Project: Electricity Tower Concrete Coping Replacement – Condition Survey & Replacement
The concrete copings encasing the steel legs of an electricity pylon form the important weather protection to the pylon steelwork between ground level and the pylon foundation. These copings deteriorate with age at a rate dependent on factors such as the prevailing weather conditions, ground conditions, and the regularity of maintenance (painting).
If these coping deteriorate or have not been constructed correctly in the first place they can allow water ingress and corrosion of the steel legs below ground thereby potentially affecting the pylon’s structural stability.
The extent of these concrete copings condition was not quantifiable across various overhead line routes until a full photographic survey and condition report was undertaken.
Utilizing the gathered survey information electricity towers with the concrete copings in the worst condition were identified. The Client commissioned the removal and reinstatement of concrete copings to over 200 towers. These works were undertaken by FlameOut to a specification that included a 15 year warranty.
All of the coping replacement works were completed to programme with a complete digital record being made of the original condition, works undertaken, and finished condition for each individual coping.
Whilst undertaking these works and replacing the existing concrete copings a number of tower installation and corrosion defects were identified, and these were also rectified by FlameOut.