MONOPOLE MASTS
Power transmission and distribution project in Ethiopia A case study for self-supported monopole masts
The ongoing project forms part of a large-scale electricity infrastructure upgrade for Ethiopia and focuses on the transmission and distribution of electricity from various substations to surrounding areas of Addis Ababa. These distribution networks convey electricity with high voltages from 132 kV up to 230 kV and span through tough terrains, city centres and densely populated informal settlements. Structa Group, through its subsidiary, Structa Konsult, was contracted to carry outdata collection, survey, design conceptualisation, detail designs, complete and sign manufacturing drawings, manufacture, and deliver of the masts. The project was a milestone as it was the first time the client considered using these sizable self-supported monopole masts in a high voltage transmission application. According to Erasmus Cilliers, a senior mechanical engineer of Structa Group, initially, the client thought that it would be a big gamble to switch from the ‘tried and tested’ lattice-type pylon structures to large monopoles. However, the client thrust a spot of bother of sorts – with the lattice-type pylon structures, The masts manufactured for these lines were some of the biggest masts ever manufactured by Structa.
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STRUCTA technology
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20
CR | May-June 2020
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