Structural Plywood that complies too AS2269 is made from veneers that are known to conform to various ratings e.g.: F8 or F11.
This provides engineers and other parties a known standard to work to when the plywood will be used under load such as bracing or flooring.
Typically produced from Radiata Pine veneers, Structural Plywood is usually available in CD and DD grades. The C face will contain puttied knots and splits whilst the D back will have unfilled knots and splits.