This standard specifies the classification and marking, requirements, inspection methods, inspection rules and marking, Encasement, transportation and storage of Wood Plastic Composite panels for building formwork. Wood Plastic Composite panels for building formwork suitable for extrusion process and molding process manufacturing. Products are divided into Wood Plastic Composite panels for hollow core building formwork (K) and Wood Plastic Composite panels for solid core building formwork (S). Solid core panels are divided into categories I, II and III according to strength. Common specifications are 915mm × 1830mm and 1220mm × 2440mm, with thicknesses ranging from 8mm to 25mm. Miscellaneous dimensions are agreed upon by both the supplier and the buyer.