YunMei offers a range of extremely cost effective guardrail fencing system. PURPOSE: Highway guardrail. YunMei supplies a full line of guardrail accessories and steel posts. Depending upon your site requirements, guardrail barriers can be easily configured for optimal performance and cost efficient. We are able to custom manufacture curve guardrail beams of various sizes. The most efficient method of installation is on driven posts which are driven into the ground by means of a hydraulic driving rig.