There were lots of changes of the wooden structure in the middle of Joseon Dynasty. It was the time of replacement from Jusimpo (simple bracket system) to Ikgong (wing-like bracket system) and each bracket had shown mutual variation as well as itself. The aspects of change were discovered that the decorative elements of Ikgong and Dapo (multi-bracket system) had accepted from each other. It was clearly shown that not only the Ungung (carved cloud-shape) and Chotgaji (shape of the acuminate leaf) of Ikgong had affected to Dapo, but also Gaang (pseudo-pointing cantilever) of Dapo had affected to Ikgong. It was mostly found in the Buddhist architecture because there was the conservatization of ruling hierarchy as well as the active growth of Buddhist society.

Abstract
 1. 서 론
 2. 익공의 인식과 유래
 3 익공식 공포의 대두
 4. 다포식과 익공식 공포의 장식적 요소와 관계
 5. 조선중기의 공포의 새로운 모색
  5-1. 다포식 공포의 익공식 의장요소 수용
  5-2. 익공식 공포의 다포식 의장요소 수용
 6. 새로운 익공의 형성
 7. 변화의 배경
 8. 결 론
 참고문헌

• 홍병화(대한불교조계종 총무원 문화부 전통사찰전수조사연구실 책임연구원) | Hong, Byung-Hwa Corresponding Author