Abstract
The purpose of this study is to investigate sunlight environment according to block layout pattern and distance in the flat-type and tower-type apartment housing. For this study, 3D sunlight simulation was performed by Sanalyst program for the perpendicular, oblique line and square apartment complex arranged when the distance is changed to 1.0H, 0.7H and 0.5H. From the results of the simulation, the farther distance have a higher percentage of sunshine duration in the case of distance and the square pattern have a higher percentage of sunshine duration in the case of block layout pattern.