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Old November 16th, 2006, 06:33 AM   #1
cokedrinker
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Slenderness ratios - How high can you go

Hello,

Im an architecture student beginning to design a skyscraper for my final year project. I was wondering what is considered the maximum slenderness ratio for skyscrapers. I've been reading that 12:1, was considered the upper limit, but that book is quite dated by now. Trump tower at 11:1 is one of the bigger slenderness ratios i have come across so far.

Cheers!
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Old November 16th, 2006, 11:14 AM   #2
malec
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What about this in Hong Kong?

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Old December 23rd, 2006, 05:08 AM   #3
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Quote:
Originally Posted by cokedrinker View Post
Hello,

Im an architecture student beginning to design a skyscraper for my final year project. I was wondering what is considered the maximum slenderness ratio for skyscrapers. I've been reading that 12:1, was considered the upper limit, but that book is quite dated by now. Trump tower at 11:1 is one of the bigger slenderness ratios i have come across so far.

Cheers!
you should look at the Burj Dubai, it's a 808+ meter building under construction that's Very slender.
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Old December 23rd, 2006, 07:10 AM   #4
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1 Moulmein Rise, 27 floors condominium tower, Singapore




Slender ratio 8:15, Newton Gems, Singapore. 30 floors condominium towers.
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Old December 23rd, 2006, 08:33 AM   #5
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Highcliff and Summit, Hong Kong





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Old December 23rd, 2006, 10:11 PM   #6
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One King West in Toronto, 51 floors and 176m tall. 11:1



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Old December 23rd, 2006, 10:55 PM   #7
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can't see the pics
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Old March 20th, 2007, 07:42 PM   #8
cokedrinker
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Does anyone know what the slenderness ratio of the High Cliff, HK is? Can't seem to find it
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Old March 20th, 2007, 08:28 PM   #9
cokedrinker
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well i came across a typical floor plan here with external dimensions http://www.highcliff.com.hk/pdf/36-56f.pdf

Which dimension should be taken as the slender side of the building? The minor axis of one ellipse, OR the width of the building through where both ellipses intersect (which contains the circulation core), OR other?

Takin the minor axis of one ellipse 13.32m, gives a slenderness ratio of almost 19:1. Takin both ellipses into account and a width of approx 20m gives a slenderness ratio of about 12.5:1.

In my opinion it should be the latter, 12.5:1. What do you all think?
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Old March 22nd, 2007, 01:55 PM   #10
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I'd take the 19 to 1 as the ratio, which is incredible!! Averaging them doesn't really apply because the difficulty is to get something that narrow to resist wind loads etc. in that direction- in fact a long thin building is working harder 'cos you have a huge wind load and only a really small width to control those forces.
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