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(CNN)   World's scariest hotel swimming pool is cantilevered over the edge of the 24 story building and has a clear glass bottom   (cnn.com) divider line 146
    More: Scary, swimming pools, Holiday Inn  
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30019 clicks; posted to Main » on 10 Aug 2012 at 10:48 AM (2 years ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-08-10 12:31:42 PM  
Only if Montgomery Scott was the engineer in question.

/Captain, there be whales here!
 
2012-08-10 12:34:09 PM  

maureen_g: lunchinlewis: What's interesting, in the basic static analysis of a problem like that, the weight of the water from the inside part of the pool is a big benefit to countering the cantilever end moment. In a practical sense though, it probably took some unusual gymnastics in the detailing, but nothing too wild.

Pretty sure you would want the engineers to calculate everything with NO water in the pool - it ain't full during construction.


The water is really, really heavy. Building some sort of balcony that hangs over the edge isn't an engineering marvel. Filling it with tons and tons of water (and then using glass on the bottom, no less) is.
 
2012-08-10 12:39:00 PM  

THX 1138: Wow. That's a LOT of weight cantilevered out there. I'm sure the architects knew what they were doing but damn, i'd be too paranoid to swim in it.


That's the part that scares me.
 
2012-08-10 12:42:03 PM  

Lucky LaRue: What kind of sick bastard hangs a pool hundreds of feet in the air and puts a transparent bottom on it?!


To me, that sounds amazing. Like the guy said, flying in the sky.

/So, the kind that's not afraid of heights. :P
 
2012-08-10 12:43:20 PM  

Crapinoleum: THX 1138: Wow. That's a LOT of weight cantilevered out there. I'm sure the architects knew what they were doing but damn, i'd be too paranoid to swim in it.

That's the part that scares me.


It's not a static load either, so that makes it worse
 
2012-08-10 12:56:20 PM  
farm2.static.flickr.com
 
2012-08-10 12:58:39 PM  

Mr Guy: JackieRabbit: since the mass of the water (at 8 lbs/gal) would be added to yours, increasing the force

Morbo says, "GRAVITY DOES NOT WORK THAT WAY".

That's true if you're concerned with the force the entire mass impacts the ground with. We're interested in the force that's being put into the body inside the mass. The only thing we need an expert on is to tell us how much the water column would spread over 240ish feet, when being preceded by a layer of tempered glass to cut down drag, and how much of the force vector is redirected outwards instead of upwards. It definitely won't matters WORSE, although depending on the coherency of the column, it could make your sudden stop quite a few feet higher than you may originally anticipate.


Yes. Coherency, that's it.

/coherent water is called "ice" ;)
//engineer
 
2012-08-10 01:04:27 PM  
What is more scary, the pool or the plane flying towards it?
 
2012-08-10 01:11:16 PM  
I swim nude. Is that OK?
 
2012-08-10 01:13:21 PM  

stuffy: I swim nude. Is that OK?


Only if you're a chick

/checks profile
//terry - insufficient data
 
2012-08-10 01:15:04 PM  
Why do I click these links and threads! Acrophobia problems here...now I feel like I need a damn xanax to calm down.

Anyone else here lose their shiat just looking at photos/images like this?
 
2012-08-10 01:29:47 PM  
Not scary until you add sharks or piranha or three year old with dubious toilet training.

/Okay, the Chinese construction gives me the heebie-jeebies.
//Fortunately, things are cheap enough there that they can just buy a new one when this breaks.
 
2012-08-10 01:30:41 PM  
you gotta join a GYM

fark that

i.telegraph.co.uk
 
2012-08-10 01:36:56 PM  

malkore: Why do I click these links and threads! Acrophobia problems here...now I feel like I need a damn xanax to calm down.

Anyone else here lose their shiat just looking at photos/images like this?


Yes. I used to get heart palpitations crossing the bridges in Thunder Bluff on WoW.

/yeah, I'm really *that* afraid of heights
 
2012-08-10 01:56:14 PM  

Gabrin_Kinoda: malkore: Why do I click these links and threads! Acrophobia problems here...now I feel like I need a damn xanax to calm down.

Anyone else here lose their shiat just looking at photos/images like this?

Yes. I used to get heart palpitations crossing the bridges in Thunder Bluff on WoW.

/yeah, I'm really *that* afraid of heights


I'd regularly jump from Shat, Dalaran, and the alliance flying ship thing, of course I was a druid, so I never had to worry about landing, but it was certainly fun.
 
2012-08-10 02:00:59 PM  

Crewmannumber6: Crapinoleum: THX 1138: Wow. That's a LOT of weight cantilevered out there. I'm sure the architects knew what they were doing but damn, i'd be too paranoid to swim in it.

That's the part that scares me.

It's not a static load either, so that makes it worse


I don't think it's really all that bad. 30x20x1.5 meters means the total water weight is 900 tons, but only about a quarter of it is actually over the edge. It will slosh around a lot, but the total shifted weight is very low- a few tons at most. I doubt you could even get much water hammer like stress on any part of the frame since the water would just slosh out.

Aquariums routinely deal with far larger water masses and more significant stresses.
 
2012-08-10 02:07:24 PM  

poe_zlaw: "toughened glass". is that kind of Engrish?


Dictionary.com: Toughened
 
2012-08-10 02:12:13 PM  

THX 1138: Wow. That's a LOT of weight cantilevered out there. I'm sure the architects knew what they were doing but damn, i'd be too paranoid to swim in it.


Being a physicist; I'm sure they used lighter water.

/not an actual physicist
 
2012-08-10 02:16:44 PM  

blatz514: Being a physicist; I'm sure they used lighter water.


butane?
 
2012-08-10 02:21:06 PM  

Headso: blatz514: Being a physicist; I'm sure they used lighter water.

butane?


Or they added helium to it.
 
2012-08-10 02:24:49 PM  
The bottom is actually transparent aluminum, so it's OK.
 
2012-08-10 02:26:41 PM  

Headso: blatz514: Being a physicist; I'm sure they used lighter water.

butane?


Butane's a bastard gas.
 
2012-08-10 02:46:11 PM  

stucka: Girion47: How is it racist to comment that the safety standards of another nation are not equal to the safety standards of the U.S.? Nationalist, maybe, but it is objective.

http://www.engineering.com/Library/ArticlesPage/tabid/85/ArticleID/4 10 /Ever-see-a-12-story-building-just-fall-over.aspx

[www.engineering.com image 480x324]


Call me crazy, but I'd build the entire structure from the bottom up, starting with that basement garage...
 
2012-08-10 03:04:14 PM  

stucka: Girion47: How is it racist to comment that the safety standards of another nation are not equal to the safety standards of the U.S.? Nationalist, maybe, but it is objective.

http://www.engineering.com/Library/ArticlesPage/tabid/85/ArticleID/4 10 /Ever-see-a-12-story-building-just-fall-over.aspx

[www.engineering.com image 480x324]


Having no need for barns, the urban Chinese Amish will be holding their apartment raising this Saturday at 8:30 am.....
 
2012-08-10 03:10:53 PM  

JackieRabbit: It would actually make matters worse, since the mass of the water (at 8 lbs/gal) would be added to yours, increasing the force with which you strike the ground. You' be pretty much a mess, but a clean one.

Remember boys and girls: physics is your friend.


It increases the force, but dissipates it simultaneously across more mass, yielding the same acceleration.
 
2012-08-10 03:11:06 PM  
Toughened glass...phhhhht.

Montgomery Scott frowns on your substandard engineering shenanigans.

www.tasmanstudios.co.nz

Transparent aluminum. That is all.

julianware.com

/ Computer...?
 
2012-08-10 03:11:35 PM  
perhaps the area under the pool should be painted like a target, that way if it were to burst the ppl could have a little fun TRYING to land in the bullseye.. ;-)
 
2012-08-10 03:13:58 PM  

FrancoFile: Well I'm sure if Steve McQueen were alive he'd have a few things to say about that.


Given his filmography, I'm sure he'd find some use for a large container of water mounted near the roof of a high-rise.

\Good for extinguishing towering infernos.
 
2012-08-10 04:22:55 PM  
Really? No pics of Singapore's new Marina Bay Sands hotel?

expertir.files.wordpress.com

mw2.google.com

i.dailymail.co.uk
 
2012-08-10 04:42:15 PM  

The Banana Thug: Really? No pics of Singapore's new Marina Bay Sands hotel?

[expertir.files.wordpress.com image 850x638]

[mw2.google.com image 500x341]

[i.dailymail.co.uk image 850x394]


That. Is. Nuts.
 
2012-08-10 04:46:28 PM  

Mose: Mr Guy: JackieRabbit: since the mass of the water (at 8 lbs/gal) would be added to yours, increasing the force

Morbo says, "GRAVITY DOES NOT WORK THAT WAY".

That's true if you're concerned with the force the entire mass impacts the ground with. We're interested in the force that's being put into the body inside the mass. The only thing we need an expert on is to tell us how much the water column would spread over 240ish feet, when being preceded by a layer of tempered glass to cut down drag, and how much of the force vector is redirected outwards instead of upwards. It definitely won't matters WORSE, although depending on the coherency of the column, it could make your sudden stop quite a few feet higher than you may originally anticipate.

Yes. Coherency, that's it.

/coherent water is called "ice" ;)
//engineer


This is actually in my obscure field of expertise. Assuming you could make the glass disappear or pulverize instantly (and tempered glass, if you did actually break it, would tend to do that - think "car window") and the water started falling as a plug, it would dissipate upward from the sides much more so than it would spread out. Surface tension would break the sides up into drops, which the passing airflow would slow down much more than the bulk in the middle. They would then depart upwards relative to the coherent plug, reducing the mass.

With enough drop distance, the water would dissipate completely, leaving your wet butt to go splat all by itself since you will fall faster than the water drops (I'll spare you the math). Since I very much doubt this is "enough drop distance", you'll still be inside a water plug of some size, and the shock wave impact described by others would apply.
 
2012-08-10 05:24:54 PM  
Engineers contributing to the thread: Thanks for sharing your expertise and doing all the math. My last (humbling) Physics class was 12th grade, where I decided to choose another career.

Acrophobics contributing to the thread: I sympathize. My thought about these dazzling bits of architecture is that "some pay for what others pay to avoid."

Chinese Building Falling Over: Simply amazing. Should they have constructed it differently, or should they not have done the underground-parkng construction as they did (or at all)? Inquiring minds want to know...
 
2012-08-10 05:31:11 PM  
I want that dream fuel.
 
2012-08-10 05:34:38 PM  

kenny's mom: Engineers contributing to the thread: Thanks for sharing your expertise and doing all the math. My last (humbling) Physics class was 12th grade, where I decided to choose another career.

Acrophobics contributing to the thread: I sympathize. My thought about these dazzling bits of architecture is that "some pay for what others pay to avoid."

Chinese Building Falling Over: Simply amazing. Should they have constructed it differently, or should they not have done the underground-parkng construction as they did (or at all)? Inquiring minds want to know...


I think it was more the "hollow" pylons that screwed them.
 
2012-08-10 06:04:59 PM  
www.oneinhundred.com
 
2012-08-10 06:18:32 PM  
Above ground pools are so white trashy
 
2012-08-10 06:26:45 PM  

Onkel Buck: Above ground pools are so white trashy


u sayinG under ground pools are BLACK trashy??
 
2012-08-10 06:43:02 PM  

carnifex2005: The Banana Thug: Really? No pics of Singapore's new Marina Bay Sands hotel?
[expertir.files.wordpress.com image 850x638]
[mw2.google.com image 500x341]
[i.dailymail.co.uk image 850x394]
That. Is. Nuts.


You wouldn't even get me on the roof of that place, let alone in the pool. .
 
2012-08-10 07:02:06 PM  
Needs more Charybdis.
 
2012-08-10 07:04:38 PM  
I could also enjoy the beautiful scenery of Pudong from here,



Do we really want to see the beutiful sights of Pudong?
 
2012-08-10 07:07:30 PM  

ChipNASA: Buttknuckle: ChipNASA: [i.imgur.com image 550x412]

Dude, is it just me or does the person in that photo have a gigantic pubic hair mound?

I had to look closely.....it's the edge/top of his/her head


No, it's their bunny trail below their belly button.
 
2012-08-10 07:48:23 PM  

Sabre Toothed Engineer:
This is actually in my obscure field of expertise. Assuming you could make the glass disappear or pulverize instantly (and tempered glass, if you did actually break it, would tend to do that - think "car window") and the water started falling as a plug, it would dissipate upward from the sides much more so than it would spread out. Surface tension would break the sides up into drops, which the passing airflow would slow down much more than the bulk in the middle. They would then depart upwards relative to the coherent plug, reducing the mass.

With enough drop distance, the water would dissipate completely, leaving your wet butt to go splat all by itself since you will fall faster than the water drops (I'll spare you the math). Since I very much doubt this is "enough drop distance", you'll still be inside a water plug of some size, and the shock wave impact described by others would apply.


Ok, first, fluid dynamics is not an obscure field of expertise, generally speaking or within mechanical engineering.

Second, you're correct in that turbulent mixing would occur at the boundary of the two fluids moving at different relative velocity. The mixing would entrain air into the water and likewise, and yes, surface tension would form droplets. I don't know why that's necessary to mention. Anyone familiar with atmospheric phenomenon called "rain" know this.

Third, you're wrong. There's no "shock wave" even if a significant volume of water is still intact by the time of impact. The impact of the water would be happening at low velocities in an compliant, energy absorbing environment (air). The momentum of the water and energy generated by the impact with the ground would mostly be dissipated into the direction change the water would experience hitting the ground. I'm familiar with pressure waves of high magnitude, since they happen in fire protection systems contained by steel piping and can do major damage to such a system.

Not so much when the water is contained by a gas of low density like air.

Further, even if there was some sort of noticeable pressure wave from the impact of the water, it certainly wouldn't affect a falling person's velocity. Water pressure exerts force equally on all surfaces of an object. What would happen is you would fall about as fast as you would through the air and hit the sidewalk at about the same impact speed. And you'd be wet.

No "shock wave." Just as there is no pressure wave sent back through a hose stream (garden hose or firefighter variety, take your pick, I've been on the nozzle of both) when it hits an object or when you dump water from a bucket. Just as there are non in any waterfalls.

What kind of engineering work do you do exactly?
 
2012-08-10 08:01:23 PM  

Headso: Now that brings up a question... If you fell 24 stories inside a pillar of water also falling 24 stories would the water break your fall at all?


It depends on the situation:

1) If the water falls into a container then you would get a decent amount of slowing from it, it would be rather like diving into that much water from that height. In theory, survivable if you do it *JUST* right. Few people survive such falls but they normally don't know what to do, nor do most of them wish to survive it anyway.

2) If the water is uncontained it's going to do you no good, it will just splash away and the only slowing will be from the fact that it doesn't happen instantly--there won't be enough water there to matter.

3) If you're not on the surface of the water when you hit it you will be hit by all that water that was behind you.

meanmutton: Headso: Now that brings up a question... If you fell 24 stories inside a pillar of water also falling 24 stories would the water break your fall at all?

No.

You're still going to accelerate to terminal velocity. I don't know what water's terminal velocity is but it's certainly not the same as yours so you'll either hit before the water does or after it'shiat and started to disperse. Either way, you're still going insanely fast and will have a very unpleasant and abrupt stop.


If you're in the water you're going to go at it's speed regardless of your terminal velocity.
 
2012-08-10 08:10:29 PM  

Jon iz teh kewl: Onkel Buck: Above ground pools are so white trashy

u sayinG under ground pools are BLACK trashy??


No. Because black folks don't swim. See
i26.photobucket.com
 
2012-08-10 08:36:15 PM  

Onkel Buck: No. Because black folks don't swim. See


cache.ohinternet.com
 
2012-08-10 09:53:05 PM  

Mose: Sabre Toothed Engineer:
This is actually in my obscure field of expertise. Assuming you could make the glass disappear or pulverize instantly (and tempered glass, if you did actually break it, would tend to do that - think "car window") and the water started falling as a plug, it would dissipate upward from the sides much more so than it would spread out. Surface tension would break the sides up into drops, which the passing airflow would slow down much more than the bulk in the middle. They would then depart upwards relative to the coherent plug, reducing the mass.

With enough drop distance, the water would dissipate completely, leaving your wet butt to go splat all by itself since you will fall faster than the water drops (I'll spare you the math). Since I very much doubt this is "enough drop distance", you'll still be inside a water plug of some size, and the shock wave impact described by others would apply.

Ok, first, fluid dynamics is not an obscure field of expertise, generally speaking or within mechanical engineering.

Second, you're correct in that turbulent mixing would occur at the boundary of the two fluids moving at different relative velocity. The mixing would entrain air into the water and likewise, and yes, surface tension would form droplets. I don't know why that's necessary to mention. Anyone familiar with atmospheric phenomenon called "rain" know this.

Third, you're wrong. There's no "shock wave" even if a significant volume of water is still intact by the time of impact. The impact of the water would be happening at low velocities in an compliant, energy absorbing environment (air). The momentum of the water and energy generated by the impact with the ground would mostly be dissipated into the direction change the water would experience hitting the ground. I'm familiar with pressure waves of high magnitude, since they happen in fire protection systems contained by steel piping and can do major damage to such a system.

Not so much when the water is contained by a gas of low density like air.

Further, even if there was some sort of noticeable pressure wave from the impact of the water, it certainly wouldn't affect a falling person's velocity. Water pressure exerts force equally on all surfaces of an object. What would happen is you would fall about as fast as you would through the air and hit the sidewalk at about the same impact speed. And you'd be wet.

No "shock wave." Just as there is no pressure wave sent back through a hose stream (garden hose or firefighter variety, take your pick, I've been on the nozzle of both) when it hits an object or when you dump water from a bucket. Just as there are non in any waterfalls.

What kind of engineering work do you do exactly?


Sorry, I referring to the third point I should have been more explicit. I was assuming that a large volume of water remained intact, so that the mass would contain, or restrict at least, the relief of pressure to the sides. You would experience a shock wave, although nothing remotely like water hammer where the volume was contained. Everything you've said is correct in the context you presented it.

I've been designing equipment for the pulp and paper industry for about 35 years. You and I are talking about something the average guy (in my experience) understands very poorly, and I was trying to simplify it for the masses. I think that if you and I were talking face to face, we'd find nothing to disagree about. And, no, fluid mechanics is hardly obscure, but what I do specifically is. And almost never relevant to day to day life.
 
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