Three waves Guardrail fence is a type of guardrail that is essentially two pieces of W-Beam Guardrail formed into one single shape.Hot Dip Galvanized Thrie-Beam Guardrails offer superior performance in areas of high-impact frequency or greater concentrations of heavy vehicles, and as bridge barriers. With a larger face than standard guardrails, the thrie-beam guardrail reduces deflections and improves resistance to overturning vehicles. it is much stronger and safer than w beam guardrail fence. and suitable for those dengerous road sections or bridge side as fence.