Steel Beam Sizes / Europe / RHS / RHS 180×100×4
RHS 180×100×4 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 180×100×4 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 | 11.36 lb/ft | 16.90 kg/m |
| Height | 7.09 in | 180.00 mm |
| Width | 3.94 in | 100.00 mm |
| t | 0.157 in | 4.000 mm |
| Area | 3.35 in² | 2,160.00 mm² |
| Ix | 22.70 in⁴ | 9,450,000 mm⁴ |
| Iy | 9.11 in⁴ | 3,790,000 mm⁴ |
| Sx | 6.41 in³ | 105,000.00 mm³ |
| Sy | 4.63 in³ | 75,900.00 mm³ |
| Zx | 7.81 in³ | 128,000.00 mm³ |
| Zy | 5.20 in³ | 85,200.00 mm³ |
| rx | 2.60 in | 66.10 mm |
| ry | 1.65 in | 41.90 mm |
| J | 20.47 in⁴ | 8,520,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 180×100×4.
Lighter in Rectangular hollow sections
RHS 100×50×8
- Weight
- 16.3 kg/m (-3.6%)
- Depth
- 100.0 mm (-44%)
- Ix
- 2,300,000 mm⁴ (-76%)
Heavier in Rectangular hollow sections
RHS 100×60×8
- Weight
- 17.5 kg/m (+3.6%)
- Depth
- 100.0 mm (-44%)
- Ix
- 2,640,000 mm⁴ (-72%)
Closest Iₓ in Rectangular hollow sections
RHS 180×60×5.6
- Weight
- 19.9 kg/m (+18%)
- Depth
- 180.0 mm (0.0%)
- Ix
- 9,320,000 mm⁴ (-1.4%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology