Izinto zalokho ikakhulukazi i-Q235B (S235Jr amandla okukhiqiza angaphezu kuka-235Mpa) kanye ne-Q345B (S355Jr amandla okukhiqiza angaphezu kuka-345Mpa).
I-Guardrail ngokuyinhloko ilandela i-AASHTO M180, GB-T 31439.1-2015 kanye ne-EN1317 standard.