Recently, water surface floating solar power system are few appeared some companies in the country. However, it is the reality of most structures using steel and the problem’s occurred in durability for error of design issues and corrosion. In order to solve these problems, research is being conducted for various materials but performance verification is insufficient. In this study, in order to predict the structural behavior of water surface floating solar power structure and to confirm the safety, it tried to understand the mechanical properties of PFRP, synthetic wood instead of steel.