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NGI Case Study – Screw Piling

Outline:

It has long been thought that galvanising screw piles is not necessary because the galvanised coating will be removed when screwing the pile into the ground.

We have inspected some test piles that were driven into sandstone at Injune, Queensland then removed 3 weeks later. The galvanised coating was still present and the coating thickness is still within the Australian standard.

These screw piles were also exposed to the elements for 6 months before the readings were taken.

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