Elliottis shuttering plywood - multi-purpose. Our Basic Elliottis shuttering plywood designed for being used on site for shuttering purposes, can also be used for structural elements as this plywood is graded (Class 2). This product is more commonly used for hidden building work where the face is not as good a quality finish but is cheaper to use than other plywood options. (Other sheet material supplies available) What is Class 2 grading? Class 2. For humid conditions - protected external applications and damp internal uses (and must have limited exposure to moisture during construction).