The Great south gate of Seoul Castle, Sung-Rye-Mun, the east gate of Seoul Castle, Hung-In-Ji-Mun, the south gate of Hwa-Sung Castle, Pal-Dal-Mun and the north gate of Hwa-Sung Castle, Jang-An-Mun are typical significant castle gate of Chosun Dynasty. They have a lot in common with exterior. Additionally there are also something common in dimensions. At first, the arch dimensions of lower story is very similar and the columns of upper story are the regular intervals. Purpose of this study is to confirm similarities above mentioned were intended on purpose and if then what was the reason. The results of this study were described separately as follows. 1. The widths of the arches were based on each 16Cheok and 18Cheok. 2. The heights of the arches followed less strictly rule than the widths. 3. The widths of the arches, 16Cheok was same size as width of middle-size road (中路, Jung-Ro) inside the Castle town in Chosun Dynasty. 4. The widths of the arches, 16Cheok was the standard size of exit went through castle and then the standard size of road arrived at one's destination. 5. The widths of the arches had an effect on the intervals between the columns of the upper story. Finally we recognized that in Chosŏn Dynasty the widths of the gate arches in Seoul castle and Hwa-Sung castle had relevance to the city planning largely and widths of the gate arches had an effect on the intervals between the columns of the upper story partly.

1. 서론
    1-1. 연구의 배경 및 목적
    1-2. 연구의 범위와 방법
2. 연구를 위한 이해
    2-1. 城門
    2-2. 下部石築과 上部門樓
3. 홍예 치수 분석
    3-1. 八達門홍예 치수
    3-2. 八達門과 崇禮門·興仁之門비교
4. 門樓柱間거리 비교
    4-1. 八達門柱間거리
    4-2. 八達門과 崇禮門·興仁之門비교
5. 홍예 크기와 주간 거리 분석
    5-1. 홍예 너비가 16尺인 이유
    5-2. 홍예너비가 건물에 미친 영향
6. 결론
참고문헌
Abstract

• 류성룡(고려대학교 건축학과 겸임교수) | Ryoo Seong Lyong (Adjunct Professor, Korea University)