products description :

1.material:SS400   or  Q235

2.thickness:1.6-8mm

3.diameter(span):500-8000mm

rrugated parameters :corrugated  from  the (p) x corrugated   depth (D)(mm)  68x13  76x25  125x 25  150x50  200x55

5.anti-corrosion   treatment  :hot  dip  galvanized ≥63 µm  second  preservcotive  (usually  by   coating asphalt)

6.Using the   life:≥75 years