In recent years, photovoltaic array frames have been damaged in the eastern Hokkaido region that are believed to be caused by frost heaving. Decreasing the load carrying capacity due to torsion of column is worried in the long-term service. In this study, outdoor frost heaving test were conducted using full scale specimen to grasp relationship between amount of frost heaving and steel member response. Result of study, deformation behavior of each member was determined during frost heaving. It was also clarified which member needed to be reinforced to ensure adequate rigidity based on load transmission path.
