In a vehicle body rear part structure, a plurality of first spot weld parts that join the rear panel inner flange and the rear panel outer flange by spot welding are provided at a first weld pitch; a plurality of second spot weld parts that join together the rear pillar inner flange and the rear pillar outer flange by spot welding are provided at a second weld pitch; at the corner part, a plurality of third spot weld parts that join together, by spot welding, regions of the rear panel inner flange, the rear panel outer flange, the rear pillar inner flange, and the rear pillar outer flange where at least three of the flanges overlap with one another are provided at a third weld pitch; and the third weld pitch is set to be shorter than the first weld pitch and the second weld pitch.

A side sill for a motor vehicle has a side-sill inner part assigned to a floor assembly, a bottom flange and a side-sill outer part which bounds a cavity of the side sill, in which a reinforcing part, which is fastened to the side-sill inner part, is arranged. In order to provide a side sill which is optimized in respect of simple manufacturing and installation and also needs-oriented design, and by which improved adaptability of the components to different construction variants is possible, the side-sill inner part and the bottom flange are designed as separate components which are connected to each other at least indirectly along a flange connection running in the direction of longitudinal extent of the side sill.

A vehicle body roof includes: a plurality of assembly rails spaced apart from each other in the lateral direction of the vehicle and extending in a forward-backward direction; a first roof rail disposed between the assembly rails; the first roof rail extending in the lateral direction toward the assembly rails and detachably mounted to the assembly rails; and a second roof rail extending in a predetermined shape according to a type of vehicle body and detachably mounted at an end portion thereof to an end portion of each of the assembly rails.

A frame connection structure may include a first frame including a frame hole, a joint mounted inside the first frame, a member inserted into the frame hole, and a connecting bracket connecting the member to the joint.

A front vehicle-body structure may include a pair of front side members each disposed in a vehicle length direction at both sides of a front vehicle-body, a pair of mounting brackets each engaged with a corresponding front side member among the pair of front side members and disposed to protrude from an internal panel of the corresponding front side member in a width direction of the vehicle to face each other, a cross bar having an upper surface, a front surface, and a rear surface, having a cross-section having an open bottom side and an open lateral end portion, and engaged with the mounting bracket in a vehicle height direction thereof, and an engagement unit of engaging the cross bar to the pair of mounting brackets with a predetermined gap between the pair of front side members and the lateral end portion of the cross bar.

A vehicle lower body structure can include: a side sill that forms a first closed cross section extending in a body front-rear direction; and a reinforcing member provided in the first closed cross section to reinforce a front end portion of the side sill. The reinforcing member can have: a front-end reinforcing section that supports a collision load applied to the front end portion of the side sill and directed rearward in a vehicle body; a deformation permission section that permits deformation of the side sill directed inward in a vehicle width direction and rearward at the time when the collision load directed inward in the vehicle width direction and rearward is applied to the front end portion of the side sill; and a deformation suppression section suppressing deformation of the side sill after the deformation of the side sill directed inward in the vehicle width direction and rearward.

A rear section upper face of a front side frame is connected to a front face of an inclined wall of a dashboard panel. An attachment bracket that is provided to a rear section lower face of the front side frame and that has a triangular shape in side view supports a support of a subframe. An outrigger is provided that has a vehicle width direction inner end connected to a front wall and a lower wall of the attachment bracket and to a vehicle width direction outer wall of the front side frame, and that has a vehicle width direction outer end connected to a front end of a side sill.

A motor vehicle dashboard crossbeam extends between A posts of the structure of a motor vehicle substantially in a transverse direction of the motor vehicle and includes an end section to be fastened to an A post, an intermediate section, and a fastening opening. The end section has a rectangular cross-section, the intermediate section has a circular cross-section, and the fastening opening extends through the end section and is configured for fastening the end section to the A post.

To improve bending rigidity of a side sill against a load toward an inner side in a vehicle width direction during a lateral collision while suppressing a weight increase of thereof by providing minimum reinforcement, the side sill has a closed cross-sectional space extending in a vehicle longitudinal direction and includes a first upper reinforcing member that reinforces bending rigidity against a load toward the vehicle width inner side. The first upper reinforcing member is configured to be partially provided in a cross-sectional view that is perpendicular to a longitudinal direction of the side sill and to extend along a longitudinal direction of the side sill such that at least a part thereof overlaps a center pillar joined portion, to which a center pillar is joined, in a vehicle side view at a height position of the center pillar joined portion.

A steering apparatus of a vehicle includes a plurality of coupling portions formed in a rack housing of a gear box and coupled to mounting portions of a vehicle body; and a nut member having a support surface and installed in each of the mounting portions of the vehicle body. In particular, each of the plurality of coupling portions has a seating surface formed as a curved surface with a predetermined curvature, and the seating surfaces are respectively seated on the support surface of the nut member installed in each of the mounting portions of the vehicle body such that the rack housing of the gear box is fixed to the vehicle body by a bolt which passes through each of the plurality of coupling portions to be engaged with the nut member of each of the mounting portions.