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Old March 13th, 2009, 08:43 PM   #1
The other Dude
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Vertical Expansions

I dont think there aleady is a thead with that topic.

Im really fascinated by the idea of vertical expansions / buildings on top of existing buildings, so Im starting this thread.
Its supposed to become kind of a collection of existing projects/buildings and a place to discuss.
Since I dont know many projects, I hope you guys can help me out and post some. They dont necessary have to be very tall ;-)

Thx
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Old March 17th, 2009, 06:00 AM   #2
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Well, to start this thread off, there is the Blue Cross-Blue Shield Tower expansion in Chicago and the Bentall 5 skyscraper in Vancouver was constructed in two phases.
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Old March 17th, 2009, 08:20 PM   #3
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A few from Tallinn, Estonia:





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Old March 20th, 2009, 06:46 AM   #4
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AWESOME!
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Old March 20th, 2009, 10:18 AM   #5
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155 Cumberland: high end condo addition to existing building in Yorkville, Toronto

Couresy of KGB

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Courtesy of urbandreamer

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Old March 20th, 2009, 12:45 PM   #6
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Axa Tower, Paris - La Dèfense:



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Old March 20th, 2009, 05:17 PM   #7
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An example in Singapore. The owner built an apartment block but retained a conservation mansion. As the plot was small the tower was built over the mansion.





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Old March 21st, 2009, 12:27 AM   #8
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i really like the idea. preserving the old and yet being progressive.
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Old March 21st, 2009, 04:36 PM   #9
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Progress should go hand in hand with conservation and ideally, neither should be at the expense of the other.

Another example of a modern extension straddling a historical mansion.

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Old March 27th, 2009, 08:15 PM   #10
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Peninsula Hotel, Hong Kong



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Old September 14th, 2009, 09:38 AM   #11
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There is another thread here in SSC which is related to this subject. It is about old building bases with a modern glass tower above it.
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Old March 5th, 2010, 11:47 AM   #12
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The new skyscraper in London, 25 Churchill Place, shoiuld have been designed to have a vertical expansion to match One Churchill Place (though it actually does not).
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Old March 5th, 2010, 08:06 PM   #13
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Chicago BCBS had a recent vertical expansion:
Thread:http://www.skyscrapercity.com/showthread.php?t=545326

Before:


During:




After:



Compare the height of the building to the right as a point of reference to see how much was added.....
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Old March 5th, 2010, 08:18 PM   #14
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^They doubled the height without strengthening the old tower? That old tower should have an incredible strong steel structure.
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Old March 5th, 2010, 10:18 PM   #15
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The tower in its original form can support the recently-added floors. Also, how can a building's skeleton be strengthened for an expansion, anyway?
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Old March 6th, 2010, 04:50 AM   #16
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that BCBS expansion in Chicago is beautiful! I never would have even guessed that the two halves were built at different times.

edit: although, I did notice that you can actually see the difference in cladding

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Old March 6th, 2010, 04:52 AM   #17
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Quote:
Originally Posted by Ramses View Post
^They doubled the height without strengthening the old tower? That old tower should have an incredible strong steel structure.
It was originally designed for a future expansion.
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Old March 6th, 2010, 04:57 AM   #18
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Although still U/C and this is just a render, it is beautiful.

Elbe Philharmonic Hall, Hamburg, Germany
[IMG]http://i49.************/1zou80h.jpg[/IMG]
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Old March 6th, 2010, 04:57 AM   #19
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Quote:
Originally Posted by Jim856796 View Post
The tower in its original form can support the recently-added floors. Also, how can a building's skeleton be strengthened for an expansion, anyway?
Many ways dude!
Perhaps with steel reinforcements in the main pillars . . .
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Old March 6th, 2010, 05:11 AM   #20
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Quote:
Originally Posted by philvia View Post
that BCBS expansion in Chicago is beautiful! I never would have even guessed that the two halves were built at different times.

edit: although, I did notice that you can actually see the difference in cladding
Yeah, unfortunately that was unavoidable. However, the cladding was all of the same materials, so with luck, as the building ages they will blend to the same tones and it will look seamless...
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