220 KVA Electrical Pilon
Wilkie Civil Engineering (Wilkie) was approached by the sports master of the Armadale Christian College to convert a 220 kVA electrical pylon into an abseiling tower.
Wilkie first checked the materials that were available and took measurements. The tower was approximately 15 m tall. Compressed fibre sheets were selected to cover the steel tower. The footings were a combination of 2m square x 0.5m deep pad and anchor bolts drilled in lateritic rock for each column to reduce the required blasting which with a traditional footing required a depth of 2.2m and 2.6m square excavation of rock. Three separate abseiling walls of varying heights were designed and constructed around the tower for the varying abseiling skill levels with a platform at 9m, 17m & 29m.