16
Jan
2018

Existing SASA shiploader incorporated in the upgrade of Maydon Wharf

An upgrade of the Maydon Wharf berths to facilitate a deeper draft resulted in the cope of the quayside being moved forward by 2m. The South African Sugar Terminal, owned by the SA Sugar Association (SASA), is located on the wharf and has historically exported its sugar onto vessels using the two 850 tph shiploaders that were designed to feed onto 35 000t Handymax vessels.

Bosch Projects was appointed in 2013 to review a proposal dating back to 2003 for the lengthening of the shiploader booms to accommodate larger, Panamax vessels. Our review took account of the changed circumstances at the port and led to the proposal of an alternative concept of modification, rather than lengthening of the shiploaders.

In July 2014, Bosch Projects was appointed by SASA to produce detailed designs for tender purposes, and in March 2016 our appointment was further extended to adjudicate quotations for the modification.

The deeper draft, whilst allowing for the efficient berthing of larger 80 000t Panamax vessels, would have resulted in the shiploaders becoming redundant and unable to operate. Yet the machines which had operated in the harsh sea air for 50 years, proved to be in good overall condition, with no evidence of fatigue nor excessive corrosion.

The most effective solution was therefore to retain the existing shiploaders and build them into a new sub structure that utilised a new cope quayside rail.

The old 20m high, 112 ton shiploaders were overhauled and effectively moved forward 4m and raised by 1.32m. They were then incorporated into a replacement Variable Speed Drive driven sub structure to allow the existing boom access, and clearance, to larger Panamax-type vessels, even at the highest tide. The feed conveyor retained its existing angle and feed on point by being ex.

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