Column-leaning Displacement of Korean Traditional Wooden Architecture : 3D Scanning Data of Columns of Sungryeoljeon in Namhansanseong

Column leaning in Korean traditional wooden heritage structures has been emphasized in various reports since the first survey report in the 1950s, which established the importance of its measurement. Manual measurements have been carried out for a long time; however, recently, three-dimensional (3D) scanning has been used to obtain accurate data. Through periodic surveys of column leaning using 3D scanning, column displacement can be measured accurately.This study aims to measure the column leaning in Sungryeoljeon at Namhansanseong, a World Heritage Site, using 3D scanning, and then determine its displacement through a periodic survey. Such displacement in column leaning may reveal the characteristics of wooden architecture.The 12 columns of Sungryeoljeon are displaced in different directions. Generally, they lean toward the south and rotate clockwise. Column displacement does not occur so quickly in certain directions. Nonetheless, the aspects of column leaning that are already in progress need to be observed carefully.