Tender For buildingconstruction and other forestry works - / , opc53 grade is 12269:1987 (standard bag weight 50 kg.), opc43 grade is 8112:1989 (standard bag weight 50 kg.), ppc53 grade is 1489:2015 (standard bag weight 50 kg.), ppc43 grade is 1489:2015 (standard bag weight 50 kg.)