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Chinese Firms Claims It Can Build World's Tallest Tower in 90 Days
An anonymous reader writes "Even since the current world's tallest builing — the Burj Khalifa in Dubai — was completed, there has been a constant battle to build the world's next tallest building. The current record holder stands tall at 828 meters and took five years to build, but a Chinese company called Broad Sustainable Building aims to smash that record by building the 838 meter Sky City tower, in Changsa, China in a mere 90 days. BSB plans to use prefab building techniques to construct the tower in record time."
Absolutely nothing can go wrong....
If you pre-fab everything on the ground then its not really "building", more like "assembling".
I run: Windows, OS X, Linux, FreeBSD. Just because you have a hammer, doesn't mean everything is a nail.
While it may have taken more than 90 days to build the Empire State Building, the same pre-fab techniques such as off-site fabrication and on-site assembly were used to build that monument to the American spirit.
Everyone scoffs at the Chinese when they boast like this, but there really isn't any particular problem with what they are proposing. Given enough lead time and sufficient raw materials, they should be able to assemble a world-record building in the timeframe specified. Naturally, some leeway may be necessary to account for weather, but other than that, good luck to them.
As a structural engineer, I do not doubt at all that they are able, or anyone for that matter, to put together a prefab tower in 90 days. This is no big deal. For example, in bridge projects it's a terribly common thing to put together temporary structures assembled from tubular steel bars which are about 10-story tall, and there are pre-fabricated steel beams being marketed for this sort of temporary work which are about 20 or 24 meters tall.
And the only reason that these temp structures aren't taller is because in bridge works after about 20 meters the valleys tend to be wide enough so that it tends to be more economical to use other building techniques, such as incremental launch.
What I doubt is that this type of tower is economical or capable of handling the design loads for a specific region. After a certain scale, there are significant economical advantages to be had by optimizing structural elements, particular in steel structures, and "one size fits all" make it impossible to take advantage of this. Moreover, there isn't exactly a lot of demand for temporary skyscrappers. Even in cases where a catastrophy raises the need for temporary housing and infrastructure, you don't need a 1km-tall structure to sort things out.
My main concern is quality assessment and safety. If you are going to build a extremelly specialized and optimized structure intended to house tens of thousands people, you simply cannot rush things or cut corners on safety checks. If some bolts aren't screwed adequately, a lot of people can die. A couple of months ago there was a report on a chinese bridge being inaugurated while its safety railings weren't even bolted to the structure, which has been pointed out by a chinese engineer working on the project. If this sort of rush job is done with such a large structure, we have a calamity waiting to happen.
You are asking the wrong questions. It's a cultural thing but if you ask a question that can be answered with "yes", that's all you're going to hear. You need to ask open questions. Instead of "is it going to be done on time?, ask "how far have you gotten?" and so forth. Even then it's not guaranteed that you'll get all the info you were looking for.
Beta is broken and the link to classic doesn't work. Stop wasting our time or there won't be anybody left here.
Of-course, China has much freer market than almost anybody else on the planet, all the businesses that are there, all the people, who moved their investment capital there, all the companies that produce there, you think they are there because China is communist? China is a communist like I am a ballerina.
Also, China to USA is what Germany is to Greece, except Greece cannot print money and USA can, but the rest of the relationship is the same, USA needs China much more than China needs USA. Here is one of debates on this, the people in the audience don't understand it and don't want to hear about it (no surprise, so many are Chinese expatriates)
You can't handle the truth.
From what I know about skyscraper construction, the biggest challenge will be access to the site. There is just so much material that needs to be delivered to put up a building of that height at that pace, even if prefabricated.
I'm aware they built a hotel in 15 days, but this building is about 300x times larger by mass and they are only giving themselves 6x more time. This means they have to work at a 50x rate as compared to the previous project.
Conclusion: color me doubtful.