Xinbian Luban Yingzao Zhengshi was written by craftsmen during the Yuan Dynasty (A.D1271-A.D 1368). The present study suggested that two “divination rulers” were used to design constructions, gates and doors. One was called the “Luban Ruler”, and another was the “Yabai Ruler”. This study clarified the relationship between the two rulers and measurements of the houses, gates and doors, which were written in this book.
