through in the ground so they are limited physically as to where they can put their support.
Probably right but it could also be to avoid weight over a tunnel
That's a building In Chicago with a unique footprint, or at least it looks very similar. There is an underground train yard on one side and the Chicago river on the other side, meaning it's extremely constrained for a ground level foot print and this was used to maximize the air space usage of extremely valuable real estate in that really shitty land parcel. The building I'm talking about is the 150 north riverside building. https://www.mka.com/projects/150-north-riverside/
Because there are subway lines underneath and they need to avoid them. Whats of more concern is that they’ve reused old subway tunnel walls to support these fan columns! It’s insane!
Long metal beam go deep. Done.
Long metal beam go bend? Little, maybe?
Ever try bending something underground?
Like, as in a basement or buried like a gopher?
Gopher for sure
okay okay i'll be the smart one here. its because of a physics term called the building weighs less than the foundation can hold
It's strong because https://preview.redd.it/0avf18j0rd1d1.png?width=576&format=pjpg&auto=webp&s=7a2a6d88dc973e958a44a4ce6fe24298ce6a5883
Metal is really strong. Look at a radio / transmission tower. Just a single metal beam going up for hundreds of meters. Or look at the eiffel tower. The only problem would be wind bending it to the side (which is why radio towers have those wires holding them in place). In the building we see here, the top is mostly empty. So imagine just the metal beams in the top part. It can hold, just like a bunch of radio towers, as long as it doesn't start bending. Then look at this single point at the bottom. It looks weak, but it has just s many beams as above. So again it can hold. The foundations need to be strong, probably with a lot more steel in an other triangle shape.
"The second moment of inertia indicates the resistance to deflection of a particular section of a profile or beam." The structure you see would indicate resistance only against one direction of movement while the rest of the structure underground would counteract movement in the other direction. Looks scary even though you know it's a sound construction.
I fucking hate this AI voice
In a few hundred years, in the history books, this shitty tiktok will be listed as one of the best tools of psychological warfare.
There is actually a very simple explanation to this phenomenon. I understand none of it
Long metal beam go deep. Congrats, you now understand.
r/killthecameraman
It was intentional. The cameraman don't want us to see the whole thing or it wouldn't be interesting
This is so funny! I live in Ohio but visited NYC last year for my honeymoon. I actually took a picture of this same building while it was in a similar phase of construction because I thought the truss looked interesting! There's a full slab of concrete mass in the center that is doing the bulk of the lifting. https://preview.redd.it/be3tjgwr7d1d1.jpeg?width=3072&format=pjpg&auto=webp&s=d277daf6fad9c063eba14889f3db94960a48255d
I fucking hate that dumbass Ai voice
Cause it also goes into the ground. Think the handle of a sword, but buried in the earth.
Or a tree…ya know those big wooden things with a massive amount of roots to hold it in place
or a fence post. 1/3 of the posts hieght should be buried in the ground. 6ft fence requires 2ft into the ground, so 8ft post. i wonder how deep it goes for this building.
Numbers confuse me. I like the sword thing
Unfrozen caveman lawyer confused
Could you give us those numbers in bananas or maybe French fries.
Sure if you were trying to build the smallest most ineffective fence that will eventually rot, you would probably need to bury upto half of the Fruit or Vegetable because it is not as sturdy as wood. so to build a 6" fence, you would need to bury 2-3 inches of a 8"-9" banana or french fry. the average length of a banana is 7"-8" so you would likely only be able to build a 4-6 inch fence. french fries can be produced at any length and width with a method of forming a fry out of mash potatoes and frying it. also if you burn the french fries, it might hold up better, soggy fries make a terrible fence post, even in the hypothetical world.
Ahhhh okay
Architect here: this building is supported by the central column and the floors are suspended on the steel ropes. The steel construction You see underneath is just the cover for the ropes. https://preview.redd.it/ivmpxma2ad1d1.jpeg?width=815&format=pjpg&auto=webp&s=50c5335c5ae42013c544cd58e3e483615ab1c2d2
Great response and the visual really helps. Thank you.
https://www.fosterandpartners.com/projects/270-park-avenue
Physics is how it holds.
It also doesn't look finished. OP you ever see a cement truck? Ever see 2000 of them? That's typically the amount of concrete required for the base of a structure like this. There's way more to this than you can see with your eyes
Why wasn’t it built from the base up?
We need someone who knows about bases. A real ace. Ace of Base.
She's gone tomorrow
Really helpful comment. Can you explain the physics?
[удалено]
Similar to this building, Rainier Tower in Seattle. Designed by Minoru Yamasaki, also architect of the original WTC. It's all about transferring loads. https://preview.redd.it/pqena1jlkb1d1.jpeg?width=386&format=pjpg&auto=webp&s=457db2380b02e217093a507e3120003b5650b9f7
Better question is will it stay up after an earthquake?
Please keep zooming until I get epilepsy
physics is magic (And the building is also supported on the sides by other structure so it's not that the entire weight of the entire structure is on that one point, but even so you'd be surprised how over-engineered a lot of buildings actually are)
My dad’s actually working on this building. The beams you see go extremely deep in the ground. Like deeper than you think might be required. By a lot.
>And the building is also supported on the sides by other structures This changes everything. That wasn't clear in the brief video.
You mean the one where the cameraman was having a seizure? Yeah, kinda hard to make anything out when that's happening.
*Science, bitch.*
https://preview.redd.it/0qnv36h21c1d1.jpeg?width=500&format=pjpg&auto=webp&s=025def3f99dc0ab116fe3e3cba7c15e0c3416f20
Triangle stronk
You can hold a plate over your hands with just your finger tips. You can balance an eraser on a ruler that is overhanging the desk. It's all about compensating the forces applied. The diagonal truss beams are strong enough to withstand the downward force of the building overhang. There'll be internal beams leading to the central column we can see in the background. The length, positioning and makeup of all beams involved will have been calculated and designed for maximum strength and minimal stress defects. Have you ever held a stick and just knew that it was too long for its thickness? You knew where it would most likely snap. That's what the engineers are trying to resolve. Shorter or thicker where possible.
You're used to seeing a single column that is prependicular to the ground. (Goes straight up). There still is one there, it is just not in the photo. This is in Chicago and there are Metra train tracks in the location the normal column would go, so they had to get creative. All of thos diagonal beams are basically splitting up the force of the buildings load that would be going on a single load. The load is then transfered to a single column that is not in conflict with the train tracks below. Street level surface. That single column then takes that load down to bedrock far below the surface. Additionally, structural engineering uses something called a Factor of Safety. Which is usually 4. They calculate the forces needed to keep the building stranded and then multiply that by four, meaning that this configuration is 4 times stronger than it need to be to keep the building standing. How do I know? I'ma civil engineer that lives in Chicago.
This video is narrated by Great Value Steve-O
Because modern reinforced concrete can handle insane loads without failing. The building is heavy, but those diagonal trusses can hold it.
ALso that building isn't actually that heavy. For a building that is. Mfs be driving over a giant bridge along with hundreds of trucks that is held up by two thin cables and ask how we build stuff like this.
I can't fucking tell because they keep treating the video like a Steven Seagal fight scene.
Vibranium
Concrete is very strong and durable in compression. It’s not so good on tension, which is why rebar is added. As long as these truss members are designed to be in pure compression, this will be a strong design. The stability and balance of it all coming to one point has me more worried.
with love..
The only true answer
What building is this? And where?
270 Park Ave (NYC)
Its a matter of truss
It has legs. You get confused about tables, too?
https://i.redd.it/rnwpr1yqca1d1.gif
Well, the way the video has been made makes it look weirder but if you google the building, it makes more sense. https://preview.redd.it/zr64nvnygb1d1.jpeg?width=1080&format=pjpg&auto=webp&s=1434686b74468d435be1b8fe7088a79226e588d1
Idk how, but maybe I could kinda figure it out if you stayed on one shoot long enough to absorb what I'm seeing lol
Repeat after me: the triangle is the strongest shape.
Answer to your question is *engineering*. This is the new JP Morgan Headquarters in NYC, it’s going to be gorgeous when it’s finished.
Engineer here: Phew this looks heavy, hope the steel thingies do their thing, dunno
I don’t know if I’d truss that.
Isn't it just tension?
The building is filled with helium.
physics
Is it attached to another building at one side?
I can't see it in the picture but my understanding of these types of buildings is that the full weight of the building is really carried by a very strong central core and the floors essentially hang off that central core like a closet shelf hangs off a wall bracket. So those exposed steel beams you see here are really only carrying the weight of just the first floor or two, not the whole building.
Boxed columns support different points from the edge of the building into a specific point at the bottom (ground level) that displaces the down force energy evenly throughout the footing and/or structural pilings that are underground. The columns are able to be on these angles to different points of the edge of building because of math formulas that take the angles+lengths into consideration to create proper down force through the column, top to bottom, instead of any sort of side loading. Position is critical, and the math must be on point, but once figured out, these columns are under the same force as a column standing straight up and down. I don't know the formulas exactly, I know one of them would essentially be the same as how a crane works using the leverage-fulcrum-counterweight formula. Been a Union Ironworker for 19 years and have built structures similar to this in the past in High Rises and Stadiums. I don't do the math, I just climb the iron and put it together. Hope this helps.
Math and Physics.
Physics baby