Material: Q235(equivalent to S235JR/DIN EN10025 and GR.D/ASTM A283M),Q345(S355JR/ASTM A529M 1994),Q255JR, etc. Surface: hot dipped galvanized or powder coating Standard: AASHTO M-180, EN1317, RAL-RG620, JT/T 281-1995, JT/T ...