A dapo type bracket system which consists of chuganpo(柱間包) and chusangpo(柱上包) with a fake-beam adopted a nemok-dori member to cope with oemok-dori member in order to obtain balance between the outer-side and the inner-side of the bracket system. The middle part of the longest rater in the dapo system is supported by three points made by oemok-dori, jusim-dori and nemok-dori members and the area between the rafer supporting points forms a supporting area. The increase of rafter supporting points and supporting area leads to heightening the structural stability and the efficiency of load delivery. In the eave of dapo system the portion where the three supporting points formed by oemok-dori, jusim-dori and nemok-dori members shows as 33% in the early period, 71% in the middle period and 78% in the later period. On the contrary the portion where more than one of the three dori members were omitted shows as 67% in the early period, 29% in the middle period and 22% in the later period. This is the result of the increase of the number and the distance of steps in the dapo bracket system as time goes on. This is because the structural role of three supporting points becomes important as the increase of distance between the dori members leads to the increase of load which burdens on each dori member.

Abstract
1. 서 론
    1.1 연구의 배경
    1.2 연구대상 및 방법
2. 내목도리의 발생
    2.1 주심포계 건축
    2.2 다포계 건축
3. 내목도리의 시대적 변화
    3-1 처마부 도리배치 유형
    3-2. 다포계 초기의 내목도리
    3-3. 다포계 중기의 내목도리
    3-4. 다포계 후기의 내목도리
    3-5. 다포계 내목도리의 변천
4. 맺음말
참고문헌

• 허경도(경북대학교 건축학과 대학원) | Heo Kyoung-Do
• 정명섭(경북대학교 건축학부) | Chung Myung-Sup