The foundation needed to be able to support the weight of a heavy concrete swimming pool and building.

The foundation was to be installed in a location where a previous structure had been demolished but the original foundation piles remained.

The founding layer varied across the site, and there was very weak soil above the founding layer which would provide negligible lateral support.

H5 treated Radiata Pine timber piles were determined as the best solution to be installed down to the founding layer.

Comprehensive geotechnical investigation needed to be carried out to verify the pile design.

Pile Driver Analyzing (PDA) testing to verify pile capacity needed to be carried out.

Installation needed to be rapid.

The retirement village was already occupied so disruption and noise had to be minimised.

The site was constricted with pile positions located extremely close to existing buildings.

The constricted site meant relatively small equipment needed to be used – the subcontractor, Markovina Pile Driving had the right equipment and expertise for the project.

The constricted site also meant that in order to reach the depth requirements piles needed to be joined on site with proprietary polyethylene PE100 sleeve joiners.

Each MultiPole Uglie pole was machined on one end so that the joiner fit securely.

Pile Driver Analyzing (PDA) testing for Dynamic Load was carried out to verifiy pile capacity, and a geotechnical ultimate load capacity of up to 215kN per pile was successfully achieved.