Abstract: An underframe structure for a motor vehicle, the underframe structure comprising a floor (12), and at least two longitudinal side members (14) respectively disposed on each side of the floor (12); the floor (12) is divided into at least one front unit (16) and one rear unit (18) fixed to a transverse heel board (24). The underframe structure also comprises a lateral reinforcement part (26) which comprises at least one elongate body extending from the heel board towards the closest side member, the lateral reinforcement part is fixed on one side to the heel board (24), and on the other side to the front unit (16) of the floor (12) or to a side member (14) in the region of the front unit (16) of the floor.

Abstract: An underframe structure for a motor vehicle, the underframe structure comprising a floor (12), and at least two longitudinal side members (14) respectively disposed on each side of the floor (12); the floor (12) is divided into at least one front unit (16) and one rear unit (18) fixed to a transverse heel board (24). The underframe structure also comprises a lateral reinforcement part (26) which comprises at least one elongate body extending from the heel board towards the closest side member, the lateral reinforcement part is fixed on one side to the heel board (24), and on the other side to the front unit (16) of the floor (12) or to a side member (14) in the region of the front unit (16) of the floor.

Abstract: A deformable bracing rod is disclosed for holding a lower crossmember of a windshield opening of a motor vehicle. The deformable bracing rod (200) has rigid end portions (203, 204), respectively attached to the windshield opening lower crossmember (301) and to another element (102) of the body of the vehicle, and a flexible central portion (203) connecting the two rigid end portions. It makes it possible to design a collapsible lower crossmember of a windshield opening which yields in the event of an impact so as to damp the impact experienced by the head of a pedestrian, while maintaining the level of acoustic and vibrational performance.