Steel Beam Sizes / UK / RHS / RHS 300×100×12.5
RHS 300×100×12.5 Dimensions, Weight and Section Properties
UK Rectangular hollow sections · v2023.11
RHS 300×100×12.5: 72.3 kg/m weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
RHS 300×100×12.5 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 | 48.58 lb/ft | 72.30 kg/m |
| Height | 11.81 in | 300.00 mm |
| Width | 3.94 in | 100.00 mm |
| t | 0.492 in | 12.500 mm |
| Area | 14.28 in² | 9,210.00 mm² |
| Ix | 218.63 in⁴ | 91,000,000 mm⁴ |
| Iy | 35.80 in⁴ | 14,900,000 mm⁴ |
| Sx | 37.04 in³ | 607,000.00 mm³ |
| Sy | 18.12 in³ | 297,000.00 mm³ |
| Zx | 49.19 in³ | 806,000.00 mm³ |
| Zy | 21.60 in³ | 354,000.00 mm³ |
| rx | 3.91 in | 99.40 mm |
| ry | 1.58 in | 40.20 mm |
| J | 104.51 in⁴ | 43,500,000 mm⁴ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus RHS 300×100×12.5.
Lighter in Rectangular hollow sections
RHS 260×180×11
- Weight
- 71.2 kg/m (-1.5%)
- Depth
- 260.0 mm (-13%)
- Ix
- 83,800,000 mm⁴ (-7.9%)
Heavier in Rectangular hollow sections
RHS 350×250×8
- Weight
- 72.8 kg/m (+0.7%)
- Depth
- 350.0 mm (+17%)
- Ix
- 164,000,000 mm⁴ (+80%)
Another Iₓ option in Rectangular hollow sections
RHS 300×250×6.3
- Weight
- 52.8 kg/m (-27%)
- Depth
- 300.0 mm (0.0%)
- Ix
- 91,900,000 mm⁴ (+1.0%)
Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology