There are mainly two specifications of steel guardrail: W-Beam guardrail and Thrie-Beam guardrail, They are manufactured from
Q235B or Q345B grade steel in 2.5-4mm base metal thickness as supplied by China Steel Limited.
All products are hot dipped galvanized or powder coated after fabrication to meet the requirements of Chinese National Standards,
AASHTO M180 Standard, SANA 1350 Standard and etc.