extending downwardly over the perimetrical edge 28 of the floor and acting as the shield fig1 shows member 23c in the form of a double angulated member where a horizontal portion 53 engaging the upper surface 26 of the floor 22 and being secured thereto by bolt assemblies 27 as hereinbefore described a vertical flange 54 extends upwardly from the inner edge of the horizontal portion 53 and the bin wall portion 34 is bolted thereto as clearly illustrated a vertical flange portion 55 extends downwardly from the outer edge of the horizontal portion 53 over the perimetrical edge 28 of the floor and acts as the shield once again as clearly illustrated fig1 shows a construction which is particularly suitable for prime manufacture in this embodiment the lower wall portion 34 of the bin wall is angulated outwardly to form a horizontal flange 56 which engages the upper surface 26 of the floor 22 and is bolted thereto by means of nut and bolt assemblies 27 a vertical flange portion 57 is formed on the outer edge of the horizontal portion 56 and extends downwardly over the perimetrical edge 28 of the floor thus acting as the shield in all instances the nut and bolt assemblies 27 are preferred but other means of fastening can be used in all instances the member 23 etc is preferably formed in sections and bolted together as it is assembled upon the floor of the grain bin this is particularly so if the grain bin is cylindrical in configuration although the term 34 angle iron 34 has been used nevertheless.