본 연구는 불탑 중 백제 말기 건립된 익산 미륵사지 석탑과 조선 중기 보은 법주사팔상 전과의 계통사적 구조체계의 상관성을 고찰한 것으로 다음과 같은 결론을 도출하였다. 첫째, 익산 미륵사지 구층석탑은 내부에 심초석(心礎石)이 설치된 것으로 보아 심주와 사천주가 코어구조체계(core structure system)인 누각형 탑파로 상층기둥의 위치에 따른 체감율이 큰 것으로 보아 퇴칸은 칸물림방식의 전각형이 채택된 절충형식이라는 추정이 가능하다. 둘째, 보은 법주사 팔상전은 목탑의 기본적인 구성요소인 옥심주와 사천주가 코어 구조 체계로 채용되고, 주변 협칸과 퇴칸은 전각형 칸물림방식의 중층구조기법을 부차적으로 채택하여 익산 미륵사지 석탑과 같은 계통의 체감율이 큰 특징의 절충형 목탑이라고 할 수 있다. 셋째, 백제시대 불탑구조는 누각형(평좌층식, 포구조식)과 누각형에 전각형을 채택한 절충형으로 대별된다. 불탑은 필요에 따라 탑신의 높낮이를 비례적으로 조절하여 완성미를 높였으며, 처마길이를 충분히 확보함으로써 건축물의 볼륨감(massing)이 풍부한 기능성이 강한 건축물을 축조하였다. 넷째, 백제시대에 창안된 새로운 불탑형식으로서의 절충양식은 백제 말기에 시원하여 문화통치기인 통일신라시대와 지방문화를 정책적으로 장려한 고려시대를 거쳐 조선 중기 보은 법주사 팔상전으로 끊임없이 이어져 계승된 백제 고유의 불탑양식이라고 할 수 있다.

As the corner of wooden pagoda forms the roof by closely bordering left and right eaves on the various purlins and angle rafters, it is designed for every face to be recognized as front whose structure system increases load to bear proportionally. The corner of wooden pagoda is inseparable with the corner bracket set as it becomes stable thanks to the corner bracket set structurally and load burden under restrained structure makes the corner bracket set really important. Accordingly, this study could figure out some facts by analyzing corner bracket sets of Palsangjeon of Beobjusa Temple in Korea, Seokgatap of Bulgungsa Temple in China and Ojungtap of Beobryungsa Temple in Japan which were constructed with pure wooden structure. This study demonstrated that corner bracket set played a pivotal role in keeping balance of concentrated load of corner (corner of opening) in each floor that contributed to the stability of wooden pagoda structurally despite multiple duplications of floors and also figured out the outfit of corner bracket set was subject to the floor type and the cross section of Gongpo installed on top of Pyeongju. Wooden pagodas in 3 countries were two floor types of octagon and square, and employed different connection method between upper and lower floors. The difference between floor and duplication method determines the method of corner, but even different methods were sufficient to have entirety in every side by completing dynamic principle of corner bracket set even though old method had to solve the problem of concentrated load and it also confirms that it was essential Gongpo to prevent any deformation of corner.

The Wooden Stupa of Hwangnyongsa Temple, existed from Shilla to Koryo Dynasty, is recognized as a typical model of the Korean wooden stupa. The related records on this stupa are found in some historical documents including The Chronicles of the Three States (『三國史記』). This study, through the interpretation of these documents, attempts to discuss and analyse design and structural methods of the stupa, viz., i) the relationship with both Chinese and Japanese wooden stupa, ii) the height, iii) each floor's linking methods, iv) the 'Noban' (Basement of the upper part), v) structure of the 'Simju' (Central pillar) and vi) the stairs and the handrails. The results of this study would be hopefully used for the further researches as well as the restoration of this precious architectural asset.