Janka hardness test Janka hardness test The Janka hardness test (from the Austrian-born emigrant Gabriel Janka, 1864-1932) measures the resistance of a sample of wood to denting and wear. It measures the force required to embed an diameter steel ball halfway into a sample of wood. A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring. The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the grain, is said to be of "side hardness". Testing the cut surface of a stump is
Carlo Janka Cup overall title. He clinched the title by winning the downhill and giant slalom, which left his nearest opponent, Benjamin Raich, 106 points back with one race remaining, an insurmountable margin. In October 2010, Janka was awarded the Skieur d'Or Award by members of the International Association of Ski Journalists for his performances during the previous season, thereby becoming the first Swiss male skier to receive the honour since Pirmin Zurbriggen won it back in 1990. Following the 2011 World Championships, Janka underwent surgery due to increased symptoms from heart arrhythmias. A radio frequency catheter intervention was done on 23