circular hollow section — 8.38 kg per metre, 10.67 cm² cross-sectional area. IS 1161:2014 Table 1 - Steel Tubes for Structural Purposes.
Circular Hollow Sections. Reproduced as printed in IS 1161:2014 Table 1 - Steel Tubes for Structural Purposes.
As printed in IS 1161:2014 Table 1 - Steel Tubes for Structural Purposes. 88.9 mm outside diameter, 4 mm wall thickness. Units are shown on every row, because the two standards on this site use different ones for the radius of gyration.
| Nominal bore NB | 80 | mm |
|---|---|---|
| Outside diameter OD | 88.9 | mm |
| Wall thickness t | 4 | mm |
| Mass per metre M | 8.38 | kg/m |
|---|---|---|
| Sectional area A | 10.67 | cm² |
| Second moment of area I | 96.34 | cm⁴ |
|---|---|---|
| Section modulus Z | 21.67 | cm³ |
| Radius of gyration r | 3 | cm |
| Square of the radius of gyration r² | 9.03 | cm² |
Total weight is the mass per metre multiplied by the length and the number of pieces. Ten pieces of 88.9 mm OD × 4 mm at six metres each is 8.38 × 6 × 10 = 503 kg. There is nothing else to it — the standard publishes the mass, so no one needs to compute it from the area.
You can check that mass against the area on this page: 10.67 cm² of steel at 7 850 kg/m³ is 8.38 kg/m. Every row in this dataset was checked that way, which is how the contradictions flagged on some of these pages were found.
Work it out for your own lengths and quantities →
IS 1161 : 2014 gives 88.9 mm OD × 4 mm a mass of 8.38 kg per metre. Its printed cross-sectional area of 10.67 cm² agrees: 10.67 cm² of steel at 7 850 kg/m³ works out at 8.38 kg per metre.
50.28 kg. Mass per metre times length: 8.38 × 6. Ten such pieces come to 503 kg.
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