Highway guardrail is according to GB/T18226, AASHTO M180, etc., or similar standards, and buyer's special request is available. 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 guardrail