General Question

ragingloli's avatar

How are skyscrapers, located in the middle of cities, demolished?

Asked by ragingloli (44254points) 3 weeks ago

Are they deconstructed floor by floor?
Or do they use explosives, like with the World Trade Centre?

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7 Answers

ARE_you_kidding_me's avatar

Explosives and sequential deconstruction.

LadyMarissa's avatar

Dynamite followed by a lot of cleanup!!! It’s actually an amazing thing to watch. With the explosives placed in the appropriate location, the building just kind of folds into itself with anything around it still intact & covered in dust. Here is a good example. The World Trade Center Tower was also an example of how it could happen.

This one is in Germany

JLeslie's avatar

Watching buildings come down by purposefully imploding them is amazing. How they figure out how to do it, just the right amount of explosives. They do clear people away a certain amount of distance in case something goes wrong. I would guess that sometimes means an entire building or two might have to be evacuated for the event.

kritiper's avatar

They are imploded so the building comes straight down within itself, and within a very small area.

flutherother's avatar

It isn’t always possible to blow them up in densely built up areas and some high rise buildings have to be physically dismantled floor by floor using long reach mechanical excavators or even by lowering the entire building floor by floor on hydraulic jacks.

None of these techniques is very practicable with the tallest buildings now being built eg the 2,700 foot Burj Khalifa, and I don’t think anyone really knows how they can be safely brought down.

Call_Me_Jay's avatar

The Singer building was the tallest built in 1908 and the tallest destroyed in 1968.

The blog link below has a newspaper clipping showing it being dismantled. It looks just like a building being constructed, with a crane on top and exposed steel skeleton.

Scroll down to see “End of a Skyscraper” – A celebration of the Singer Building

dabbler's avatar

If there are buildings adjacent you simply cannot use explosives.
In NYC buildings we see buildings dismantled floor by floor.
A novel approach was used in Tokyo on this building by enclosing the top with what amounts to a demolition factory.

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