In Japan, there is Article 73 of the Building Standards act enforcement order and Article 4 of the Ministry of Land, Infrastructure, Transport and Tourism Notification No. 594, which stipulates that the reinforcement of the column heads on the top floor must be secured with column main reinforcement hooks or mechanically fixed. Therefore, this report summarized the results of a questionnaire survey of reinforcement contractors to clarify the actual state of reinforcement arrangement in capital in top floor.
