Sheet Ground Rods are turned from bars of material from already cured sheets. When looking at a cross section, laminations are parallel. Generally, properties of sheet ground rods conform to the grade of sheet stock from which they are cut. In comparison to Rolled and Molded Rods which are produced from prepreg that has been wound around a mandrel, placed in cylindrical molds, mandrel removed and then cured under high temperature and pressure. There is no industry standard for sheet ground rods. If you require rods to an industry standard, please consider our line of rolled and molded rods.