Horizontally discharging semi-trailer

In a horizontally discharging semi-trailer having an elongated body with a discharge opening in one end and a movable pusher plate and means for moving the same normally positioned in the opposite end, said elongated body having a smooth floor and smooth inner side walls;

• said floor comprising a floor plate, a plurality of longitudinally spaced transversely positioned reinforcing members secured to the underside thereof, longitudinally extending frame members secured to the longitudinal sides of said floor plate and reinforcing members, a pair of transversely spaced longitudinally extending beams having notches therein registering with said reinforcing members and secured thereto and to said floor plate and a secondary plate positioned between said beams and secured to the bottoms thereof, the side walls of said elongated body comprising substantially vertically standing wall plates attached to and extending upwardly from said longitudinally extending frame members, rails positioned on the upper longitudinal edges of said wall plates and a plurality of longitudinally spaced vertically standing tapered secondary reinforcing members secured to the outer surfaces of said wall plates and attached at their upper and lower ends to said rails and frame members respectively so that said side walls form rigid truss-like members continuously engaged on and supporting said floor therebetween.