RHS 500×300×12.5
Rectangular 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 |
|---|---|---|
| Height | 500 mm | 19.685 in |
| Width | 300 mm | 11.811 in |
| Thickness, t | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 658,000,000 mm⁴ | 1,580.851 in⁴ |
| Elastic modulus, Sₓ | 2,630,000 mm³ | 160.4924 in³ |
| Plastic modulus, Zₓ | 3,200,000 mm³ | 195.276 in³ |
| Radius of gyration, rₓ | 185 mm | 7.2835 in |
| Distance to top fibre | 250 mm | 9.8425 in |
| Distance to bottom fibre | 250 mm | 9.8425 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 298,000,000 mm⁴ | 715.9479 in⁴ |
| Elastic modulus, S_y | 1,980,000 mm³ | 120.827 in³ |
| Plastic modulus, Z_y | 2,240,000 mm³ | 136.6932 in³ |
| Radius of gyration, r_y | 125 mm | 4.9213 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 644,000,000 mm⁴ | 1,547.216 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 151 kg/m | 101.4673 lb/ft |