摘要 |
<P>PROBLEM TO BE SOLVED: To safely and conveniently perform construction by fastening an opposite bolt of a channel shape joint metal in which a shape steel joint is formed in a C shape, and to easily check fastening torque, in a heavy construction joint of a heavy construction structure. <P>SOLUTION: In the joint checking method in a joint metal of a heavy construction structure: a bolt 4 is screwed from the outside on at least one side of inner opposition surfaces 3 and 3' of a steel material insertion channel 2 formed on a joint body 1 through the one-side inner opposition surface 3 toward the other side inner opposite surface 3'; a receiving implement 6 opposite to a tip 5 of the bolt 4 is arranged on a common center line c on the other side inner opposite surface 3'; a female screw 9 sharing the center line c is recessed on a head 8 of the bolt 4; and a male screw 4' is screwed to the female screw 9. In the joint checking method, a bending washer 10 is interposed between the head 8 and a head 7 of the male screw 4', and the fastening state of insertion steel materials 11 and 11 in the channel is confirmed when a flat shape of the bending washer 10 achieved by fastening the male screw 9 is confirmed visually. <P>COPYRIGHT: (C)2013,JPO&INPIT |