Vehicle floor structure

A vehicle floor structure that includes a rocker disposed at a lateral portion of a vehicle floor surface and extending in a longitudinal direction of the vehicle, the vehicle floor structure comprising:

• a floor crossmember that extends in a lateral direction of the vehicle and that is disposed inward of the rocker in the lateral direction of the vehicle, wherein the floor crossmember extends to a lateral center position of the vehicle floor surface beyond an intermediate position between the lateral center position of the vehicle floor surface and the lateral portion of the vehicle floor surface;
• and
• a fragile portion is formed in the floor crossmember at a position closer to the lateral center position of the vehicle floor surface than the lateral portion of the vehicle floor surface, wherein
• an arch is formed along a lower edge of the floor crossmember;
• and
• the arch assumes such a shape as to increase in distance from the vehicle floor surface with increase in distance from the joint between the vehicle floor surface and the floor crossmember.

A vehicle floor structure that includes a rocker disposed at a lateral portion of a vehicle floor surface and extending in a longitudinal direction of the vehicle, and a center pillar provided above the rocker, the vehicle floor structure comprising:

• a plurality of floor crossmembers that are disposed inward of the rocker and extend in a lateral direction of the vehicle, wherein a central floor crossmember, which is the floor crossmember of the plurality of floor crossmembers, is disposed at a position close to the center pillar;
• and
• a joint between the central floor member and the vehicle floor surface is shorter in the lateral direction of the vehicle than a joint between the plurality of the floor crossmembers other than the central floor crossmember and the vehicle floor surface, wherein
• an arch is formed along a lower edge of the central floor crossmember;
• and
• the arch assumes such a shape as to increase in distance from the vehicle floor surface with increases in distance from the joint between the vehicle floor surface and the central floor crossmember.