Аннотация:Evaluating roof snow load is an important problem for building design in snowy regions. A semi-full-scale building model was developed to obtain validation data for the model for evaluating roof snow load. The building model was placed in an observational field in Nagaoka City, where extensive weather conditions were measured. The seasonal change in the roof snow load was directly measured by a load cell installed between the pillars and beams. The water runoff from the roof was recorded at the drainpipe. The effectiveness of the measurement system was demonstrated with observation data from the winter of 2018–2019.