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Towering achievement in steel engineered pile casing

London’s new steel and glass 242 metre Heron Tower is being built on Tubosider
technology, using 16 specially engineered steel pile casing structures each
running almost 14 metres into the ground.

Commissioned by contractor Cementation Foundation Skanska for over £200,000,
each black pile casing is 2.7 metres in diameter and 3.5mm thick, with upper and
lower spacers top and bottom plus flanges and braces. Each mesh-reinforced
casing was also fitted with a 1-metre extension for lifting and fitting.

“It was critical that the casings were designed to withstand any deformation either
in transit or installation, and that they were finished and ready for a tight schedule,
which they have been,” says project manager Brenton O’Loughlin. “They also met
extreme tolerance levels – a few millimetres out of position would have failed.”

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