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  #2521  
Old Posted Nov 24, 2020, 2:29 AM
Ravenswood Ravenswood is offline
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In Chicago, residential high-rises are mostly reinforced concrete but office towers are mostly steel-framed.

Why is this so?

It’s not always the case. For example, 311 S. Wacker is a concrete office building. But it seems to be a general rule.

Some have suggested that concrete deadens noise better. But I’ve lived in concrete high-rises that are still plenty loud. I’ve also heard that steel offers larger floor plates for office uses.

Thoughts?
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  #2522  
Old Posted Nov 24, 2020, 2:31 AM
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Quote:
Originally Posted by Ravenswood View Post
In Chicago, residential high-rises are mostly reinforced concrete but office towers are mostly steel-framed.

Why is this so?

It’s not always the case. For example, 311 S. Wacker is a concrete office building. But it seems to be a general rule.

Some have suggested that concrete deadens noise better. But I’ve lived in concrete high-rises that are still plenty loud. I’ve also heard that steel offers larger floor plates for office uses.

Thoughts?

Reinforced concrete is less pliable and is better for lateral forces (wind) in residential towers. Less sway...
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  #2523  
Old Posted Nov 24, 2020, 3:36 AM
Bombardier Bombardier is offline
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Quote:
Originally Posted by Ravenswood View Post
In Chicago, residential high-rises are mostly reinforced concrete but office towers are mostly steel-framed.

Why is this so?

It’s not always the case. For example, 311 S. Wacker is a concrete office building. But it seems to be a general rule.

Some have suggested that concrete deadens noise better. But I’ve lived in concrete high-rises that are still plenty loud. I’ve also heard that steel offers larger floor plates for office uses.

Thoughts?
Several reasons...
- Steel makes sense for offices because steel allows for a larger bay spacing that is more conducive to office layouts.
- Steel allows for easier reconfiguration for changing tenants over time.
- Steel more easily allows for the taller floor to floor height of office structures compared to concrete as the formwork takes more time to install when the floor to floor height is taller.
- Concrete allows for plumbing and electrical to be cast into the slabs which prevents the need for a full dropped ceiling and allows for a shorter floor to floor height than an office use, thereby saving cost.
- Post tensioned concrete is generally used in Chicago and allows for significant cost savings over traditionally reinforced concrete. This makes residential concrete structures more economical, but does not allow for offices to be concrete because post tensioned concrete cannot be easily cored through during future tenant buildouts. (311 S Wacker and 10 S - 30S Wacker are all traditionally reinforced concrete structures).

I'm sure others can expand on this list.
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  #2524  
Old Posted Nov 28, 2020, 3:01 PM
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harryc harryc is online now
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Nov 23

Looking N Up State, from IBM plaza


Looking N Up Dearborn from Marina City


Looking E down Chicago




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  #2525  
Old Posted Nov 29, 2020, 10:52 PM
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  #2526  
Old Posted Dec 1, 2020, 2:55 AM
chicubs111 chicubs111 is offline
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about how tall are we thinking the big tower is at now?...around 600ft?
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  #2527  
Old Posted Dec 1, 2020, 4:13 AM
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about how tall are we thinking the big tower is at now?...around 600ft?
Getting close to that if not there already. One Superior is 502'.
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  #2528  
Old Posted Dec 5, 2020, 4:04 AM
Chicagolover88 Chicagolover88 is online now
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I found this cool pic on Instagram but I don't know how to post pic on here.
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  #2529  
Old Posted Dec 5, 2020, 6:59 AM
Toasty Joe Toasty Joe is offline
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I found this cool pic on Instagram but I don't know how to post pic on here.
I've seen people use the /img tag with instagram photos
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  #2530  
Old Posted Dec 5, 2020, 10:13 AM
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donnie donnie is offline
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I've seen people use the /img tag with instagram photos
Just post the link..... sorry ment to post to guy above you

Last edited by donnie; Dec 5, 2020 at 10:15 AM. Reason: Edit
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  #2531  
Old Posted Dec 5, 2020, 3:24 PM
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Beauty is it skin deep.

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From E Wacker
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  #2532  
Old Posted Dec 5, 2020, 3:56 PM
the urban politician the urban politician is offline
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So far I’m not a huge fan of the Dearborn St side of this project. All the more reason that the “saving” of the Bella Luna building probably was a good thing, by adding a bit of texture and human scale to what otherwise is a giant blank wall
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  #2533  
Old Posted Dec 5, 2020, 4:33 PM
Chicagolover88 Chicagolover88 is online now
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https://www.instagram.com/p/CIW-NyeH...=1s63t0l5jbe6j

This is the link. Sorry if I did it wrong
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  #2534  
Old Posted Dec 5, 2020, 5:02 PM
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jpIllInoIs jpIllInoIs is offline
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Quote:
Originally Posted by the urban politician View Post
So far I’m not a huge fan of the Dearborn St side of this project. All the more reason that the “saving” of the Bella Luna building probably was a good thing, by adding a bit of texture and human scale to what otherwise is a giant blank wall
Speculation around here has been the Bella Luna will sell at some point and we'll get a skinny 4-8 storey resi. which as it turns out will be an awesome little gem of a spot. Full south, west and east exposure for windows, and buffered from north winds by a goliath wind block will create a micro climate of warmth and sun. Also it looks like a lightwell is built in on OneChi side, so marry up with that for your northern wall. And no need for any parking whatsoever with a 100 walk score and public parking next door.
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  #2535  
Old Posted Dec 5, 2020, 9:45 PM
Toasty Joe Toasty Joe is offline
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testing out how to get them added but there is a (somewhat) complicated way


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  #2536  
Old Posted Dec 6, 2020, 1:25 AM
Fvn Fvn is offline
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It's pretty easy...here you go:

Jack Crawford - https://www.instagram.com/p/CIW-NyeH...=1s63t0l5jbe6j
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  #2537  
Old Posted Dec 6, 2020, 1:39 AM
Chi-Sky21 Chi-Sky21 is offline
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Quote:
Originally Posted by the urban politician View Post
So far I’m not a huge fan of the Dearborn St side of this project. All the more reason that the “saving” of the Bella Luna building probably was a good thing, by adding a bit of texture and human scale to what otherwise is a giant blank wall
Actually the reason it looks bad is probably precisely because of how they had to deal with the Bella Luna parcel. You can almost see that they would have liked to have a sort of mini "nub" of a tower on that corner. What is that going to be at the top of that corner anyways? The spacing of the windows up there is strange. Amenity deck gym?
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  #2538  
Old Posted Dec 6, 2020, 10:39 PM
Chicagolover88 Chicagolover88 is online now
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Their on the setbacks now right?
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  #2539  
Old Posted Dec 6, 2020, 11:28 PM
Chi-Sky21 Chi-Sky21 is offline
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What is amazing is that it still looks like nothing compared to the Hancock in that last shot.
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  #2540  
Old Posted Dec 7, 2020, 2:25 PM
Ned.B Ned.B is offline
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Quote:
Originally Posted by Chi-Sky21 View Post
Actually the reason it looks bad is probably precisely because of how they had to deal with the Bella Luna parcel. You can almost see that they would have liked to have a sort of mini "nub" of a tower on that corner. What is that going to be at the top of that corner anyways? The spacing of the windows up there is strange. Amenity deck gym?
Right if you go back to the original renderings the apartments wrapping the west side of the garage wrapped the south side as well. Later renderings after the unsuccessful buyout of Bella Luna continued to wrap the west facade treatment around the exposed south side of the garage, but that was an easy VE to take since much of this side could get covered anyway if a small multifloor building replaces Bella Luna in the future.

Also you are correct on the 8th floor windows. Those are for a basketball court in the fitness center. That whole box is getting covered with a perforated metal panel, so the windows will only really be apparent at night.
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