ABSTRACT
The specific exposure condition of the structure is rarely further considered. The structure type and specification can be too new for significant degradation to be observed or measured in comparable circumstances. Generally, the most helpful information is case histories of similar structures which have been repaired to help them achieve at least a proportion of their design life. To the best of the author’s knowledge no reinforced concrete structure has been clad with stainless steel sheeting as a corrosion protection system. Perhaps the most significant concern was the active corrosion of the steel in the reinforced concrete bents and shear walls which support the spans. Certain categories of civil engineering have taken durability much more seriously than most of the industry where the structure is to be placed in a known hostile corrosion environment. The immersed tube tunnel outside is corrosion-engineered so no chloride penetration into the concrete will occur for the first 60 years.
