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Lift up industrial method, it's marvelous !
In the construction of Tokyo Big Sight, the building technique of lift up industrial method was multiused. For instance, the roof of the hall is made by this industrial method.

At first four temporary pillars are put up , and the cranes are set up on the top of the pillar. 

The roof is assembled on the ground. At this stage, the roof has been almost completed. The pane is set on the ground. 
The crane on the pillar lifts the half finished roof. 
When the ceiling goes up to a fixed position, a genuine pillar is set up internally. 

The roof of the east exhibition hall lifted to a fixed position at half a day in Tokyo Big Sight .

We lifted the conference building of that inverted pyramid type up to the height of 56m by this industrial method.

If the roof is made in that height by a past industrial method, it is necessary to put up the footing to a high position considerably. 
It is dangerous if you does so. It takes long time. It is a hardship to transport the material. 

If the lift up industrial method is used, such time can be considerably saved. 

　

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