Steel Beam Sizes / Europe / RHS / RHS 80×40×5
RHS 80×40×5 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 80×40×5 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 | 5.66 lb/ft | 8.42 kg/m |
| Height | 3.15 in | 80.00 mm |
| Width | 1.57 in | 40.00 mm |
| t | 0.197 in | 5.000 mm |
| Area | 1.66 in² | 1,070.00 mm² |
| Ix | 1.93 in⁴ | 803,000.00 mm⁴ |
| Iy | 0.62 in⁴ | 257,000.00 mm⁴ |
| Sx | 1.23 in³ | 20,100.00 mm³ |
| Sy | 0.79 in³ | 12,900.00 mm³ |
| Zx | 1.59 in³ | 26,100.00 mm³ |
| Zy | 0.96 in³ | 15,700.00 mm³ |
| rx | 1.08 in | 27.40 mm |
| ry | 0.61 in | 15.50 mm |
| J | 1.56 in⁴ | 651,000.00 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 80×40×5.
Lighter in Rectangular hollow sections
RHS 60×40×6.3
- Weight
- 8.3 kg/m (-1.3%)
- Depth
- 60.0 mm (-25%)
- Ix
- 434,000 mm⁴ (-46%)
Heavier in Rectangular hollow sections
RHS 100×60×3.6
- Weight
- 8.5 kg/m (+1.3%)
- Depth
- 100.0 mm (+25%)
- Ix
- 1,450,000 mm⁴ (+81%)
Closest Iₓ in Rectangular hollow sections
RHS 90×50×3
- Weight
- 6.2 kg/m (-26%)
- Depth
- 90.0 mm (+13%)
- Ix
- 844,000 mm⁴ (+5.1%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology