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 February, interrupting accessory electrical pathways to the heart. These unnecessary extra pathways had caused his heart rate to behave abnormally during exercise and stress, posing possibly severe risks. Janka recovered well from the catheterization and resumed training five days later, winning the giant slalom at Kranjska Gora, Slovenia, on 5 March for his sole victory of the 2011 season. Janka switched equipment following the 2014 season, from Atomic to Rossignol. ^ Carlo Janka Carlo Janka (born 15 October 1986) is an alpine ski racer from Switzerland. Born in Obersaxen, in the canton of Graubünden, he had the winter sports facilities