Ukuqonda i-Lifecycle of Prestressed Metal Duct Ethebula Lokwakha Okuqukethwe 1. Isingeniso Sezinsimbi Ezibekiwe 2. Isigaba Sokwakhiwa Kwezinsimbi Ezibekiwe Izinsimbi 3. Inqubo Yokukhiqiza Yachazwa 4. Inqubo Yokufaka Yokusebenza Okusebenzayo 5. Ukuhlaziywa Kobude 6. Ukuhlaziywa Kwempilo Nokucatshangelwa Kokusimamisa 7. I-Ch