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Old June 28th, 2010, 08:37 AM   #3981
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Tokyo Sky Tree--building it safely

Because dropping a heavy tool or even a bolt from a high structure in a busy urban area could pose a serious danger to people below, the builder of the now nearly 400-meter-high Tokyo Sky Tree in Sumida Ward, Tokyo, is taking extraordinary precautions.

Tokyo Sky Tree, which will reach 634 meters when completed, is now 398 meters high and likely to surpass 400 meters by the end of July. In constructing the world's highest self-standing radio wave transmission tower, workers are doing their jobs at unprecedented heights.

The tower is being built near Narihirabashi Station on the Tobu Isezaki Line in a residential area where the station platform, rails and houses are concentrated.

Below the tower, trains come and go, and nearby residents walk on roads.

The biggest difference between the construction of Tokyo Sky Tree and that of other skyscrapers, such as the 296-meter-tall Yokohama Landmark Tower, is the environment surrounding the structures.

This has led Obayashi Corp., the main contractor for Tokyo Sky Tree, to introduce unprecedented safety measures in the tower's construction.

For example, the general contractor decided to build the huge steel frame scaffolding for the tower on the ground before lifting it into place with cranes, instead of building the scaffolding on the tower.

This reduces the risk of workers dropping tools while building the scaffolding high up on the tower.

In addition, tarps are placed to protect the workers from winds and block the sometimes dizzying view of the ground far below.

Two safety lines are attached to each worker. Even if workers detach one rope to move from one scaffold to another, the other remains in place. Tools and even ball-point pens are tied with cords to workers' belts. In addition, approximately 100-meter-long protective steel panels are set up over the railway just beneath the tower.

Thanks to those efforts, no workers have fallen and no tools have dropped since the start of the construction in July 2008.

However, on April 17, when Tokyo saw the season's latest snowfall in 41 years, officials were forced to reexamine the safety measures. According to Tobu Tower Sky Tree Co., the business operator of Tokyo Sky Tree, a a lump of snow believed to have stuck to the tower fell near a store in the area.

Though no one was injured, the incident alarmed local residents because of the danger of possible head injuries.

The steel frames of Tokyo Sky Tree are coated with a highly water-repellent material that makes it hard for snow to adhere to them. But despite this measure, another lump of snow, which was believed to have fallen from the tower, was found more than 100 meters from the tower on another occasion.

As the tower will grow even higher, it is possible that workers will have to respond to unknown threats, such as strong gusts of wind. It is also possible that abnormal weather conditions could occur before the work is finished late next year.

A Tobu Tower Sky Tree Co. official said: "We are fighting nature. Though we have implemented safety measures, unpredictable incidents may occur. So we'll have to cope with the situation by continual inspections and accumulating experience."
http://www.yomiuri.co.jp/dy/national...28TDY03T04.htm
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Old June 28th, 2010, 08:49 AM   #3982
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28th







http://tokyo-sky-tree.seesaa.net/
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Old June 28th, 2010, 10:13 PM   #3983
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Old June 29th, 2010, 12:17 AM   #3984
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how amazing !!
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Old June 29th, 2010, 04:46 AM   #3985
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Cool to see the lights on in the pod..
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Old June 29th, 2010, 09:25 AM   #3986
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Very nice pics. The observation pod is really big, too much bigger than i expected before, and looks amazing and beautiful !
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Old June 29th, 2010, 09:30 AM   #3987
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On the 1st of July work will start on the relocation of the cranes.

There's no new height target for July, June was 400m that they almost reached and August is still 440m. That can only mean that we won't see a sudden big growth spurt in the near future when they are working on the cranes.


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Old June 29th, 2010, 09:41 AM   #3988
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wonderful
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Old June 29th, 2010, 01:04 PM   #3989
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looks unbelievable at night.
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Old June 29th, 2010, 08:14 PM   #3990
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A bit dated - 4/2 from Yokohama

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Old June 29th, 2010, 09:17 PM   #3991
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wooow incredible picture

so amazing building
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Old June 29th, 2010, 10:57 PM   #3992
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Has this structure been 'hit' by many earthquakes yet? Anyone know if it's working to spec in handling them? I'm just wondering how much it flexes...
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Old June 30th, 2010, 03:31 AM   #3993
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Quote:
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A bit dated - 4/2 from Yokohama

Can anyone see where Tokyo ends and Yokohama starts?
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Old June 30th, 2010, 07:36 AM   #3994
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The green temple roof is still in Yokohama, the cluster of white flats behind it is Kawasaki and from there on it's all Tokyo.
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Old June 30th, 2010, 04:18 PM   #3995
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When will we see the next visible height change? The pace of this tower has been so fast since day one, it is kinda strange to see a couple weeks with no upward progress!
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Old June 30th, 2010, 04:50 PM   #3996
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Could see Landmark Tower in Yokohama from Minato today, really clear day after a great electrical storm last night. Yokohama is quite close to Tokyo - but the feeling of space there is great.
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Old July 1st, 2010, 01:32 AM   #3997
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I rode in a helicopter over Tokyo about 2 weeks ago and snapped this pic:
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Old July 1st, 2010, 10:52 AM   #3998
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1st leg of Pod-bound crane in place ...
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Old July 1st, 2010, 01:09 PM   #3999
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Awesome picture, Khaan!! do you have other shots of your helicopter ride?
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Old July 1st, 2010, 03:10 PM   #4000
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not mine shots, i've found these at http://bluestyle.livedoor.biz/

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