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Last Updated: Thursday, 2 August 2007, 23:41 GMT 00:41 UK
Tower demolition defies gravity
The building being demolished bottom up

A 15-storey building in London's financial district is defying gravity by being demolished from the bottom up.

The topsy-turvy method of demolition, which has left the building's concrete core exposed, is being used because of the unique way it was constructed.

The floors are supported by a beam hanging from the roof rather than being supported by columns from the ground.

The building on Leadenhall Street in the City will be replaced by a 736ft skyscraper, dubbed the Cheese Grater.

The 1965-built office block was one of only four which was built in the upside down fashion, according to the company overseeing the project, real estate investors British Land.

The demolition team will work its way up, removing a floor at a time, and finally deconstructing the beam.

The concrete core will then be disintegrated from top down.

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