... export worldwide. We can manufacture W Beam (Profile A), Profile B, and different types of steel posts (C Posts, U Posts, Sigma Posts ... those Standards below:a. JT/T 281-1995(Corrugated Sheet Steel Beams For Expressway Guardrail - China)b. AASHTO-M180 (Corrugated ... export worldwide. We can manufacture W Beam (Profile A), Profile B, and different types of steel posts (C Posts, U Posts, Sigma Posts ...