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-   -   CHICAGO | Cirrus & Cascade (LSE) | 562' & 403' FT | 52 & 37 FLOORS (https://skyscraperpage.com/forum/showthread.php?t=239946)

bnk Nov 15, 2019 4:29 PM

What's going on here? There is nothing permanent about this.


LouisVanDerWright Nov 15, 2019 4:40 PM

Quote:

Originally Posted by bnk (Post 8749484)
What's going on here? There is nothing permanent about this.

What do you mean? They are building the climbing form assembly for the core. This is totally temporary and features reusable forms that open and close to allow workers inside to place the rebar before closing back up and being filled with concrete.

bnk Nov 15, 2019 4:46 PM

Quote:

Originally Posted by LouisVanDerWright (Post 8749506)
What do you mean? They are building the climbing form assembly for the core. This is totally temporary and features reusable forms that open and close to allow workers inside to place the rebar before closing back up and being filled with concrete.

Thank you. I knew it was temporary I just didn't know its function. Now I do.

Skyguy_7 Nov 15, 2019 7:44 PM

^Understandable. Looks permanent because the formwork is shiny and new. Typically, they're orange and rusty but the problem is that GCs don't have any old ones lying around in their equipment yards thanks to the most tremendous construction boom in Chicago history! They're all spoken for! :cheers:

bhawk66 Nov 15, 2019 9:58 PM

So much respect for these construction workers. Not only do they work in dangerous and precarious situations, now it's the weather. The guy above is doing something with that 2x4 while balancing on minimal foot support all while carrying a cumbersome tool belt and safety harness. :worship:

SolarWind Nov 17, 2019 8:44 AM

November 15, 2019














cozy Nov 17, 2019 3:25 PM

awesome pics. can't wait to watch these two massive elevator cores rise above LSD

KWillChicago Nov 17, 2019 11:00 PM

Because of the three cranes working together do the two towers have to rise simultaneously level for level?

Bombardier Nov 17, 2019 11:42 PM

Quote:

Originally Posted by KWillChicago (Post 8751251)
Because of the three cranes working together do the two towers have to rise simultaneously level for level?

Since all 3 cranes are luffers, they have a lot of flexibility. I would expect that we will always see the taller one jump first and the medium one jump second. The towers should rise roughly floor for floor once the climbing cores are both built (barring unforeseen issues). The small crane is probably at it's ultimate height since it is only there for a short time to support the podium.

harryc Nov 18, 2019 4:09 AM

Nov 15












harryc Nov 23, 2019 1:10 PM

Nov 20

















KWillChicago Nov 23, 2019 2:19 PM

How cool would it be if both buildings shared the same slab for each floor. That would be so huge taking up the whole site and fun to watch.

bhawk66 Nov 23, 2019 4:48 PM

Wow. Stellar shots, Harry. Gracias

BVictor1 Nov 23, 2019 8:57 PM

Quote:

Originally Posted by SolarWind (Post 8750905)
November 15, 2019


Is that a big ass crack in the concrete?

bhawk66 Nov 24, 2019 1:00 AM

Thank god for rebar.

Tensile. Should be fine.

harryc Nov 24, 2019 1:55 AM

Quote:

Originally Posted by BVictor1 (Post 8757154)
Is that a big ass crack in the concrete?

More likely some squeezed between the forms - which would be joined right here.

harryc Nov 28, 2019 3:02 PM

Nov 27

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

rivernorthlurker Nov 30, 2019 2:38 AM

Quote:

Originally Posted by harryc (Post 8761549)
Nov 27

At the rate that they're going I feel like this is almost finished, lol. They literally broke ground 13 weeks ago.

Hourstrooper Nov 30, 2019 2:57 AM

Quote:

Originally Posted by rivernorthlurker (Post 8762848)
At the rate that they're going I feel like this is almost finished, lol. They literally broke ground 13 weeks ago.

Its good for the haste!!!! get these infill towers built so that the larger site I can commence!!!

rivernorthlurker Nov 30, 2019 3:03 AM

Quote:

Originally Posted by Hourstrooper (Post 8762859)
Its good for the haste!!!! get these infill towers built so that the larger site I can commence!!!

Haha, my thoughts exactly. If feel like these two towers are basically part of Site I's construction in that sense.

SolarWind Dec 4, 2019 4:32 AM

December 3, 2019








Donnie77 Dec 4, 2019 6:41 AM

looks like Navy Pier is finally getting its glass!

harryc Dec 6, 2019 4:00 AM

Dec 4

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

SolarWind Dec 9, 2019 4:19 AM

December 3, 2019





December 7, 2019


KWillChicago Dec 9, 2019 12:57 PM

Such a much needed gap filler from that last view. I just hope site I doesnt get a height chop.

cozy Dec 10, 2019 3:40 PM

A couple sick photos from @suicide.shots

https://i.imgur.com/nHpuf1dh.jpg

https://i.imgur.com/NBKNbWBh.jpg

harryc Dec 15, 2019 2:51 AM

Dec 11

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Climbing form
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Under construction
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Post Tension
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

SolarWind Dec 23, 2019 3:15 AM

December 17, 2019














Blahshead Dec 24, 2019 3:46 AM

Honest question -- why is it these towers seem to be rising so much faster than One Chicago, which started earlier?

maru2501 Dec 24, 2019 4:10 AM

they are smaller

KWillChicago Dec 24, 2019 4:37 AM

Thats going to be such a massive mat pour when the two are connected.

Bombardier Dec 24, 2019 3:41 PM

Quote:

Originally Posted by Blahshead (Post 8783733)
Honest question -- why is it these towers seem to be rising so much faster than One Chicago, which started earlier?

At one Chicago, the contractor installed a secant wall around the entire city block and excavated the entire site 15'-20' below grade. They also dug cores down 50' below grade with complex cofferdams before starting to come up. The underground construction of One Chicago is orders of magnitude more complex.

cozy Dec 24, 2019 6:13 PM

exciting to see it already rising

harryc Dec 24, 2019 10:03 PM

Quote:

Originally Posted by Blahshead (Post 8783733)
Honest question -- why is it these towers seem to be rising so much faster than One Chicago, which started earlier?

One Chicago needs to go down before it goes up, this one starts at grade.

harryc Dec 24, 2019 10:05 PM

Quote:

Originally Posted by KWillChicago (Post 8783767)
Thats going to be such a massive mat pour when the two are connected.

the floor plates are already being done in sections. The mat pours were done a month or so ago.

Oct 16 2019

Form work going up for the mat.

Blahshead Dec 25, 2019 2:54 AM

Quote:

Originally Posted by maru2501 (Post 8783748)
they are smaller

Quote:

Originally Posted by harryc (Post 8784222)
One Chicago needs to go down before it goes up, this one starts at grade.

Quote:

Originally Posted by Bombardier (Post 8784002)
At one Chicago, the contractor installed a secant wall around the entire city block and excavated the entire site 15'-20' below grade. They also dug cores down 50' below grade with complex cofferdams before starting to come up. The underground construction of One Chicago is orders of magnitude more complex.


Thanks! Exciting the buildings have different timelines--we'll get to see some cool construction for quite a while.

harryc Dec 25, 2019 4:17 AM

Quote:

Originally Posted by Blahshead (Post 8784310)
Thanks! Exciting the buildings have different timelines--we'll get to see some cool construction for quite a while.

These look to be 2 very standard residential towers - with a shared large podium. This will be a great contrast to One Chicago which has secant walls, top down construction, and many levels of underground parking - next to an active subway station.

KWillChicago Dec 25, 2019 10:37 AM

My bad Harry. I meant the floor plates stretching across the whole site for the big ass podium. Am I right in thinking the floor plates are going to be even for majority of both buildings throughout the podium? Possibly the towers as well?

cozy Dec 25, 2019 4:15 PM

Quote:

Originally Posted by KWillChicago (Post 8784403)
My bad Harry. I meant the floor plates stretching across the whole site for the big ass podium. Am I right in thinking the floor plates are going to be even for majority of both buildings throughout the podium? Possibly the towers as well?

Ah, yeah you are right but they stagger the work they wouldn't pour an entire floor at once

Watch this starting at 5:13: (Extreme Engineering) Build It Bigger - High Risk Tower (S02E10).mp4

harryc Dec 26, 2019 1:22 AM

Dec 20














KWillChicago Dec 26, 2019 4:03 AM

Quote:

Originally Posted by cozy (Post 8784472)
Ah, yeah you are right but they stagger the work they wouldn't pour an entire floor at once

Watch this starting at 5:13: (Extreme Engineering) Build It Bigger - High Risk Tower (S02E10).mp4

Thanks Cozy. I love when you guys post informative videos for us novice scraper lovers.

cozy Dec 26, 2019 4:30 AM

Quote:

Originally Posted by KWillChicago (Post 8784709)
Thanks Cozy. I love when you guys post informative videos for us novice scraper lovers.

My pleasure. I'm learning alongside the rest of you :cheers:

I developed an understanding of staggered construction watching Vista tower go up. Talk about massive floor plates.

As I was typing out an explanation I remembered that scene in Trump Tower Build It Bigger, I love those construction docs. Was a better use of my time to link you to it :tup:

gandalf612 Dec 26, 2019 4:53 PM

This site is definitely worth seeing in person, esp. since you get since a nice view from above

December 24, 2019
https://live.staticflickr.com/65535/...9aa18f85_b.jpg

cozy Dec 26, 2019 5:39 PM

Quote:

Originally Posted by gandalf612 (Post 8784878)
esp. since you get since a nice view from above

Not for long :haha:

KWillChicago Dec 26, 2019 10:51 PM

Is that the max height for the short crane?

Bombardier Dec 27, 2019 12:40 AM

Quote:

Originally Posted by KWillChicago (Post 8785047)
Is that the max height for the short crane?

You have to assume that it is. Jumping a crane is expensive so they would have set that crane to its ultimate height when it was originally set up. It is only servicing the podium not either of the towers, so I think that is all the higher it is going.

harryc Dec 28, 2019 4:06 PM

Dec 27

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Note the termination of the post tension tendons in the lower right.
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr


Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

harryc Dec 28, 2019 4:30 PM

Climbing Forms
 
This site give excellent views of the climbing forms

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

A roomy gallery to work in - and a dedicated pad for crane deliveries.
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Outer forms pulled away
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

The top of the core just after the forms have been raised.
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

The rollers that the outer part of the form hangs on.
Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

Chicago | Cirrus and Cascade by Harry Carmichael, on Flickr

rivernorthlurker Dec 28, 2019 10:53 PM

Quote:

Originally Posted by harryc (Post 8751449)
Nov 15


Construction question: In the pic above, why is some of the rebar coated and some is not?

harryc Dec 28, 2019 11:54 PM

Quote:

Originally Posted by rivernorthlurker (Post 8786196)
Construction question: In the pic above, why is some of the rebar coated and some is not?

Generally the vinyl coated rebar is used in parking garages and other areas where heavy salt use is expected.


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