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Old March 12th, 2006, 09:03 AM   #281
ChiLooper
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I love the green river
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Old March 15th, 2006, 09:42 PM   #282
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Just a quick heads up...

The History Channel will be featuring a serries of programs on "big tools" this Sunday, and acording to the previews Trump's caisson job will be featured. It begins at 7pm.
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Old March 21st, 2006, 10:40 PM   #283
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http://chicagobusiness.com/cgi-bin/m...searchType=all

By John T. Slania


Cement and soil
TRUMP RISING


Call them the "soil guy" and the "concrete guy." William Walton, senior principal engineer for STS Consultants Ltd. in Vernon Hills, makes sure buildings are on solid ground. His colleague Robert Acker, a principal engineer at STS, figures out whether concrete is strong enough to withstand nature and time. Both have shored up Soldier Field, the Nordstrom on Michigan Avenue and the 1 N. Wacker Drive high-rise. They're now at work on the Trump International Hotel & Tower.


William Walton and Robert Acker have key roles in the tower's structural integrity. Photo: John R. Boehm

You often consult as a team. How does it work?

MR. WALTON: I'm the first one on the job. I'm drilling down into the earth, taking soil samples to see what the foundation will be built on.

MR. ACKER: I come in when the foundation is being poured and when the building is going up. I'm taking concrete samples each time there is a pour.

Describe the concrete sampling process.

MR. ACKER: When the concrete is poured, we take plastic containers (about the size of a football) and fill them with the concrete. We take the samples back to our laboratory and subject them to stress tests.

How do you take soil samples?

MR. WALTON: I drill into the earth in different spots to see what the texture of the soil is. It's slightly different in each spot. You're trying to determine how far you need to sink the foundation. Is the soil firm enough, or do you need to go down to bedrock? Securing a building into bedrock costs a developer four times as much.

What's unique about working on the Trump project?

MR. WALTON: First was with the soil. I actually started taking soil samples before the old Sun-Times building (on which the construction site sits) was torn down. I was in the old press room, where I drilled through the floor and into the soil to get samples. It was a strange experience because the old presses were still in there and the last run of the newspaper was still on the press. I also found some old architectural drawings of the Sun-Times building in the press room. Those really helped me, especially when it came to dealing with the river wall.

What challenges do you face building along the Chicago River?

MR. WALTON: This is a small site where you have land on one side and the river on the other. We were very interested in making sure this thing didn't slide toward the river. There is also a strong wind-tunnel effect. The building will act like a big sail, taking on a lot of wind. So we needed to sink caissons into the bedrock to ensure the structural integrity of the building.

MR. ACKER: Pouring the mat foundation. It took 23 hours and 4,651 cubic yards of concrete.

What's it like working for the Trump organization?

MR. WALTON: They listen to what we have to say. And they pay their bills.
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Old March 25th, 2006, 02:02 AM   #284
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From 30 minutes ago.





If anyone is thinking of going to the sales center to get photos, don't. They won't allow you to take them. I had to get this when the receptionist left the room to ask if it pictures were allowed. I had to act fast.


Speaking of the sales center, they have a more up-to-date model of the tower. I would have taken shots, but once again, not allowed.
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Old March 25th, 2006, 04:13 AM   #285
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It's a good night tonight. Been looking for updates. The shot from above is really cool. You can better see the shape.
What's that round thing in the upper left?
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Old March 25th, 2006, 05:05 AM   #286
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Great shots particularily the one from above. Surprised they wouldn't post those shots somewhere if they won't let people like you do so.

Quote:
What's that round thing in the upper left?
Parking ramp?
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Old March 25th, 2006, 05:07 AM   #287
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^Thats exactly what I was going to say! A circular ramp leading to the underground parking.
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Old March 25th, 2006, 08:56 AM   #288
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Nice pictures, keep us updated all you Chicago residents.
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Old March 25th, 2006, 09:39 AM   #289
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Quote:
Originally Posted by uberalles
It's a good night tonight. Been looking for updates. The shot from above is really cool. You can better see the shape.
What's that round thing in the upper left?
is it just me, or does anyone else look at this and see a large (albeit distorted) ship?
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Old March 25th, 2006, 07:41 PM   #290
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Quote:
Originally Posted by danthediscoman
^Thats exactly what I was going to say! A circular ramp leading to the underground parking.
It doesn't lead to underground parking. Underground parking is acessed via Kinzie Street. The circular ramp will lead to parking which begins on the 3rd floor of the tower. I believe that parking is from floors 3-12.
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Old March 26th, 2006, 12:15 AM   #291
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Quote:
is it just me, or does anyone else look at this and see a large (albeit distorted) ship?
It does look like an aircraft carrier.
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Old April 3rd, 2006, 06:41 PM   #292
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April 02




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Old April 3rd, 2006, 07:13 PM   #293
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Hmmm.... Round columns. That's weird.
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Old April 3rd, 2006, 07:21 PM   #294
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Why?
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Old April 3rd, 2006, 09:26 PM   #295
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I built buildings a long long time ago and all the columns were square. I don't remember any that were round. Is that pretty normal now a days?
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Old April 3rd, 2006, 09:29 PM   #296
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I think so, I`ve never seen square columns
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Old April 3rd, 2006, 10:27 PM   #297
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Makes sense. Probably the corners didn't add much strength and just ate up material.
Back to the way the Greeks did it with their round columns.
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Old April 3rd, 2006, 10:38 PM   #298
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i got news for you , although it is commonly thought that greeks invented columns . in fact they didnt.they did however, invent specific ornamental styles to adorn the column. but this is all an arugument for a dif. time and a dif. thread in a dif. forum.

Last edited by wickedestcity; April 3rd, 2006 at 10:46 PM.
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Old April 3rd, 2006, 11:03 PM   #299
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reinforced conc. columns are poured in both square and circular shapes. i'm no structural engineer, so i don't know the reasons why one shape would be used in a given application over the other, but rest assured that both shapes are still used.
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Old April 5th, 2006, 04:55 AM   #300
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With crews finally pouring the second floor I thought I would give my update. I'm not going to do this for every floor, this one just took a month and is the biggest floor. I know the pump is blue, but to make it more visible I made it red.

Current Progress:
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