A vehicle body structure comprises body side panels each comprising a roof mounting surface, a roof panel having opposing sides, and a brazed joint attaching the roof panel to the body side panels along a line of contact. The roof panel comprises a raised bead portion on each side of a central portion, character lines having sloped surfaces extending downward from each raised bead portion to the central portion, and a side mounting flange at each side of the roof panel that curls under the raised bead portions. Each side mounting flange has a line of contact with a corresponding roof mounting surface.