An automotive bench seat assembly which may be removable from a vehicle, has a seat, a seatback adjacent to the seat a pair of relatively spaced stanchions having an upper portion secured to the seat, and a lower floor engaging portion. The seat has a front rail, a rear rail, and a pair of side members connecting the front and rear rails. A pair of belt supporting towers are operatively associated with shoulder belts and serve to transmit impact loads to the floor through the stanchions. The stanchions have upper portions supportingly secured to towers or the rear rail intermediate the ends thereof and to the front rail intermediate the ends thereof. The stanchions have the floor engaging portion positioned inwardly of the side members. Lap belts also transmit impact loads through the stanchions to the floor. The stanchion may be generally V-shaped and have sidewalls composed of reinforced sheet members. Reinforced sheet members may be provided in the seatback and seat.