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On North Breakwater manufacturing place the Dolosse were stored until they are installed at the breakwater. A gantry crane brought in the designated location. (00092051)

Hafen Richards Bay/Richards Bay Harbour        Dolosse production North Breakwater        North B

Description: Hafen Richards Bay/Richards Bay Harbour

Dolosse production North Breakwater

North Breakwater production location for dolosse

The production locations for the production and storage of the 48500 dolosse lay directly behind the north breakwater (likewise behind the south breakwater). The dolosse were concreted along a ramp. The concrete transport mixer drove along the ramp and brought the concrete via a delivery chute directly into the dolosse steel formwork. After stripping the formwork the dolosse were transported off with a gantry crane and stored at first singly. After fully hardening they were put into interim storage until being mounted on the breakwater. In order to accommodate as many dolosse as possible in the storage area, four dolosse were stacked on top of each other. Dolosse are a South African invention, a type of double hook out of unreinforced concrete. Both hooks are twisted at 90 degrees against each other. Once placed, they jam into one another and thus resist displacement by the waves. At north breakwater 5 t and 15 t dolosse were used. At south breakwater (greater water depth) 20 t and 30 t dolosse were used additionally.


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