Abstract: In this vehicle body floor structure, stiffeners that extend to a rear of a front cross member and that have a U-shaped concave portion that is open at to top thereof when viewed in a cross-section of a vehicle are joined to a bottom surface on both side portions of floor panel. Beads that have a U-shaped concave portion when viewed in a cross-section of the vehicle are provided at a rear portion of the floor panel, and the beads are aligned with the concave portion of the stiffeners and are provided continuously with the stiffeners.

Abstract: Disclosed is a vehicle body panel joining structure including a structural frame (30b) having a ridgeline in the lengthwise direction, which has one section joined to a first vehicle body panel (44) and another section joined to a second vehicle body panel (43); an overlap part (61) in which the first and second vehicle body panels are overlapped and which is arranged in such a way that the structural frame straddles the overlap part; a depressed part (64) which is disposed at a position avoiding the ridgeline on the structural frame and is abutted by the overlap part; and a spot welding part (65) which is joined to the depressed part (64), the first vehicle body panel, and the second vehicle body panel at the overlap part by means of spot welding.

Abstract: In this vehicle body floor structure, stiffeners that extend to a rear of a front cross member and that have a U-shaped concave portion that is open at to top thereof when viewed in a cross-section of a vehicle are joined to a bottom surface on both side portions of floor panel. Beads that have a U-shaped concave portion when viewed in a cross-section of the vehicle are provided at a rear portion of the floor panel, and the beads are aligned with the concave portion of the stiffeners and are provided continuously with the stiffeners.

Abstract: Disclosed is a vehicle body panel joining structure including a structural frame (30b) having a ridgeline in the lengthwise direction, which has one section joined to a first vehicle body panel (44) and another section joined to a second vehicle body panel (43); an overlap part (61) in which the first and second vehicle body panels are overlapped and which is arranged in such a way that the structural frame straddles the overlap part; a depressed part (64) which is disposed at a position avoiding the ridgeline on the structural frame and is abutted by the overlap part; and a spot welding part (65) which is joined to the depressed part (64), the first vehicle body panel, and the second vehicle body panel at the overlap part by means of spot welding.