Vehicle roof structure and method for assembling the same

A method for assembling a vehicle roof structure including:

• an upper structure including a front header located on a front side of a vehicle, a rear header located on a rear side of a vehicle, a pair of side rails adapted to couple opposite ends of the front header in a vehicle width direction and couple opposite ends of the rear header in a vehicle width direction, and a cross member adapted to couple the pair of side rails in a vehicle width direction;
• and
• a roof panel fixed to the upper structure so as to close a space surrounded by the front header, the rear header, and the pair of side rails from above the cross member,
• the method comprising:
• forming a plurality of application portions having a mastic adhesive applied thereto on the cross member with a distance therebetween in a vehicle width direction;
• disposing the roof panel on the upper structure via the plurality of application portions so as to close the space surrounded by the front header, the rear header, and the pair of side rails from above the cross member from above the cross member;
• mechanically fixing the roof panel to the front header, the rear header, and the pair of side rails;
• and
• curing the mastic adhesive by heating the plurality of application portions together with the upper structure and the roof panel,
• wherein in the forming of the plurality of application portions, the plurality of application portions is formed such that among the plurality of application portions, a central application portion disposed at a center of the cross member in the vehicle width direction has a length that is shorter than a length of an end-side application portion disposed on opposite sides of the center in the vehicle width direction.