The terminal end is mainly to follow the AASHTO M180, GB-T 31439.1-2015 and EN1317 standard.
The material for that are mainly the Q235B (S235Jr the yield strength is more than 235Mpa) and Q345B (S355Jr the yield strength is more than the 345Mpa).
For the thickness of the terminal end mainly through the 2.5mm to 4.0mm or follow the customers demand.
The surface treatment is hot dipped galvanized, to follow the AASHTO M232 and the equal standard such as AASHTO M111, EN1461 etc.
The terminal end is fixed on beginning and the ending of the road. It can protect people with the bend steel plate, to lower the hurt from the guardrail.