galvanized steel post prices traffic barrier factory steel road guard rails
Highway guardrail
1.The implementation standard of Chinese mainland refers to document GB/T 31439.1-2015 and GB/T 31439.2-2015
2.The United States standards refer to document AASHTO M 180 and AASHTO M270
3.The European implementation standard refers to document EN1317
Remark:The common dimensions and production process of each standard are shown in the following figure.