A key strategy of the provincial government of the Western Cape is to make a significant contribution to the shortage of skills in the transport and built environment sectors, in order to advance the AsgiSA that is currently being driven by the Presidency.
As legend has it, the Archimedes screw, the first ever mechanical pump, as invented by the Greek mathematician Archimedes in the 3rd century BC, was initially developed to remove bilge water from ships. However, it was also deployed as a means of transferring water from a low-lying body of water into an irrigation canal. Perhaps most famous of all was its use in the Hanging Gardens of Babylon.
Just a short trip away, approximately 150km east of Johannesburg, is the strategic town of Secunda. It is not strategic because it is the heart and administrative capital of the Govan Mbeki Municipality, but rather it is the petrochemical capital of South Africa, with its SASOL II and SASOL III complexes. By design, the Govan Mbeki Municipality has the largest underground coal mining complex in the world. Over and above this, the municipality boasts a number of significant gold mines, and has 75% of Eskom's base-load power stations situated within its borders. Perhaps the word strategic is an understatement.
Pumps are required to move fluids within a system of piping against the respective total friction head of that pipe system - a typical example being a forced circulation system such as a central heating installation. In the case of different liquid levels between system inlet and outlet the additional static head must also be overcome a typical example being water displacement to a higher level i.e. to fill and maintain a near constant level in a header tank.
The steel arch structures illustrate the innovative design and use of steel in a rockfall protection structure, as well as the unobtrusive aesthetic appearance achieved by using arched tubular members.