Abstract
This paper presents a statistical analysis of the annual extreme ground snow weights and depths measured at 12 observation spots located in heavy snow district of Japan. The analysis shows that type I, type III and normal distributions are adequate to describe the annual extreme ground snow weights and depths. There exists an obvious linear relation between the mean recurrence interval value of the extreme snow depths (H_<MRI> (cm)) and that of the extreme snow weights (W_<MRI> (kgf/m^2)) for the mean recurrence interval, MRI=10, 30, 50 and 100 years. The relationship can be seen that W_<MRI> = 3.5 H_<MRI> for three above mentioned distributions. The assessment of design snow load may be improved by using the statistical treatment of the annual extreme snow depths and the equation proposed in this paper.
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