αw = 0.05 / NRC = 0.05

αw = 0.70 / NRC = 0.65

αw = 0.70 / NRC = 0.70

αw = 0.75 / NRC = 0.70

αw = 0.55 / NRC = 0.55

αw = 0.80 / NRC = bis zu 0.75