Abstract: A replacement flooring for a dump truck, railroad car or other truck having a body upon a frame, the body including front and side walls and aflooring plate. The replacement flooring comprises a replacement floor plate superimposed over the flooring plate and peripherally welded and sealed thereto, defining a sealed chamber between the plates. A two-stage copolymer, including a resin, fills the chamber and is cured. The hardened cured filler spacer of the copolymer material is snugly interposed between the plates. A modified protective flooring includes a series of spaced, upright, U-shaped tubular stiffener rails with base portions thereof filled with a hardened thermosetting copolymer. Another modified protective flooring includes a metallic floor having a layer of cured, hardened thermosetting copolymer material thereunder, mounted over and secured to the flooring plate.

Abstract: The method of making a replacement flooring for a dump truck having a body upon a frame, the body including front and side walls and a damaged, punctured flooring plate, comprising the steps of superimposing a metal replacement floor over the damaged flooring plate, peripherally welding it thereto defining a sealed chamber between the plates. Further steps include drilling a vent and fill opening through the replacement plate, thereafter injecting under pressure a two-stage thermosetting copolymer filling the chamber and thereafter curing the copolymer providing a hardened spacer filler between the plates. Replacement flooring for the damaged flooring plate comprises a replacement floor plate superimposed over the flooring plate and peripherally welded and sealed thereto defining a sealed chamber between the plates. A hardened cured filler spacer of a thermosetting copolymer material is snugly interposed between the plates.