13½/3 Corrugated is a sinusoidal profile. It is the traditional profile that most people think about when they talk of “corrugated iron” or “wriggly tin.” The 13½/3 corrugated sheet has a depth of ¾”, a cover width of 3’3” and is extreme easy to install. The profile is mostly used agricultural buildings but can also be utilised on commercial and industrial projects.