Traditional Korean architecture and traditional ships maintained a close relationship with carpenters and tools because wood, the material, was common. This close relationship may have been from the time of ancient architecture and ancient ships. In previous studies, researchers proved the relationship between these two sides through historical records of traditional architecture and traditional ships. This study attempts to prove the structural association using existing remains. As a result, three structural similarities between traditional architecture and traditional ships could be found. First, the types of wood used are similar, and the tools and terms used are similar. Second, the method of distinguishing horizontal and vertical materials and the structure of wood and the method of forming wood are similar. Lastly, the ship carpenters mobilized for the construction of the palace mainly worked on long and curved materials such as the eaves and the ridge of a roof, because this was the work done when the ship was built. Therefore, it can be assumed that the roof structure they created resembles that of the ship.

This study covered the features and development process of the stylobate of the Sumijwa style, which emerged in Silla around the late 7th century. In the Period of North and South Dynasties, Sumijwa was used as the seat of the Buddha. It was used as a stylobate of tower in the Sui Dynasty and as a stylobate of central buildings in the Tang Dynasty, raising the status of buildings. In the late 7th century, Silla faithfully embodied Buddhist view of the world under its architecture by accepting the latest stylobate of the Sumijwa style. The pagoda of Hwangnyongsa Temple is believed to be the beginning of the stylobate of the Sumijwa style, in Silla. Gradually, in the central buildings within the capital, the stylobate of the Sumijwa style became common. Starting with Bulguksa Temple's Daeungjeon Hall, the materials of stylobate and staircaes will be integrated from the late 8th century. Silla's stylobate of the Sumijwa style can be evaluated as a step-by-step leap in religious, political, technical and aesthetic's terms.

The aim of this study is to examine the square shape cases of rafter end header with special reference to wooden architecture and Uigwe records. In Uigwe, the member Bangyeon is widely used in multiple Changung and Chansil, and it is the most used in various gates in the buildings. It is also found in Haenggak and Subokbang. In the surviving wooden architecture, Bangyeon is found in pavilion, colonnade and gate in Changdeokgung Palace, and it is often seen in palace architecture. It is rare in private sector, and it is shown in Sangju Yangjindang and Andong Songsojongtaek. A total of 48 cases in Uigwe, can found records of Bangyeon. According to the records, mainly Yeonggeon Uigwe and Salleung Uigwe, it can be found that gates, also Bangyeon was used.

In understranding the essence of the Korea traditional Architecture, it is important to consider the jointing methods of architectural members, architectural technologies, etc. Especially the purpose of this study is understanding on the Jointing Method of Wooden Members in the period of Unified Silla Architecture. It's conclusion is summarized as follows. 1. A section of column has very close to do with the foundation stone. The structures of foundation stone and column are generally concluded by butt joint, arrow-head joint, housed joint by Grang-e method. Judu is structured by arrow-head joint. And, in general, beam is structured by Sagaematchum Chumcha and sagaljudu of Dori direction. At the head of Pyungju and the body of Goju, Changbang is structed by Jangbumachum with arrow-head joint or by jumukchang- machum. Also, it is surmised that Gyisoseum and Anssolim methods had been applied to columns from former ages. The example can be found at Bagjae Mireuksaji stone pagoda. Bagjae Mireuksaji stone pagoda taking wooden-pagoda form adopts Gyisoseum and Anssolim methods. We can also find such a sort of methods from other stone constructions like Budo, etc. 2. Injahwaban is structured by short Changbumachum with arrowed-head joint at upper members, and by Anjangmachum at the lower part. This sort of Gongpo style can be seen in the mural painting of tomb of Koguryo and in Buplyungsa, Buplyunsa, Bupkisa-located in Japan, which are influenced by Bakjae or Unified Silla. It is considered that at the end of the late United Silla, Injawhaban had been replaced with Chumcha and Soro on the Pyungbang under influence of Dapo style from China.

The purpose of this study is to discover the characteristics and the change of the framed structure with triple beam. 61 existing buildings with the triple beam structure were selected and analyzed extensively. The result of this study could be described in detail like below. The triple beam structure is used in the highly graded and symbolized building like the Buddhist sanctum and the Confucian sanctum. And the triple beam structure was chiefly used in $1600{\sim}1800's$. Generally, 1 Koju-type with Toikan(退間) is applied to the triple beam structure. Despite of the sameness of framed structure, there is a tendency that the rear Toikan(後退間) is used in the Buddhist sanctum and the front Toikan(前退間) is used in the Confucian sanctum. This different application of the Toikan(退間) resulted from the different spatial characteristics which reflect function and grade of the building. The application of Sangjungdori(上中道里, upper purlin) and two Danyeon(短椽, short rafter) is a necessary consequence, because Jungbo(중보, middle beam) is located between Daebo(대보, beam) and Jongbo(종보, small and high located beam) as an additional member of frame. And these are essential characteristics of the framed structure with triple beam. The triple beam structure is formed in a transitional period, as the result from eliminating the inner high-column from the 2 Koju and double beam structure. Though the Daebo is longer, the structure is more stable. But the rate of application of the triple beam structure is low, because it does not exceed the double beam structure in merits. Some of buildings with the triple beam structure has the asymmetrical characteristic in design, which is appeared in the latter period of Joseon Dynasty.