The piles were manufactured from S355 J0H steel to BS
EN 10210-2 [21] which specifies that a 10% variation in wall thickness is acceptable. Some 5 months after practical completion, visible evidence of corrosion was noticed during times of low water. An investigation was therefore commissioned by the owners into the cause of the observed corrosion which differed in appearance from the uniform corrosion observed on other parts of the marina piling