| 摘要 |
A head member structure of the present invention comprises an upper member (10) of a reverse U shape; a lower member (20) of a U shape; and a web member structure where rounding portions of two semicircle members (2) having two wings (31, 32) face each other. A beam structure is formed as the upper member, the lower member, and the web are coupled. In the beam structure, punched hole portions (16, 17) are formed such that a web can be coupled with the both sides of the head member, and punched hole portions (14, 24) for coupling with the head member are formed on both wing edges (31, 32) of the web. A punched hole portion (35) is formed on the center of the semicircle member for resisting against buckling. In addition, the punched hole portions (14, 24) of the both wing sides of the web are coupled with the punched hole portions (16, 17) of the sides of the upper and the lower members as the back of the web (30) faces the upper member (10) and the lower member (20). A bolt (50) penetrates the punched hole portion (35) formed at the center of the web, and nuts (51) are fastened to prevent the web from being moved, and thus resistance against buckling load can be made. |
