Western style timber roof trusses used as typical roof structures of buildings during a modern period have been developed with the interactions with their facade and functionality. The shapes of trusses and member sizes have been diversely changed by the purposes of architects, historical circumstances, and structural characteristics. For this reason, the change in the shapes of western style timber trusses along the times is one of important technology assets demonstrating the development of their structures during the modern period. Therefore, the purpose of this paper is to find out their structural characteristics throughout parametric analysis of which parameters were determined from the collected and classified documents on western style timber roof structure built in the modern period carefully obtained from public institutions. Results of the parametric analysis are as follows. The number of king-post trusses and modified king-post trusses built between 1920 and 1937 reaches almost half of the total number of truss types investigated. The mean values of their spans, distances, tributary areas, and height are respectively, 10.5m, 2.4m, 24.37㎡ and 3.24m. The cross-section areas of trusses tend to reduce since the city construction law was enacted in 1920. Also, this study found that western architects usually used larger structural members than eastern architects and usages and finishing materials of roof trusses are not always considered as one of the important design parameters.

1. 서론
    1-1. 연구의 배경 및 목적
    1-2. 연구의 범위
    1-3. 트러스의 유형분류
2. 트러스의 구조 및 부재의 분석
    2-1. 트러스의 간사이
    2-2. 트러스의 간격
    2-3. 트러스의 분담면적
    2-4. 트러스의 높이
    2-5. 트러스의 주요 부재단면적
3. 기타 요인에 의한 트러스 구조분석
    3-1. 설계자에 따른 특성분석
    3-2. 용도에 따른 분석
    3-3. 지붕마감 재료
4. 결론
참고문헌
Abstract

• 이윤희(공주대학교 건축공학과 박사과정) | Lee Yoon-Hee (Ph.D Student, Kongju National University)
• 유혜란(서울시립대학교 건축공학과 박사수료) | Yu Hye-Ran (Ph.D Candidate, University of Seoul)
• 권기혁(서울시립대학교 건축학부 교수) | Kwon Ki-Hyuk (Professor, University of Seoul) Corresponding author