Groundline were engaged to provide on-site field engineering support including loading calculations, stringing methodology and quality assurance and control of the sagging process.
The tee-line consisted of a short section of 220kV double circuit steel monopoles that supported zebra ACSR conductor. The tee-off consisted of short steel poles that carried the circuits under the existing line configuration to allow connection into the tee-line.
Because the poles were steel, deflection meant that the original stringing methodology was cancelled. Groundline developed a new methodology that provided a more constructable option and allowed sagging to be carried out within the asset owner’s required timeframes.
Groundline carried out sagging of the tee-off, monitored termination pole deflections and loadings and also verfied construction works.