This study investigates the types and spread of framed structures of gable roofs meeting at right angle showed in old architecture and documentary paintings of houses, which were well liked in the early Joseon Dynasty. The conclusions of this study were as follows. First, the framed structure of gable roof meeting at right angle can be divided or recognized in 4 types according to their structure’s size and purlin’s position. Three of those types were noted to be in Seoul. Second, the framed structure of gable roofs meeting at right angle begun from the awareness of their independence from one another. Each space was divided based on their functions. Therefore, it could be extended in various forms, not only in the square plan physique but also in many different forms. And allowed free plan configuration regardless of column layouts or size of structure. Third, 5 purlins and 3 purlins crossing structure were preferred in Han-yang, the early Joseon Dynasty. It is related to the specific construction conditions of urban houses, such as the slope of land, limited land area, and economic power. Fourth, urban housing techniques were diffused throughout the country by officials who lived in Kae-gyeong and Han-yang at the end of Goryeo and early Joseon Dynasty. In other regions, framed structure of gable roof meeting at right angle households decreased, but in some regions of Gyeongsang-province, framed structure of gable roof meeting at right angle has maintained with Staggered purlin.

This study investigates how the spatial recognition structure is emerging through the case of rectangular plan combined with a combination of Dang-Sil(堂室) and Gong(工) shape roof, and identifies a type of architecture in the early Joseon Dynasty that has never been revealed. The conclusion of this study is as follows. First, the Dang and the Sil are connected to each other, but the architectural elements such as pillars, frame, and windows are distinguished and appear as separate buildings. Second, the distinction between Dang and Sil is evident by the difference in the number of ridges and the shape of the roof. In addition, the roof and roof framework of the independent rooms and the rooms were common in the right angled architecture where the direction and the expandability of each structure were maintained. Third, the construction of the Dang-Sil combined structure, in which two or more structure frameworks were combined with the rectangular combined flat roof structure, gradually changed into a single structure with a single ridge. Fourth, this change means that people of the early Joseon Dynasty recognized the Dang and Sil as separate architecture, but the strict sense of spatial separation has disappeared over time.