THE SIZE OF PORTIONS (31P) THAT ARE INCLUDED IN JOINING DEPRESSIONS (31) AND DO NOT CONTRIBUTE TO JOINING IS REDUCED. A LAYERED BODY OF SHEET-LIKE MEMBERS (1) INCLUDES: A FIRST SHEET-LIKE MEMBER (11) THAT INCLUDES A PLURALITY OF THROUGH HOLES (12) HAVING A SAME LONGITUDINAL DIRECTION A SECOND SHEET-LIKE MEMBER (21) ON WHICH THE FIRST SHEET-LIKE MEMBER IS PLACED AND A PLURALITY OF JOINING DEPRESSIONS THAT ARE FORMED IN AT LEAST EITHER ONE OF THE FIRST SHEET-LIKE MEMBER AND THE SECOND SHEET-LIKE MEMBER, AND THAT JOINS THE FIRST SHEET-LIKE MEMBER AND THE SECOND SHEET-LIKE MEMBER TO EACH OTHER, A LONGITUDINAL DIRECTION OF EACH OF THE JOINING DEPRESSIONS SLANTING WITH RESPECT TO THE LONGITUDINAL DIRECTION OF THE THROUGH HOLES.
