Azuchi Castle was located on a small mountain on the eastern shores of Lake Biwa. This study seeks to clarify the limits of knowledge regarding Azuchi Castle (Azuchi-jō) and, in turn, offers a multifaceted interpretation of its crowning glory―the six-story, lavishly decorated, timber-framed tower known as a tenshu (donjon). This study proposes a few mitigation suggestions and recommendations to reduce the future damages by providing the strong support string, gable end stiffener, bracing and providing sand bags (10-20kgs) over the roof cladding to prevent the uplift. From this study, it is concluded that most of the rural home roofs in Bhutan are vulnerable to strong wind and past windstorm damage reveal that most roof failed due to poor connections of roof-to-wall, inadequate timber section and pull through failure of cladding during the strong wind. In this study, roof type, roof overhang, anchorage, roof-to-wall connection and support string verse damage is assessed using the survey data of four districts in Bhutan and reports of the roof damages. The study is mainly carried out to assess the windstorm damage on the rural home roofs in Bhutan based on the above mentioned category comparing with the Japanese roof structures. In this study, the rural home roofs in Bhutan and Japan are studied based on the roofs configuration, shape, slope, size, overhang, connection, support and roofing material used. The past windstorm damages reveal that the rural home roofs are more vulnerable to strong winds given the nature of rural home construction in Bhutan. During 20 windstorms, 24 rural home roofs were damaged respectively and caused huge economy loss to the government. Windstorms have become more frequent and widespread hazards in recent years in Bhutan. The oldest building date from the beginning of the Edo period (1600-1868) and the newest date from before the Second World War. This survey includes several residences and shrines from all over Japan. The buildings were selected by the complexity of the roof consequently each of the buildings has a roof composed of a minimum of two ridgepoles. The information is based on the Cultural Important Property Restoration Reports (重要文化財修理報告書) and the 7 volumes about Japanese traditional houses edited by Gaken ( 日本の民家、全7巻 1981 学習研究社). For this analysis 110 buildings were selected. We will identify how the different types of spaces are expressed in the roof design. Then by comparing the floor plan to the roof plan we will analyze the relation between spatial organization of the floor plan and the roof form. Later we will study the building types that exist in Japanese traditional architecture and how these building types and their roof forms have evolved historically. The purpose of this study is to analyze the typology and the composition of the roofs in Japanese traditional architecture.Initially we will see which are the basic roof forms, roofing materials and roof trusses normally used in Japanese traditional architecture.
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