Steel Beam Sizes / UK / RHS / RHS 120×80×8.8
RHS 120×80×8.8 Steel Beam Dimensions and Properties
UK Rectangular hollow sections · v2023.11
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
RHS 120×80×8.8 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 | 16.46 lb/ft | 24.50 kg/m |
| Height | 4.72 in | 120.00 mm |
| Width | 3.15 in | 80.00 mm |
| t | 0.346 in | 8.800 mm |
| Area | 4.85 in² | 3,130.00 mm² |
| Ix | 13.48 in⁴ | 5,610,000 mm⁴ |
| Iy | 6.97 in⁴ | 2,900,000 mm⁴ |
| Sx | 5.71 in³ | 93,500.00 mm³ |
| Sy | 4.42 in³ | 72,400.00 mm³ |
| Zx | 7.26 in³ | 119,000.00 mm³ |
| Zy | 5.41 in³ | 88,700.00 mm³ |
| rx | 1.67 in | 42.40 mm |
| ry | 1.20 in | 30.40 mm |
| J | 15.11 in⁴ | 6,290,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 120×80×8.8.
Lighter in Rectangular hollow sections
RHS 120×60×10
- Weight
- 24.3 kg/m (-0.8%)
- Depth
- 120.0 mm (0.0%)
- Ix
- 4,880,000 mm⁴ (-13%)
Heavier in Rectangular hollow sections
RHS 160×80×7.1
- Weight
- 24.7 kg/m (+0.8%)
- Depth
- 160.0 mm (+33%)
- Ix
- 9,940,000 mm⁴ (+77%)
Closest Iₓ in Rectangular hollow sections
RHS 120×80×8
- Weight
- 22.6 kg/m (-7.8%)
- Depth
- 120.0 mm (0.0%)
- Ix
- 5,250,000 mm⁴ (-6.4%)
Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology