Abstract
Present state, existing problems and future ideal of decision process of design load, especially of snow load, are considered in relation to social situations, natural conditions and their evaluation methods. We proposed the idea that social ripeness such as population increase rate, average span of life, spread level of education, accumulation of social capital, social demand for maintenance of environment etc. would be a good index in load decision procedure for the social demand level of structural safety.
For the purpose of spreading the load and resistance factor design (LRFD), we have agreed that formulating a system that designers and owners have the opinion in the level of structural safety would be effective and convenient. For making this "menu", the importance of research and observation of snow load has suggested. with several indispensable factors for decision of design snow load.
