| 摘要 |
PROBLEM TO BE SOLVED: To improve the mutual load transmitting performance of a roof side rail and a center pillar. SOLUTION: Downward bending load applied to the roof side rail 1 is received as vertical buckling load by a vertical rib wall 7 in the closed cross section, so that the resistance of the roof side rail 1 is high, and moreover the downward bending load is received in the axial direction of the center pillar 9 by a shoulder part 12 and a plurality of vertical rib walls 13 of a pillar outer 10 of the center pillar 9 and efficiently dispersed and transmitted to the whole center pillar 9.
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