An automated weather-unaffected building system has been developed which is aimed at creating a system for producing an attractive building system for the next generation. This system makes improvements with regards to problems pertaining to labor productivity, and creates a comfortable production environment for the new type of engineers of the future. It can provide high quality building at a low cost. This system is based on the procedure that after the uppermost floor of the building is assembled on the ground level, various automated mechanical devices necessary for structural work are installed. The structural body of the building is constructed one floor at a time and each part in sequence under weather proof working conditions. Each is raised to the uppermost floor by means of a jack system. This paper reports the summary and execution of the above automated weather-unaffected building construction system. PREFACE An automated weather-unaffected building construction system has been developed, which aims at creating an attractive building production system for the next generation that can construct a high quality building at a low cost. A group with the objective of developing the automated weather-unaffected building construction system was organized in 1991. A period of 2 years passed from 1993 to 1994 for the period of examination and planning of the system. Then a mock-up model was assembled and basic experiments were conducted to verify the performance

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