21×3.6 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 | 3.6 mm | 0.141732 in |
| Outside diameter | 21.3 mm | 0.838583 in |
| Inside diameter | 14.1 mm | 0.555118 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 8,160 mm⁴ | 0.019604 in⁴ |
| Elastic modulus, Sₓ | 766.1972 mm³ | 0.046756 in³ |
| Plastic modulus, Zₓ | 1,140 mm³ | 0.069567 in³ |
| Radius of gyration, rₓ | 6.3875 mm | 0.251476 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 | 8,160 mm⁴ | 0.019604 in⁴ |
| Elastic modulus, S_y | 766.1972 mm³ | 0.046756 in³ |
| Plastic modulus, Z_y | 1,140 mm³ | 0.069567 in³ |
| Radius of gyration, r_y | 6.3875 mm | 0.251476 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 16,300 mm⁴ | 0.039161 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 1.57 kg/m | 1.055 lb/ft |