‘Lu' is one of the Korean traditional building structure. The architectural characteristics of the ‘Lu’ can be classified two types with its use. One is single building type and the other is a part of building type within building complex. This study is about the two-storied 'Lu' that was built on part of building complex. 'Lu' built in building complex such like Sa-chal, Hyang-gyo, Seo-won, Jae-sil, has the similar characters .
1. It is built by taking slope site.
2. Ii is one of four buildings that forms court yard.
3. It uses simple building structure on the purpose of openness
4. It can control view with using window.
The column type of 'Lu' can be classified with 3 style. These are 5x2 Kan style, 3x2 Kan style and 5x3 Kan style. It would be assumed with the result of study that 5x2 Kan style has its origin in Hoe-Rang structure, 3x2 Kan style is originated from Joong-Moon(middle gate) structure, and 5x3 Kan is originated from Kang-Dang structure.