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Old September 14th, 2011, 01:04 PM   #8561
Nordschleife
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Old September 14th, 2011, 01:06 PM   #8562
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LuJiaZui looks gorgeous, I think the best skyline of the world
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Old September 14th, 2011, 02:21 PM   #8563
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Quote:
Originally Posted by GOL2007 View Post
Looks like the super columns are getting covered with concrete. Thought it would stay only steel... with concrete better fire protection though...
Well, they should give it concrete. Standard fireproofing is not enough as 9/11 has proven. Though I think in modern buildings the core is the main power house, not the perimeter columns
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Old September 14th, 2011, 04:05 PM   #8564
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Chinese steel can withstand fire, as all steels. Except for American one, apparently.
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Old September 14th, 2011, 06:00 PM   #8565
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Quote:
Originally Posted by krkseg1ops View Post
Chinese steel can withstand fire, as all steels. Except for American one, apparently.
LOLWUT? Anyway, good to see progress on this building. I like how the exterior columns are even more ridiculously huge now that they have concrete around them.
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Old September 14th, 2011, 06:07 PM   #8566
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krkseg1ops wrote:
Quote:
Chinese steel can withstand fire, as all steels. Except for American one, apparently.
That's a ridiculous and rather insensitive statement. The physical characteristics of steel are the same everywhere and have nothing to do with nationality. There are variations in the methods in which it is manufactured such as adding more carbon content to gain additional strength but steel doesn't necessarily have to melt to cause a disaster. It just has to become somewhat pliable which will occur at about 1000F when it loses it's structural integrity.
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Old September 14th, 2011, 06:16 PM   #8567
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Stunning updates !!! It has increased its growing speed, thats cool !
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Old September 14th, 2011, 07:27 PM   #8568
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Quote:
Originally Posted by krkseg1ops View Post
Chinese steel can withstand fire, as all steels. Except for American one, apparently.
LOL
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Old September 15th, 2011, 04:23 AM   #8569
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Kanto and MontanaGuy, you're both right. The towers just happened to have a structural design that no other buildings really have, and all steel tends to warp under such enormously high temperatures.

I probably shouldn't be encouraging us to go off topic, but I have to admit I find the physics behind 9/11 to be fascinating.
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Old September 15th, 2011, 04:38 AM   #8570
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Old September 15th, 2011, 05:28 AM   #8571
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Old September 15th, 2011, 05:46 AM   #8572
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Hi all.

Quote:
Originally Posted by Kanto View Post
Well, they should give it concrete. Standard fireproofing is not enough as 9/11 has proven. Though I think in modern buildings the core is the main power house, not the perimeter columns
Hi Kanto.
I agree the core is the majority of the structural strength in modern buildings. For this project and others like PingAn IFC the giant supercolumns add alot of strength as well.

Quote:
Originally Posted by drew.magoo View Post
Kanto and MontanaGuy, you're both right. The towers just happened to have a structural design that no other buildings really have, and all steel tends to warp under such enormously high temperatures.

I probably shouldn't be encouraging us to go off topic, but I have to admit I find the physics behind 9/11 to be fascinating.
Hi Drew.
I encourage you (as an interested enthusiast) and others to read the FEMA WTC building performance study and the NIST WTC investigation. Both are volumous reads on 9/11.

Back on topic.
The forms have jumped another level on the core. We should see the next double level columns up soon - for levels 33 and 34.


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Old September 15th, 2011, 06:11 AM   #8573
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How tall is it now? It seems short but that is probably due to the sheer size of the base.

Time for a diagram update?
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Old September 15th, 2011, 09:25 AM   #8574
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Old September 15th, 2011, 01:23 PM   #8575
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Old September 15th, 2011, 02:42 PM   #8576
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cant wait for the second belt truss
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Old September 15th, 2011, 04:03 PM   #8577
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Old September 15th, 2011, 04:07 PM   #8578
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Thanks for all the updates! going up fast!!!
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Old September 15th, 2011, 04:36 PM   #8579
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Old September 15th, 2011, 08:14 PM   #8580
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