To provide the technical data for snow removal reduction on detached houses in cold and snow region, the authors investigated the snow sedimentation area for snow removal in Takasu Town of Hokkaido. The several factors to influence the snow sedimentation area were analyzed. The following results were obtained through the investigation and analysis:
1) The snow sedimentation area for snow removal decreased with the routine snow removal area and roof snow fall area increase. The snow sedimentation area in oblong area was large in comparison with the lengthwise area.
2) In the area that exterior structures was built, the snow sedimentation area decreased by the routine snow removal area decrease. In the area that gable roof was built, the snow sedimentation area decreased by roof snow fall.
3) The snow sedimentation area was limited by roof snow fall. And all snow sedimentation area was not available by the partial area. Therefore, the necessity of snow removal planning around approach in detached houses was clarified.
