CHS 273×12.5
Circular hollow sections from Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1.
Outline drawn from the published dimensions. Fillets and root radii are not shown.
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness, t | 12.5 mm | 0.492126 in |
| Outside diameter | 273 mm | 10.748 in |
| Inside diameter | 248 mm | 9.7638 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 87,000,000 mm⁴ | 209.0183 in⁴ |
| Elastic modulus, Sₓ | 637,000 mm³ | 38.8721 in³ |
| Plastic modulus, Zₓ | 849,000 mm³ | 51.8092 in³ |
| Radius of gyration, rₓ | 92.2 mm | 3.6299 in |
| Distance to top fibre | 136.5 mm | 5.374 in |
| Distance to bottom fibre | 136.5 mm | 5.374 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 87,000,000 mm⁴ | 209.0183 in⁴ |
| Elastic modulus, S_y | 637,000 mm³ | 38.8721 in³ |
| Plastic modulus, Z_y | 849,000 mm³ | 51.8092 in³ |
| Radius of gyration, r_y | 92.2 mm | 3.6299 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 174,000,000 mm⁴ | 418.0367 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 80.3 kg/m | 53.9591 lb/ft |