Steel Beam Sizes / UK / CHS / CHS 323.9×12.5
CHS 323.9×12.5 Steel Beam Dimensions and Properties
UK Circular hollow sections · v2023.11
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
CHS 323.9×12.5 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 | 64.51 lb/ft | 96.00 kg/m |
| OD | 12.752 in | 323.900 mm |
| t | 0.492 in | 12.500 mm |
| Area | 18.91 in² | 12,200.00 mm² |
| Ix | 355.57 in⁴ | 148,000,000 mm⁴ |
| Iy | 355.57 in⁴ | 148,000,000 mm⁴ |
| Sx | 55.96 in³ | 917,000.00 mm³ |
| Sy | 55.96 in³ | 917,000.00 mm³ |
| Zx | 73.84 in³ | 1,210,000 mm³ |
| Zy | 73.84 in³ | 1,210,000 mm³ |
| rx | 4.33 in | 110.00 mm |
| ry | 4.33 in | 110.00 mm |
| J | 713.55 in⁴ | 297,000,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus CHS 323.9×12.5.
Lighter in Circular hollow sections
CHS 355.6×11
- Weight
- 93.5 kg/m (-2.6%)
- Depth
- — mm
- Ix
- 177,000,000 mm⁴ (+20%)
Heavier in Circular hollow sections
CHS 406.4×10
- Weight
- 97.8 kg/m (+1.9%)
- Depth
- — mm
- Ix
- 245,000,000 mm⁴ (+66%)
Closest Iₓ in Circular hollow sections
CHS 355.6×10
- Weight
- 85.2 kg/m (-11%)
- Depth
- — mm
- Ix
- 162,000,000 mm⁴ (+9.5%)
Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology