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  #121  
Old Posted Dec 12, 2019, 12:34 AM
RED_PDXer RED_PDXer is offline
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Rainier Square: A faster way to build tall

I came across this article and was amazed at how quick this tower went up.

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The thought of constructing a tower core without rebar would cause many builders to scoff.

But the project team behind a 58-story tower under construction in Seattle is working to prove that there may be a better, faster way to build tall.

Seattle-based engineering firm Magnusson Klemencic Associates (MKA) has pioneered a new type of high-rise building core that utilizes a concrete-filled composite plate shear wall system called SpeedCore. The system was used for the first time on Rainier Square, an 850-foot-tall mixed-use tower being built by general contractor Lease Crutcher Lewis.

The building was designed by NBBJ for Seattle-based developer Wright Runstad & Company.

Because the concept was utilized for the first time on such a high-profile project, there are a lot of eyes on the work being done....

The SpeedCore concept was actually borrowed from methodology used around the world to construct nuclear power stations, Morgen said.

“The loading is entirely different with blast and projectile,” he said. “You have thick walls for out-of-plane loading, while for tall buildings we’re using the same concept in a completely different manner. Extrapolating it to Rainier Square was the first real world application when it comes to high rises.”

So how does it work?

Because concrete in a building core is normally poured days or even weeks before structural steel is erected on the same level, the leading core method leads to completion of the building core long before the rest of the building catches up.

By contrast, erection of a SpeedCore structure begins with prefabricated panels consisting of two structural steel plates held in place with cross-connecting tie rods. After erection, the panels are filled with concrete, which is poured from the bottom of the panel. The resulting sandwich provides strength and stability along with significant on-site time savings.

It does away with the need for curing time entirely by eliminating the need for a leading core. Also, it eliminates the need for formwork, installation of rebar, embedded plates, sleeves and block-outs.

“In SpeedCore you could do two floors in one week,” Morgen said. “Now, what you’re doing is trading prefab time offsite to achieve that; that does have lead time associated with it.”

And now the involved firms know the concept works as intended.

The Rainier Square project topped out after just 10 months, achieving a construction rate of roughly 1.35 floors per week. The system has shorted the timeline of the project, which is slated for completion in March 2020, from 40 months to 31 months.
Full article (behind pay wall)
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  #122  
Old Posted Jan 5, 2020, 9:25 PM
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chris08876 chris08876 is offline
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This has a great impact on the skyline. Looks like the glass is topped out.




DSC03469 by aroubin - thanks for 1 MILLION views!, on Flickr
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  #123  
Old Posted Jan 5, 2020, 11:13 PM
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Originally Posted by chris08876 View Post
What a shot
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  #124  
Old Posted Jan 5, 2020, 11:46 PM
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^ Looks almost as tall as the Columbia Center.
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  #125  
Old Posted Jan 7, 2020, 5:45 AM
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Gotta love Seattle's skyline.
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  #126  
Old Posted Apr 26, 2020, 1:04 AM
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A few days old, but here is a photo I took of it while stuck out in West Seattle.



It's definitely cool.

Edit: Sorry for the low resolution.

Last edited by SFBruin; Apr 27, 2020 at 9:25 PM.
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  #127  
Old Posted Apr 27, 2020, 3:19 PM
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^ Still a great shot. Gotta love this building and it's effect on the skyline. Now if we could only get a 700-800-footer in the Denny Triangle area, it would give you a three-peak skyline from that vantage point.
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  #128  
Old Posted Apr 27, 2020, 9:27 PM
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I always thought that Seattle needed a tower south of the Columbia Center, but I get that there are flight-based restrictions to that.
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  #129  
Old Posted Apr 28, 2020, 12:42 AM
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This is easily one of my favorite skyscrapers rising in the US right now, good for Seattle

Is it all office or partly residences?
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  #130  
Old Posted Apr 28, 2020, 2:31 AM
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That is such a great skyline and setting.
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  #131  
Old Posted Jul 17, 2020, 11:53 AM
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A picture I took of the skyline yesterday.

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  #132  
Old Posted Jul 17, 2020, 1:45 PM
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Quote:
Originally Posted by Zapatan View Post
This is easily one of my favorite skyscrapers rising in the US right now
It seems to be the second tallest skyscraper under construction outside NYC and Chicago, beating Austin's 6 X Guadalupe by 1 foot.

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Is it all office or partly residences?
According to https://www.ctbuh.org/news/seattle82...quare-tops-out , it "features offices, retail spaces, and residential units".

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Originally Posted by colemonkee View Post
Gotta love this building and it's effect on the skyline.
Agreed. It balances Columbia Center well.

Last edited by pianowizard; Jul 17, 2020 at 1:57 PM.
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  #133  
Old Posted Jul 31, 2020, 5:04 AM
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7/30/2020 Fly Up from NE Side:

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  #134  
Old Posted Aug 23, 2020, 8:42 AM
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Here is an image I took of the tower from a different angle than it is normally seen.

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  #135  
Old Posted Aug 31, 2020, 9:52 PM
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It looks like the glass is finished.

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