1.Hot dip galvanized 2.W-beam & tri-beam 3.Standard:China,EU,USA,AS/NZS 4.ISO9001:2008 5.Material:Q235,Q345,S275JR,ASTM A36 Galvanized Guardrail 1. Guardrail Highway guard rails main purpose is to veer cars from entering oncoming traffic as well as protect a driver from crashing into a solid object or driving off of an elevated area. Sturdy metal railing of steel in conjunction with a metal or ...