Steel Beam Sizes / Europe / RHS / RHS 300×100×8
RHS 300×100×8 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 300×100×8 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 | 32.05 lb/ft | 47.70 kg/m |
| Height | 11.81 in | 300.00 mm |
| Width | 3.94 in | 100.00 mm |
| t | 0.315 in | 8.000 mm |
| Area | 9.42 in² | 6,080.00 mm² |
| Ix | 151.36 in⁴ | 63,000,000 mm⁴ |
| Iy | 25.95 in⁴ | 10,800,000 mm⁴ |
| Sx | 25.63 in³ | 420,000.00 mm³ |
| Sy | 13.18 in³ | 216,000.00 mm³ |
| Zx | 33.32 in³ | 546,000.00 mm³ |
| Zy | 14.95 in³ | 245,000.00 mm³ |
| rx | 4.02 in | 102.00 mm |
| ry | 1.66 in | 42.10 mm |
| J | 73.76 in⁴ | 30,700,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 300×100×8.
Lighter in Rectangular hollow sections
RHS 200×100×11
- Weight
- 47.0 kg/m (-1.5%)
- Depth
- 200.0 mm (-33%)
- Ix
- 28,600,000 mm⁴ (-55%)
Heavier in Rectangular hollow sections
RHS 300×200×6.3
- Weight
- 47.9 kg/m (+0.4%)
- Depth
- 300.0 mm (0.0%)
- Ix
- 78,300,000 mm⁴ (+24%)
Closest Iₓ in Rectangular hollow sections
RHS 300×200×5
- Weight
- 38.3 kg/m (-20%)
- Depth
- 300.0 mm (0.0%)
- Ix
- 63,200,000 mm⁴ (+0.3%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology