| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot-rolled linear shape steel having an excellent junction fatigue characteristic capable of keeping a sufficient fatigue life even in the repetitive load environment of a JES construction method structure. SOLUTION: This hot-rolled linear shape steel has a connecting piece 2 comprising a main pawl 2A and an auxiliary pawl 2B at the width end of a web W. The connecting piece has a size shape including auxiliary pawl thickness; 16 mm or above, auxiliary pawl R (radius of curvature of auxiliary pawl inner face); 10 mm or above, joint height; 78-86 mm, opening section width: 15 mm or above. |
