The pendulum is now a standard test method for pedestrian slip resistance in 48 nations ( European Committee for Standardization EN 13036 - 4 , 2003 names many of them ) on four continents .
The pendulum has been endorsed by Ceramic Tile Institute of America since 2001 .
The pendulum is now a standard test method for pedestrian slip resistance in 48 nations ( European Committee for Standardization EN 13036 - 4 , 2003 names many of them ) on four continents and has been endorsed by Ceramic Tile Institute of America since 2001 .