In this study, I would like to inquire about the composition of oegi(外機) on the hip and gable roof. Oegi purlin compose the basic member of framework of a hip and gable roof in both sides roof, supporting the inside end of the side rafter. However, the oegi purlin is not simply used to form hip and gable roof. The effects of using oegi purlin have the advantages of spatial. The spatial advantages are the width of the toekan(退間) increases as the oegi purlin escapes from column row and to increase the ceiling height by becoming a point of staying the ceiling. That reflect the desire to expand indoor space due to changes in worship behavior. Oegi purlin was used not only for structural needs, but also for altering in indoor space due to the changing times.

Abstract
1. 서 론
    1-1. 연구의 배경과 목적
    1-2. 기존연구
    1-3. 연구대상과 방법
2. 불전의 지붕형태와 외기도리의 변천
    2-1. 불전의 지붕형태
    2-2. 사례를 통해 본 팔작지붕 가구구조
    2-3. 외기도리의 변천
3. 외기도리의 공간적 이점
    3-1. 퇴칸 간살이의 증가
    3-2. 천장높이의 증가
4. 결 론
참고문헌

• 박새암(명지대학교 건축학과) | Park Sae-am Corresponding Author
• 한지만(명지대학교 건축학과) | Han Ji-man