Rejection feature for center plate

In a body bolster center plate assembly for a railway car comprising in combination a center sill having walls contiguously arranged generally U-shaped in cross section and forming a centrally open interior;

• body bolster of longitudinal extent having a centrally defined laterally extending opening receiving said center sill intersecting therewith;
• shear plates longitudinally spaced apart secured within said sill interior to the walls thereof, at least one of said plates being located on each side of the center of intersection between said bolster and sill;
• said shear plates and portion of said sidewalls included therebetween defining a generally rectangular bottom-open pocket in which to receive a center plate;
• a center plate having a first portion of exterior dimension greater than said pocket for extending outward of the underside thereof and connecting with a second portion of reduced exterior dimension received within said pocket;
• and means securing the center plate to the underedge of said pocket walls forming a fixed rigid structure thereat, said center plate being detachable upon removal of said means;
• the improvement comprising said centerplate and said shear plate containing means for polarizing said center plate within the bottom-open pocket. Wherein the polarizing means on said shear plates is at least one stop lug disposed on the interior surface thereof for permitting the center plate to be installed in only two proper positions within the bottom-open pocket.