Compact Cone Fender systems for Geraldton, West Australia

Special design of cone fender system for Geraldton Berth 7

Side view of compact Cone Fender systems at Geraldton Berth 7When QuayQuip’s design engineers were asked to create Cone Fender systems for Berth 7 at Geraldton, West Australia, they were faced with an interesting challenge.

Berth 7 would be fitted with Cavotec mooring systems. The gap between units along the quay front was too cramped for conventional chain and anchor designs. The concrete shell design of the quay also meant that the ‘cone’ of shear forces must be begin far back into the finished structure: something that even the best conventional anchor systems could not achieve. A novel design was called for.

QuayQuip engineers chose a very compact ‘crossover’ chain design that would lower the QCN 1600 system’s footprint along the quay face. The anchor design was a more complex proposition. Rigorous calculations showed that a sophisticated, custom anchoring array could transfer loads to a safe distance behind the quay shell. The illustration below shows the shell prior to filling with concrete, and how the anchor array projects back into the structure to safely transfer shear forces.

Six systems were delivered earlier this year along with four 80 tonne T-Head bollards. The QuayQuip and Cavotec systems have worked perfectly together.

The project consultants were AECOM.

Rendered overhead view of cone fender anchorage at Geraldton Berth 7

About Geraldton
Operated for Karara Mining, Berth 7 at Geraldton is the latest part of an iron ore export facility with a 16 million tonne annual capacity. The berth is designed to receive Panamax vessels (around 100,000 DWT) without interference to the other six berths. It is 250m long and 13.1m deep at mean tide.