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Old March 25th, 2005, 06:05 PM   #81
Accura4Matalan
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With long or short spire, it looks fantastic either way.
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Old March 25th, 2005, 06:10 PM   #82
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U know....I think all the changes look unnoticable.
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Old March 28th, 2005, 11:18 PM   #83
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Rooted in bedrock, reaching for the sky
Trump tower will go far above --and far below-- its neighbors

By James Janega
Tribune staff reporter
Published March 27, 2005

The tower will soar above the skyline, but right now there is only an open space by the Chicago River, a home to construction equipment and a matter of fascination to neighbors.

Construction of the Trump International Hotel & Tower Chicago will offer a three-year spectacle of modern construction as the building climbs, level by level, above its neighbors and into the ranks of the world's tallest buildings. When done, it will stand as tall as the John Hancock Center even before its controversial spire is added.

In full view of onlookers, the former Chicago Sun-Times building disappeared from its longtime spot in a matter of months.

Now, passersby watch as drills the size of telephone booths spin into muddy ground where the newspaper offices once stood, spewing damp earth into piles that steam briefly in the chilly air.

Unlike Chicago's other three giants--the Sears Tower, the Aon Center and the Hancock building--the Trump tower will be supported not by a framework of steel but by a spine and outriggers of concrete.

Without high-quality concrete, the structure would never support the building's 360,000-ton bulk--the weight of four aircraft carriers.

Without new chemical processes that make the wet cement more fluid or new pumping techniques to move it, it could never be pumped 92 stories and 1,125 feet into the air.

Without concrete, the building could never climb so high and still stay so thin.

The footprint of Trump's building will be 348 feet by 135 feet--not much bigger than the squat Sun-Times building.

"On a steel building, it would have had to be much wider," said William Baker, a structural engineer at Skidmore, Owings & Merrill, the architectural firm that designed both buildings.

"We wouldn't have been able to put a steel building on this site."

When the building is finished, a skin of stainless steel and glass will reflect the sun. The tower's shape will mirror the buildings around it, its faceted setbacks nodding to the 1920 Wrigley Building and monolithic 1973 IBM Building next door.

The building's designers are using the tower's concrete-swollen weight to defy heavy breezes. By making it too heavy to tip easily, the designers have pitted one of the oldest enemies of skyscrapers, gravity, against its other foe, the wind.

In addition, the setbacks and rounded edges will prevent vortices from organizing into mini-tornadoes, reducing the wind's power.

To further secure it, the building will be cantilevered into a section of the Earth's crust, a limestone formation 420 million years old and 110 feet underground, so the building will touch sky and bedrock at the same time.

Though it will outreach its neighbors, the Trump tower must start far beneath them, on pillars extending like stilts into the ground. The holes for those 4-foot-wide pillars are being drilled now. Under the building, every 30 feet around its perimeter, steel-reinforced cement will be poured.

On top of that, an 8,400-ton concrete pad the size of a river barge will be built. From that pad the building's spine will rise, climbing as Wabash Avenue is rebuilt between the IBM Building and the future Trump tower.

The spine will consist of five gigantic concrete walls, each shaped like an I-beam standing on its 45-foot-wide end. At about eight stories, the exterior columns will begin to follow, with a concrete slab between the columns at each story for a floor.

It will climb like this: Spine, columns, slab. Spine, columns, slab. Eight to 10 floors below the highest slab, the curtain wall will rise on the outside of the structure. As the building climbs, it will narrow, the spine dwindling to two parallel I-beams from five.

As the building takes root, it has become an attraction for the curious. The two-story-deep construction pit extends toward the IBM Building, and a nearby sidewalk has become an observation gallery.

Crane platforms with their coils of heavy cable are at eye level. Viewers see the tops of bulldozers.

One day, the workers will point to the tall shape in the city skyline with a sense of ownership.

Earthmovers heap dirt into piles. The heads of hydraulic dinosaurs bob into the rubble, crushing and pulling scrap metal in their jaws. Rolled steel dangling a dozen feet above the ground is lowered into rows. Sounds echo from the pit.

Above, people watch.

"It looks weird," said bicycle messenger Lee Towne, 47, of Chicago.

"It looks like a whole different site."

- - -

Designed to fit

When built in downtown Chicago, the Trump International Hotel & Tower Chicago will be one of the tallest concrete buildings in the world.

Because the Trump tower needed to fit within the site of the former Chicago Sun-Times, architects chose to build with concrete instead of steel. Concrete allows them to build the building taller without making it wider. Using fluid cement and new construction techniques, workers can pump cement hundreds of feet up into the air.

ADVANTAGES OF CONCRETE

- Does not require a large base for construction

- Virtually fireproof, easier to isolate a high-rise fire

- Floor slabs typically can be thinner, allowing more living units to be built

Designed to handle wind

The asymmetrical design and weight from concrete give the 360,000-ton tower additional stability against the wind

DISRUPTING FORMATION OF VORTICES

Vortices are small forces of whirling wind that can cause the tower to sway.

- Curved edges allow the approaching wind to wrap around the building's corners more easily than around a building without an aerodynamic design.

- Setbacks further disrupt the wind's constant push on the building's shaft and limit formation of vortices.

Building from the ground up

The building process begins several stories below ground. The tower will be layered floor by floor until it reaches 92 stories.

Core: Spine of the building

Columns and slabs: Provide support for each new floor built above.

Caissons: Reach about 110 feet into the bedrock and act as stilts to support the structure.

1. Laying the foundation

Caisson shafts are drilled into the ground, then filled with cement.

2. Forming the concrete structure

The core, columns and slabs are added. This process is repeated for each floor.

3. Enclosing the building

Stainless steel, glass and aluminum panels are attached at each floor.

4. Finishing the interior

Interior components, such as drywall, electrical and mechanical systems, elevators and doors, are added.

CONSTRUCTION TIMELINE

Approximate times

1. (Early 2006)

2. (Mid-2008)

3. (Mid-2008)

4. (Early 2009)

To build the tower with steel, the building would need to be 25 feet wider.

Concrete: 135 feet

Steel: 160 feet

Height excluding spire: 1,125 feet

Spire

Will rise to 1,360 feet, which will make the tower 90 feet shorter than the Sears Tower.

Inside

- Penthouses

Floors 86-89

(Ranges from a 2,343 sq. ft. two-bedroom unit to a 14,260 sq. ft. seven-bedroom unit)

- Residential condos

Floors 29-85

- Hotel condos & executive lounge

Floors 17-27

- Hotel restaurant, ballrooms & conference center

Floors 16-17

- Health club and spa

Mezzanine and floor 14

- Parking

Floors 3-12

- Lobbies, restaurants and retail

On lower floors

Stainless steel/glass/aluminum panels

Sources: Skidmore, Owings & Merrill LLP; Koenig & Strey GMAC Real Estate; Bovis Lend Lease Inc.; Joe Nasvik, senior editor of Concrete Construction magazine

Graphic by Gentry Sleets and Keith Claxton.

Chicago Tribune

- See microfilm for complete graphic illustration.

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Old April 29th, 2005, 01:59 AM   #84
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The most up-to-date renderings.

Well guys, I did the best that I could, and I hope that this is okay. Let me know







ENJOY
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Old April 29th, 2005, 03:32 AM   #85
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AWESOME PICS..great job...my favorite project in the US.
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Old April 29th, 2005, 03:36 AM   #86
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Good to see the gap between Aon and J.Hancock center with something there. I think its a really good looking building.
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Old April 29th, 2005, 03:42 AM   #87
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Haha! Sleek!
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Old April 29th, 2005, 03:47 AM   #88
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looking very handsome! nice
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Old April 29th, 2005, 03:47 AM   #89
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Take notice, Stinson!!
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Old May 12th, 2005, 01:29 AM   #90
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Trump Tower Height Adjustment

Myself, Tom in Chicago and Chicago Shawn got the opportunity today to get a brief look at the blueprints for Trump International Hotel & Tower chicago today in the Bovis construction trailer. You guys might be happy with these numbers

Roof height: 1130' 10"

Structural (to the top of the structural screen): 1171' 0"

Tip (top of the spire): 1361' 6"


There will be 4 lower levels

I'm sure that we will make several treks back to the construction trailer throughout construction.
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Old May 12th, 2005, 01:57 AM   #91
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Quote:
Originally Posted by BVictor1
Well guys, I did the best that I could, and I hope that this is okay. Let me know
Those are incredible renderings, but you need a better photo to use for that bird's eye one.

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Old May 12th, 2005, 02:01 AM   #92
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wow cool
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Old May 12th, 2005, 03:27 AM   #93
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well I was skeptical at first about the added spire, but the more I think about it, I think it looks pretty nice, especially if it's a good spire that blends in with the tower.
And great renderings too
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Old August 27th, 2005, 08:37 PM   #94
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http://www.trumpchicago.com
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Old September 18th, 2005, 02:11 PM   #95
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As Trump tower rises, setbacks pile up
Building battles challenges of nature, markets

By Susan Diesenhouse
Tribune Staff Reporter
Published September 18, 2005

In July, three months after construction began on the foundation of the 92-story Trump International Tower and Hotel, water began leaking into the building site from the Chicago River.

With the foundation being laid next to and below the level of the river, it always was a possibility that the old sea wall wouldn't hold. It did, but water began seeping through seams in a corner where the wall meets the Wabash Avenue bridge.

The construction of any building is not just the grand achievement of architects and engineers. It is the culmination of a million tiny tasks, and the triumph of overcoming a million tiny problems--any of which could become a crisis.

The difficulties in building the biggest building in a generation in Chicago go beyond just bricks and mortar. They started with the job of finding the site, creating the design and raising the money. They continue with putting the building up and keeping costs down.

In fact, there are bigger issues than seeping water or worries about dropping a 140-foot beam on the roof of the IBM building's garage next door. One is preventing the project from buckling under the rising costs of construction materials.

"What I really worry about is all the trades I haven't bought," said Paul James, using construction industry jargon for the millions of dollars of materials he has yet to purchase for the interior of the building. James is overseeing the project for the construction manager Bovis Lend Lease Inc. of London.

From the outside, none of this is visible. Passersby who peer down into the construction site from a temporary pedestrian walkway see a modest-size pit along the Chicago River.

"But it's much more," said Donald Trump Jr., vice president of development and acquisition for the company whose chief executive is his flamboyant father.

Since last fall, Trump Corp. has demolished the Chicago Sun-Times building that stood on the 2-acre site and completed some of the project's most difficult spadework, which is key to the structural integrity of the 2.7 million-square-foot tower.

The ear-shattering percussion of pounding 241 supports, called caissons, deep into the earth may have jangled neighbors' nerves. But to the New York-based developer it is essential to laying the foundation for the approximately $800 million building.

It had to drive 57 of the caissons 110 feet into limestone bedrock, a feat reserved for construction of the tallest towers here.

"The Trump edge is understanding construction," Trump, 27, said on one of his weekly visits to the site.

The rest of the foundation system and basements are being built on the caissons, which will support the weight of the entire tower, equivalent to 240,000 cars.

In October, workers will pour the high-strength concrete for the steel-reinforced mat that will unite and secure the caissons. Upon the mat--which will be 240 feet long, 60 feet wide and 10 feet deep--will rest the tower's core walls.

By next year, the core walls will start to rise. By fall 2007, portions of the building are expected to be ready for occupancy. The tower, which will house 758 private and hotel condominiums as well as retail space, is expected to be finished in 2009, Trump Jr. said.

In part, the Trump construction formula is about selective cost-cutting, which Trump Jr. said he learned at his father's elbow, following him around building sites just as his father trailed after his grandfather.

To keep costs down, he said, "We don't let architects build every feature." But it's also about simplifying the process.

So far, the construction work completed is worth near $30 million, or 5 percent of Trump's $600 million construction budget. Another $200 million will be spent on other aspects of the development. But no matter how smoothly construction goes, erecting a 1,362-foot-tall tower is a complex undertaking.

"Tall buildings are more demanding as an engineering solution," said architect Richard Tomlinson, a partner at Skidmore, Owings & Merrill, LLP. His firm designed the Trump project as well as the Sears and Hancock towers in Chicago.

The Trump tower will stack retail, parking, a hotel and condominiums on top of each other. This change of uses changes the design of the interior space.

A three-bedroom residential condominium will have bathrooms in different locations than a hotel suite. Therefore, plumbing can't descend directly down the tower but must at times be routed horizontally, which makes the system more costly and its operation more difficult to fine tune.

The same is true of load-bearing columns. The 14 million pounds that each column carries must be transferred horizontally via huge girders. "As the tallest tower to be built post-9/11, it's a celebrated project," said John Fish, chief executive of Boston-based Suffolk Construction Co., a major East Coast builder who is watching the project's progress. "But it poses special construction challenges."

With the price of construction materials up sharply in the last two years, cost containment on such a mammoth project is a chore, Fish said.

For instance, the average nationwide price of concrete, the material being used for the foundation and frame, increased 14.5 percent during the last year, according to Engineering News Record, a trade publication. Last fall, after an 18-month debate, Trump decided on an all-concrete frame, in part to eliminate the expense of using structural steel, a commodity whose price had doubled since summer 2003.

Still, James is concerned about materials required to build out the interior because they have not yet been purchased, and prices could rise as a result of rebuilding efforts in the nation's storm-damaged areas.

Further, such a large project requires so much construction material that it can pinch supplies, raising prices throughout the marketplace, said Ron Klemencic, chairman of the Council on Tall Buildings and Urban Habitat.

In April, Trump Corp. started to build the foundation system below the Chicago River; in August, contractors started to excavate for the basements.

"This is probably the trickiest part of the construction process," said Stephen Fort, general manager of the Chicago office for Turner Construction Co., which is not involved in the project but, like most in the industry, is watching with interest.

"When you're in the hole, there are so many unknowns, you don't control your own destiny," he said.

In the spring, Trump Corp. sealed an old freight tunnel and removed dock pilings from the site. But in July water started seeping in and the builders had a problem. They sent divers into the murky river to see whether the leak could be sealed from the water side. That failed, as did several other attempts to correct the problem. Finally, they came upon a solution.

"We drove a steel plate next to the gap, dug out the space between and filled it with concrete," James said. "That worked. In a big project like this there are lots of opportunities to have major things go wrong. This wasn't one of them."

Most of the tower's caissons descend into hard clay about 75 feet down, but others were drilled an extra 35 feet, including 6 feet into bedrock.

"That's a long way, made tougher by managing the water in the hole," Klemencic said.

Meanwhile, a concrete pump for the project is being custom-made in Germany. Every hour its 630-horsepower engine will be able to pump 100 cubic yards of concrete and send it as high as 1,700 feet.

"Previously, we could only get up to 700 feet vertical," James noted.

Still, the old Sun-Times building that Trump purchased for $74 million, including the land, has proven to be an unexpected boon, Trump Jr. said.

During site preparation last fall, the company encountered less ground pollution from the printing plant than anticipated because in the 1970s the newspaper switched from petroleum-based to soy-based ink. Trump therefore avoided some costly site cleanup.

Finally, the company saved at least $1 million by reusing the Sun-Times' old sea wall.

"In the 1950s, the Sun-Times built it to withstand another sort of terrorism: the Cold War," Trump Jr. said. "It was as thick as a bomb shelter."

Trump's tower

HEIGHT: 92 stories, or 1,362 feet, the tallest skyscraper to go up in the U.S. since the 1992 completion of the Bank of America Plaza in Atlanta.

ARCHITECT: Skidmore, Owings & Merrill LLP, which designed the Sears Tower, at 1,450 feet, the nation's tallest building, and the John Hancock building, at 1,127 feet.

COST: approximately $800 million

COMPLETION: 2009

DETAILS: 472 condominiums, 286 hotel condominiums, 100,000 square feet of retail, parking for 1,000 cars and a three-tiered riverfront park.

PRE-SOLD: 572 resi-dences valued at approximately $700 million.

FINANCING: $640 million construction loan from Deutsche Bank AG.

Source: Trump Corp., Council on Tall Buildings and Urban Habitat

----------

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Old September 18th, 2005, 02:15 PM   #96
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FRONT AND CENTER
Trump Jr. builds on roots

Working for father, he's in Chicago regularly to check progress on hotel/condo tower

SUSAN DIESENHOUSE
Published September 18, 2005

Donald Trump Jr., vice president of development and acquisition for New York-based Trump Corp., visits Chicago nearly every Tuesday to check progress on the 92-story skyscraper the firm is building on the former site of the Chicago Sun-Times building. The 27-year-old executive shared some of his thoughts about the project and Chicago in an interview with Tribune reporter Susan Diesenhouse.

Q. What's your impression of Chicago?

A. It's a financial capital like New York, our bread and butter. Chicago is similar to New York minus some of the pretension. People mix better. It's a breath of fresh air. New York can be a little cliquey. Chicago is a great architectural city; the best in the country. Our building is designed by an architectural legend [Adrian Smith, a partner at Skidmore Owings & Merrill LLP]; that makes it easier for us.

Q. What have been the most challenging aspects of this project so far?

A. Financing a building of this cost and size was incredibly difficult. Not too many people will write a check for $640 million; not too many bankers wanted to finance the largest condominium project in the U.S. With offices, we could say, "We have a long-term lease." With apartment sales at these crazy numbers, it was hard to get them to understand the asset we were sitting on. This is something new, and bankers don't necessarily want to break the mold. They have investors to answer to.

Also marketing the hotel condos. People didn't understand them. An individual buys a unit, puts it into a rental pool. When the owner isn't there, they rent it out and have cash flow. It's an interesting way to own real estate; having it carry itself when you're not in it. We went six weeks without selling one so we went back to the brokers. Now they're selling well, maybe better than the condos.

Q. What was the genesis of this project?

A. The first talks were in 1999. By 2000, 2001 the plan was to build the world's tallest building--all commercial. After 9/11, that was scrapped as not the greatest idea because the Chicago office market wasn't hot. By the end of 2003, we started sales with 500,000 square feet of commercial space. A year later, condo sales were so phenomenal we eliminated the offices.

Q. At this point, what aspects of construction have been most captivating for you?

A. What's fascinating for me as a developer is digging this deep to do caissons (supports for the building). Also, it's really interesting that we couldn't have built this 15 years ago in all concrete. It wasn't strong enough back then.

Q. Did 9-/11 change any of your construction plans?

A. We've always been good about building safety systems into our buildings; our name is on every one. So, post-9/11, we see that we've been doing everything right all along.

Q. Have you decided if you're going to add a spire to the top?

A. We don't have to decide yet, but it doesn't look like we'll have an architectural spire that brings it to the tallest building.

Q. Where else is Trump building?

A. Las Vegas, Ft. Lauderdale, Sunny Isles, Phoenix, New York, L.A., Palm Beach. Some cities will do anything to have Trump come in. It means they've arrived. We get great locations and we aren't known for overpaying.

Q. Who do you answer to on this project?

A. I report to my father. He's the ultimate decision-maker. I've been in my current position for one year. I've been working on the project since 2001, a year after I graduated form Wharton. I understand the numbers side and started as a grunt analyst.

Q. And Bill from the television show, "The Apprentice," what's he doing?

A. He's largely sales and marketing. He'll be with us for another year.

Q. What do you worry about? What keeps you up at night?

A. What don't I worry about? I want to see Chicago real estate thrive. We've made money for every other developer in Chicago by re-establishing the center. It's very exciting to see the Sun-Times go down and this go up.

----------

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Old September 18th, 2005, 03:25 PM   #97
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does this mean that chicago people now like spires and antenas?
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Old September 18th, 2005, 05:55 PM   #98
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I don't think we have anything against spires (and antennas definitely not) but we still won't count by them.
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