Tower Inspections: Thames Crossing
Set on the North and South bank of the River Thames, and directly east of the city of London, the Thames Crossing towers are part of National Grid's electricity transmission system. The structures, which are over 600 ft tall, were built in 1961 and are painted, galvanized steel lattice towers.
Although the area surrounding the towers is now relatively open, there is evidence that the area was once considerably more industrial, with a power station, cement works and freight terminal close by. The historical impact of these industrial activities and the on-going corrosion caused by the atmosphere has the effect of degrading the metallic structure.
CAPCIS provided a team, trained to work at heights and capable of characterising the degradation patterns and corrosion damage across the sample bars. The team assessed the current condition of the towers and were able to make predictions regarding the future rate of corrosion. An analysis of the former paint system was provided and engineers were able to make recommendations regarding the future maintenance strategy.
Other projects include inspection of a representative number of towers along a whole route.
|
