Steel Beam Sizes / Europe / CHS / CHS 406.4×12.5
CHS 406.4×12.5 Steel Beam Dimensions and Properties
EN Circular hollow sections · v2026.1
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
CHS 406.4×12.5 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 | 81.31 lb/ft | 121.00 kg/m |
| OD | 16.000 in | 406.400 mm |
| t | 0.492 in | 12.500 mm |
| Area | 24.03 in² | 15,500.00 mm² |
| Ix | 720.75 in⁴ | 300,000,000 mm⁴ |
| Iy | 720.75 in⁴ | 300,000,000 mm⁴ |
| Sx | 90.32 in³ | 1,480,000 mm³ |
| Sy | 90.32 in³ | 1,480,000 mm³ |
| Zx | 118.39 in³ | 1,940,000 mm³ |
| Zy | 118.39 in³ | 1,940,000 mm³ |
| rx | 5.47 in | 139.00 mm |
| ry | 5.47 in | 139.00 mm |
| J | 1,443.91 in⁴ | 601,000,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus CHS 406.4×12.5.
Lighter in Circular hollow sections
CHS 355.6×14.2
- Weight
- 120.0 kg/m (-0.8%)
- Depth
- — mm
- Ix
- 222,000,000 mm⁴ (-26%)
Heavier in Circular hollow sections
CHS 508×10
- Weight
- 123.0 kg/m (+1.7%)
- Depth
- — mm
- Ix
- 485,000,000 mm⁴ (+62%)
Closest Iₓ in Circular hollow sections
CHS 406.4×11
- Weight
- 107.0 kg/m (-12%)
- Depth
- — mm
- Ix
- 267,000,000 mm⁴ (-11%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology