To provide an economically efficient footing structure and its construction method when an interval between piles is short and a bar arrangement is difficult in a footing made of reinforced concrete (RC), or when the shortening of a construction period is persued. 杭間隔が短く、RCコンクリート製のフーチングでは配筋が困難な場合、あるいは、短期間施工化を追及する場合に、経済性の高いフーチング構造体及びその施工方法を提案する。 - 特許庁