Daruma-otoshi Building Demolition


(YouTube link)

This is astonishing. Japanese company Kajima Corporation is using a building demolition method called daruma-otoshi in which they replace the support columns on the bottom floor with huge computer-controlled jacks. They dismantle the entire bottom floor, then lower the building floor-by-floor! Compared to blowing it up, this method saves time and space, pollutes the air less, and makes material recycling easier. And as much as we like to see old-fashioned implosions, you have to admit this is pretty cool to watch. Link -via the Presurfer

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Peter, I think if you take all things into account: the time it takes to get permission to use explosives in a tightly controlled environment such as that (i.e. buildings nearby), the time it takes to plan, safety precautions, clean up afterwards (the dust cloud would probably be immense) and so forth I'm not at all amazed that this method is faster.

The actual tearing down phase may take longer than a quick kaboom, but there's so much more surrounding it, and I don't think you can beat this for safety anyway :)
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