Steel Beam Sizes / Europe / RHS / RHS 120×80×7.1
RHS 120×80×7.1 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 120×80×7.1 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 | 13.64 lb/ft | 20.30 kg/m |
| Height | 4.72 in | 120.00 mm |
| Width | 3.15 in | 80.00 mm |
| t | 0.280 in | 7.100 mm |
| Area | 4.00 in² | 2,580.00 mm² |
| Ix | 11.58 in⁴ | 4,820,000 mm⁴ |
| Iy | 6.03 in⁴ | 2,510,000 mm⁴ |
| Sx | 4.90 in³ | 80,300.00 mm³ |
| Sy | 3.83 in³ | 62,800.00 mm³ |
| Zx | 6.10 in³ | 100,000.00 mm³ |
| Zy | 4.59 in³ | 75,200.00 mm³ |
| rx | 1.70 in | 43.20 mm |
| ry | 1.23 in | 31.20 mm |
| J | 12.85 in⁴ | 5,350,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 120×80×7.1.
Lighter in Rectangular hollow sections
RHS 120×60×8
- Weight
- 20.1 kg/m (-1.0%)
- Depth
- 120.0 mm (0.0%)
- Ix
- 4,250,000 mm⁴ (-12%)
Heavier in Rectangular hollow sections
RHS 150×100×5.6
- Weight
- 20.7 kg/m (+2.0%)
- Depth
- 150.0 mm (+25%)
- Ix
- 8,140,000 mm⁴ (+69%)
Closest Iₓ in Rectangular hollow sections
RHS 120×60×10
- Weight
- 24.3 kg/m (+20%)
- Depth
- 120.0 mm (0.0%)
- Ix
- 4,880,000 mm⁴ (+1.2%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology