... fit for fixed platforms, walkway, and stair treads and British, German,French and Japanese standards are available. The products ... shools,residential quarters,garden facilities,stadium,port,industry,oil and chemistry projects etc . 6.Production Flow Chart: ... & 4'' etc 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304, SS400, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour ...