San-ja is one of the main members consisting of the roof of traditional wooden buildings in Korea. In this study, the regional characteristics of the materials used in San-ja and changes of the materials over time were examined. To this end, 123 documents on the repair of wooden architectural heritage recorded since the 1950s were reviewed. It was found that there was a difference in the San-ja material by region because of the diversity in the conditions of material supply. For instance, bamboo was the most frequently used material in Jeollanam-do province because it was readily available. However, with the development of transportation and vehicle, the regional characteristics have disappeared. As a result, the material has been unified with bamboo now. This is because bamboo is specified as a representative material in the specification or the convenience of construction is prioritized. In addition, the social and economic conditions at the time of repair had an influence on the selection of the San-ja materials.

Abstract
1. 서론
2. 산자 및 산자엮기 일반사항
    2-1. 산자 및 산자엮기
    2-2. 산자 재료별 특징
3. 목조 건축문화재 산자 재료의 지역별 특성및 수리 시기별 변화
    3-1. 목조 건축문화재 산자 재료의 지역별 특성
    3-2. 목조 건축문화재 수리 시기별 산자 재료의 변화
4. 결론
참고문헌

• 박새미(한국전통문화대학교 문화재수리기술학과) | Park Sae-mi
• 장헌덕(한국전통문화대학교 문화재수리기술학과) | Chang Hun-Duck
• 권양희(한국전통문화대학교 문화재수리기술학과) | Kwon Yang-hee Corresponding author