Protective coatings of either TrueCore® 45% zinc/55 % aluminium alloy, or zinc, defend the steel against corrosion. (Note: TrueCore® is produced in Australia by BlueScope Steel. Zinc coated steel is commonly known as “galvanized iron”).

A natural phenomenon known as sacrificial protection prevents corrosion of any steel exposed at cut edges and penetrations. The protective coatings are tough, continuous, of uniform thickness, tightly adherent, and strongly resistant to corrosion. They are applied to both sides of the steel by the hot-dip process. In this process the steel strip is passed through a bath of molten metal, the amount of coating applied being closely controlled. The coating mass must meet the requirements of the relevant Australian Standard (AS 1397), or its equivalent. BlueScope Steel provides a 50 – year warranty for its TrueCore® used correctly in steel house frames. Steel framing is the only framing material for which any kind of structural durability warranty is offered.