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Old August 28th, 2008, 10:18 PM   #4141
Chi649
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http://www.rejournals.com/news/21124...on-trump-tower

THURSDAY, AUGUST 28, 2008

Construction topped off on Trump Tower
by Illinois Real Estate Journal Reports
Chicago

Concrete crews from James McHugh Construction Co. hauled up the final bucket of concrete to the top of Trump International Hotel and Tower Chicago last week, officially completing the 92nd floor of the tallest reinforced concrete building in the Western Hemisphere.

An American flag flapped in a light breeze atop the concrete bucket, which took 12 full minutes to haul via crane from ground level to the 1,170-foot top of the tower, which will be the second-tallest building in Chicago when complete. McHugh, the concrete contractor for the project, has been working with construction manager Bovis Lend Lease to erect the structure for The Trump Organization. Chicago's Skidmore, Owings & Merrill LLC is the project architect and engineer.

"This is quite a feat," said Dave Alexander, McHugh's senior vice president. "We've learned a lot about building tall in the process." Trump is the tallest building erected in the United States since Sears Tower, completed in 1974.

Next month, workers will begin attaching the architectural spire that will enable the building to reach its official height of 1,362 feet.

Since work on Trump began three years ago, McHugh has poured 180,000 cubic yards of concrete-20,000 truckloads-and laid 25,000 tons of steel reinforcing bars to erect the tower. That equals enough concrete to build 10 medium-sized high-rises of 30 to 40 stories, according to Brett Szabo, McHugh's senior project manager.

Despite the building's size, McHugh worked on a rapid schedule, pouring a floor a week for the building's massive lower levels, and a floor every three days for the upper levels. To handle the volume of concrete and the extreme height, McHugh acquired a 680-horsepower Putzmeister concrete pump, one of the first of its kind in the United States, to drive the river of liquid concrete up through more than 1,700 feet of tubing known as slick lines and keep 35,000 pounds of material flowing through it. The pump could push more than 6,000 pounds of concrete to the top per minute, as opposed to 10-plus minutes per bucket via crane.

With the final floor poured, McHugh will begin removing one of the two Liebherr tower cranes on the site. The second crane will be removed after the spire is placed.

The wind and weather encountered building a supertall structure in Chicago posed its share of challenges to McHugh. Crews battled extreme cold, with temperatures more than 30 degrees colder than street level, and winds that blew up to 30 mph harder than on the ground, while pouring the upper floors. A three-story-tall windscreen, which McHugh introduced for use in the United States, provided protection, and the team learned to demobilize quickly when wind gusts exceeded safe levels.
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Old August 28th, 2008, 10:36 PM   #4142
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Chicago really earned it's title of The Windy City.
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Old August 28th, 2008, 11:05 PM   #4143
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(Ellegant, shiny, tall, amazing) tower. Love it!
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Old August 28th, 2008, 11:31 PM   #4144
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08/27/08



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Old August 28th, 2008, 11:53 PM   #4145
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not long to go now then
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Old August 29th, 2008, 01:54 AM   #4146
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the title of the thread needs to be changed
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Old August 29th, 2008, 02:26 AM   #4147
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is it topped out when highest part of building has been built OR when spire goes up?

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original
http://farm4.static.flickr.com/3241/...4fc34691_o.jpg
image hosted on flickr
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Old August 29th, 2008, 11:43 AM   #4148
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usually when the main structure or the body tops out, not the spire.

E.g. now the guangzhou TV is said to have topped out but spire is not installed yet but only the core has reached its peak.
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Old August 29th, 2008, 12:40 PM   #4149
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The core topped out, no one said the building.
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Old August 29th, 2008, 09:17 PM   #4150
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since the spire is a structural part of the tower it is not Topped out yet, so no title change yet
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Old August 30th, 2008, 12:02 AM   #4151
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just a question... since when did a spire become a structural component of a building that without it, the building would not stand?
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Old August 30th, 2008, 12:09 AM   #4152
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of course the tower would stand without it . but a Spire is a part of the tower and its design, so it counts to the height...not like an antenna
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Old August 30th, 2008, 12:11 AM   #4153
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i thought the CTBUH didnt count the spire as the actual height of the building in almost every one of their categories.....
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Old August 30th, 2008, 12:13 AM   #4154
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I think you're probably mixing up spires with antennae.
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Old August 30th, 2008, 12:15 AM   #4155
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well, now that i think about it, isnt the"spire" a functional antennae on this building? like the first WTC? they didnt count that as part of the height....


please correct me if im wrong, i would really like to know

Last edited by RON-E; August 30th, 2008 at 12:24 AM.
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Old August 30th, 2008, 01:17 AM   #4156
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spires arent needed, they rarely even look good, just put there to increase the height.
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Old August 30th, 2008, 06:20 AM   #4157
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From today:



Last edited by i_am_hydrogen; August 30th, 2008 at 07:47 AM.
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Old August 30th, 2008, 06:53 AM   #4158
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Wow, that was fantastic, could you put your first photo in a 1680x1050 format? thx
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Old August 30th, 2008, 01:11 PM   #4159
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First picture is amazing!!!

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Old August 30th, 2008, 02:08 PM   #4160
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WOW
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