Highway guardrail is according to GB/T18226, AASHTO M180, etc., or similar standards, SIZE:310x85x3(4)x4320mm. highway guardrail SIZE OF W-BEAM: 310x85x3(4)x4320mmSTANDARDS: GB/T18226, AASHTO M180, etc., or similar standards. According to buyer's request is available. PURPOSE: highway guardrailCERTIFICATE: ISO9001 highway guardrail