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Chinese builder puts up 57-story skyscraper in 19 days
seattletimes. ^ | April 30, 2015 | PENG PENG DIDI TANG

Posted on 05/01/2015 8:09:54 AM PDT by JoeProBono

CHANGSHA, China (AP) — A Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China.

The Broad Sustainable Building Co. put up the rectangular, glass-and-steel Mini Sky City in the Hunan provincial capital of Changsha using a modular method, assembling three floors per day, company vice president Xiao Changgeng said.

(Excerpt) Read more at seattletimes.com ...


TOPICS: Chit/Chat
KEYWORDS: china; engineering; skyscraper
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To: Gaffer
"automatic knee jerk reactions ... China builds cheap crap." You may be right. I searched "Chinese building topples' and came up with a number of photos of attractive women not wearing brassieres, to wit: Chinese building topples photo: topples Hollywood_22.jpg
21 posted on 05/01/2015 8:35:33 AM PDT by tumblindice (America's founding fathers: all armed conservatives.)
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To: Gaffer

Compressive strength of concrete over cure time

22 posted on 05/01/2015 8:45:05 AM PDT by Covenantor ("Men are ruled...by liars who refuse them news, and by fools wnho cannot govern." Chesterton)
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To: JoeProBono

Another zombie building. Just what the Butchers of Beijing need.


23 posted on 05/01/2015 8:55:30 AM PDT by E. Pluribus Unum (If Obama speaks and there is no one there to hear it, is it still a lie?)
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To: Covenantor

And how does that apply to support requirements of said concrete when it isn’t a support factor in the overall steel structure of the building.

I get what this graph implies, but how does the curing time of a section of concrete poured in an assembly factory beforehand and installed into a steel structure affect integrity of the structure stand as a whole as long as the cure time for days cured meets engineering requirements. The weight of it, cured or uncured, is still relatively still there. Seems to me curing and moisture conditions are much more controllable in an enclosed environment, and I can personally attest that curing in a hot zero moisture environment isn’t good. In my case it eventually became crumbling rotten concrete.

From everything I could see was that everything was preformed/poured and set before transport to assembly with the exception of weld/rivet work on the steel cross bracing. As long as it isn’t required to withstand full test/cure loads after a given time after completion, how does this graph change things?


24 posted on 05/01/2015 9:04:00 AM PDT by Gaffer
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To: tumblindice

I think I was gonna reply to you but I was transfixed on the headlights.


25 posted on 05/01/2015 9:05:08 AM PDT by Gaffer
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To: JoeProBono

Kaise Yard #2 in California built the Liberty ship Robert E. Peary in 4 days 15 hours and 29 minutes in 1942.


26 posted on 05/01/2015 9:16:21 AM PDT by Rockpile
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To: tumblindice

That’s a woman? She has a bad case of man-legs.


27 posted on 05/01/2015 9:24:17 AM PDT by sparklite2
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To: JoeProBono

Why stop at 57?


28 posted on 05/01/2015 9:41:42 AM PDT by Chad_the_Impaler
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To: JoeProBono

I want to know how many spare parts they had.


29 posted on 05/01/2015 9:46:21 AM PDT by Idaho_Cowboy (Ride for the Brand. Joshua 24:15)
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To: tumblindice

The computer thought you meant “topless” perhaps?


30 posted on 05/01/2015 10:02:33 AM PDT by married21 ( As for me and my house, we will serve the Lord.)
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To: cripplecreek

Is it earthquake resistant?


31 posted on 05/01/2015 10:25:57 AM PDT by Parmy
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To: JoeProBono
A lot like this
32 posted on 05/01/2015 10:27:42 AM PDT by bmwcyle (People who do not study history are destine to believe really ignorant statements.)
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To: JoeProBono

What does the foundation look like? Was it done before the ground became rain soaked as the pic shows?


33 posted on 05/01/2015 10:39:51 AM PDT by wrench
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To: Gaffer

I jumped the gun on this after only watching the time lapse video.

The Telegraph UK photo gallery provides scant text information but the photos reveal quite a bit more.

From these it appears that floors are composite slabs on box trusses of some sort assembled off-site. From the video. only the pre-fab exterior wall sections are apparent, but that’s time lapse video for you.

The structure has been substantially reduced from the original mammoth and highly boastful proposal. Broad criticism from structural engineers indicated that the original design ignored the wind loads involved in super high rise buildings not to mention the stiffness required for pr statement that the design would resist scale 9 earthquakes. Apparently the design/contract firm hired the noted Arup Engineering firm to do the structural analysis resulting in the new Mini-Sky project in the AP pr release. Which by the way seems to be the source for almost all the news about this building.

Looking forward to reading western engineering reviews of the process.

http://www.telegraph.co.uk/news/picturegalleries/worldnews/11485389/Chinese-company-builds-57-storey-skyscraper-in-19-days-in-pictures.html?frame=3239531

As a side note, I watched the collapse of a portion of the Crystal City project from our design office window, circa 1967. The developer had been bragging to the press of the speed of construction just days before. I remain sceptical of such speed claims.


34 posted on 05/01/2015 10:41:59 AM PDT by Covenantor ("Men are ruled...by liars who refuse them news, and by fools wnho cannot govern." Chesterton)
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To: JoeProBono

Shanghai--2009

35 posted on 05/01/2015 10:48:13 AM PDT by BerryDingle (I know how to deal with communists, I still wear their scars on my back from Hollywood-Ronald Reagan)
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To: BerryDingle

Just me, but I’d tend to want to have a foundation for a high rise a bit deeper than 1-2 feet.


36 posted on 05/01/2015 10:51:18 AM PDT by fieldmarshaldj (Resist We Much)
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To: Fresh Wind

Thanks!! That is the picture I was thinking of.


37 posted on 05/01/2015 11:18:59 AM PDT by TexasRepublic (Socialism is the gospel of envy and the religion of thieves)
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To: tumblindice

That’s Japanese.


38 posted on 05/01/2015 11:21:26 AM PDT by __rvx86 (Ted Cruz: Proving that conservative populism is a winning strategy. GO CRUZ!)
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To: JoeProBono

Bribes will usually go a long way in getting rid of troublesome things like building permits and government safety inspections.


39 posted on 05/01/2015 12:50:42 PM PDT by Hawthorn
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To: wrench

>> What does the foundation look like? <<

Are you referring to post no. 21? I don’t see any evidence of a foundation.


40 posted on 05/01/2015 12:55:31 PM PDT by Hawthorn
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