This Standard describes the requirements for the manufacture and testing of medium and high-friction composite brake blocks to be installed on locomotives and rolling stock (locomotive hauled rolling stock, self-propelled passenger rolling stock, and infrastructure maintenance rolling stock).

The purpose of this Standard is to ensure that brake blocks fitted to locomotives and rolling stock provide reliable and consistent friction to the wheels to slow or stop vehicles within required distances without causing damage between the brake block and wheel and between the wheel and the rail.