Floor Structure for a Body of a Vehicle, Body for a Vehicle, and Vehicle

A floor structure for a body of a vehicle includes two side sills spaced apart from each other in a transverse direction of the vehicle. A main floor element is disposed between the two side sills. An energy store is disposed under the main floor element. A crossmember element is disposed on an upper side of the main floor element and extends in the transverse direction of the vehicle between the two side sills. A hollow cross section of the crossmember element is delimited upwardly in the vertical direction of the vehicle by an upper flange of the crossmember element and is supplemented by the main floor element to form a closed hollow cross section. A reinforcement element is attached to the main floor element via a first attachment region and is attached to the upper flange via a second attachment region and a third attachment region.