Take a look at the construction site of Tokyo Sky Tree, the tallest broadcasting tower in the world. Correspondent spoke with the designer of Tokyo Sky Tree on how it was built to resist even the strongest earthquake in the country.
Tokyo Sky Tree will become the world's tallest free standing broadcast tower, and is revealing its secret in overcoming earthquakes in quake-prone Japan.
Standing over 630 meters high, Tokyo Sky Tree was designed by Nikken Sekkei, a Japanese architecture firm experienced in building quake-resistant, high-rise buildings in Japan.
The company developed a system of adding mass as a balancing weight to buildings, to control how they sway during an earthquake.
For the Tokyo Sky Tree project, the emergency staircase, situated in the core of the tower, acts as the mass, controlling sway during an earthquake.
According to Nikken Sekkei, it's the first in the world.