21×3.2 CHS
Circular hollow sections from Australian-Sections.xlsx (Sheets 1-19).
Outline drawn from the published dimensions. Fillets and root radii are not shown.
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness, t | 3.2 mm | 0.125984 in |
| Outside diameter | 21.3 mm | 0.838583 in |
| Inside diameter | 14.9 mm | 0.586614 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 7,680 mm⁴ | 0.018451 in⁴ |
| Elastic modulus, Sₓ | 721.1268 mm³ | 0.044006 in³ |
| Plastic modulus, Zₓ | 1,060 mm³ | 0.064685 in³ |
| Radius of gyration, rₓ | 6.496 mm | 0.255747 in |
| Distance to top fibre | 10.65 mm | 0.4192915 in |
| Distance to bottom fibre | 10.65 mm | 0.4192915 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 7,680 mm⁴ | 0.018451 in⁴ |
| Elastic modulus, S_y | 721.1268 mm³ | 0.044006 in³ |
| Plastic modulus, Z_y | 1,060 mm³ | 0.064685 in³ |
| Radius of gyration, r_y | 6.496 mm | 0.255747 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 15,400 mm⁴ | 0.036999 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 1.4287 kg/m | 0.960042 lb/ft |