Guardrails that are based on the base casting structure, weight and size, cast alloy properties and production conditions, select the appropriate sub-surface and shape, making the core method, a reasonable set casting bars, cold iron, riser and gating system, in order to guarantee access to quality castings. Detailed description: a. fence base Product Description: Fence base of cast iron as material, is widely used is more widely used as a road facilities II. fence base Product Process characteristics: guardrail base that are based on the casting structure, weight and size, cast alloy properties and production conditions, select the appropriate sub-surface and shape, making the core method, a reasonable set casting bars, cold iron, riser and gating system so as to ensure access to quality castings.