Sr. No. | Material | Size (in mm) | sch. & swg. | Specification | Manufacturer |
1 | mild steel (m. S. ) & g. I. | 15 nb to 150 nb | ‘a’ class ‘b’ class ‘c’ class | is 1239 | tata zenith jindal mukat lloyds lalit profiles etc. |
200 nb to 500 nb | 4. 85 mm to 12. 7 mm thk. | is 3589 (fe 330, fe 410) |