Steel Beam Sizes / Europe / RHS / RHS 400×150×8
RHS 400×150×8 Steel Beam Dimensions and Properties
EN Rectangular hollow sections · v2026.1
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
RHS 400×150×8 dimensions
Not to scale. Dimensions shown for reference.
Section properties
Symbols match the steel section finder. Imperial and metric values are shown side by side.
| Property | Imperial | Metric |
|---|---|---|
| Weight | 44.69 lb/ft | 66.50 kg/m |
| Height | 15.75 in | 400.00 mm |
| Width | 5.91 in | 150.00 mm |
| t | 0.315 in | 8.000 mm |
| Area | 13.14 in² | 8,480.00 mm² |
| Ix | 396.41 in⁴ | 165,000,000 mm⁴ |
| Iy | 84.33 in⁴ | 35,100,000 mm⁴ |
| Sx | 50.28 in³ | 824,000.00 mm³ |
| Sy | 28.56 in³ | 468,000.00 mm³ |
| Zx | 64.07 in³ | 1,050,000 mm³ |
| Zy | 31.79 in³ | 521,000.00 mm³ |
| rx | 5.47 in | 139.00 mm |
| ry | 2.53 in | 64.30 mm |
| J | 226.32 in⁴ | 94,200,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 400×150×8.
Lighter in Rectangular hollow sections
RHS 300×200×8.8
- Weight
- 66.0 kg/m (-0.8%)
- Depth
- 300.0 mm (-25%)
- Ix
- 106,000,000 mm⁴ (-36%)
Heavier in Rectangular hollow sections
RHS 220×120×14.2
- Weight
- 67.8 kg/m (+2.0%)
- Depth
- 220.0 mm (-45%)
- Ix
- 50,000,000 mm⁴ (-70%)
Closest Iₓ in Rectangular hollow sections
RHS 350×250×8
- Weight
- 72.8 kg/m (+9.5%)
- Depth
- 350.0 mm (-12%)
- Ix
- 164,000,000 mm⁴ (-0.6%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology