| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a steel structure provided with a framework having straight parts and a curved part by using a bar steel, which is easily executed and provided with a necessary strength. SOLUTION: A bend-processed material 4A formed of a linear bar steel by bending is used to form a bent between bar steels 2, 3 used in a straight state. The sectional area of the bar steel used for bend-processing is formed larger than the bar steels 2, 3 to attach a bend-processed material 4A with a sectional area mergin and form a strengthened bent.
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