Plastic beam supporting floors of livestock and poultry farmer plastics industry of plastic beam (Figures 1 and 2), made of PVC, ABS, HDPE, or other plastic raw material apply,Through the extrusion process in triangular form, with three or more options of time as interest (Figure 2), having internal trabeculae (4) to ensure greater tensile strength.The beam plastic (Figure 1) is applied in the construction of cages, surroundings of the creation of pigs and poultry, or others as interest, having the function of supporting the floors plastics (figures 3,4 and 5), these being fitted in the fin socket (2) higher than the beam plastic (Figure 3, detail).