Pillars: Twelve pillars made of fir, each ten to 12 meters high, are distributed six on each side and set against each other at a slant two meters into the ground. They form a secure foundation for the platform above.
＊孤柱：12 支，為 10-12 公尺高的杉木，左右各 6 根，對立斜插深入地下近 2 公尺，形成穩固的基礎，上面再搭起孤棚平台。