Steel Beam Sizes / Europe / CHS / CHS 508×12.5
CHS 508×12.5 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 508×12.5 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 | 102.81 lb/ft | 153.00 kg/m |
| OD | 20.000 in | 508.000 mm |
| t | 0.492 in | 12.500 mm |
| Area | 30.23 in² | 19,500.00 mm² |
| Ix | 1,436.70 in⁴ | 598,000,000 mm⁴ |
| Iy | 1,436.70 in⁴ | 598,000,000 mm⁴ |
| Sx | 143.41 in³ | 2,350,000 mm³ |
| Sy | 143.41 in³ | 2,350,000 mm³ |
| Zx | 187.34 in³ | 3,070,000 mm³ |
| Zy | 187.34 in³ | 3,070,000 mm³ |
| rx | 6.89 in | 175.00 mm |
| ry | 6.89 in | 175.00 mm |
| J | 2,883.01 in⁴ | 1,200,000,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus CHS 508×12.5.
Lighter in Circular hollow sections
CHS 406.4×14.2
- Weight
- 137.0 kg/m (-10%)
- Depth
- — mm
- Ix
- 337,000,000 mm⁴ (-44%)
Heavier in Circular hollow sections
CHS 406.4×16
- Weight
- 154.0 kg/m (+0.7%)
- Depth
- — mm
- Ix
- 374,000,000 mm⁴ (-37%)
Closest Iₓ in Circular hollow sections
CHS 457×16
- Weight
- 174.0 kg/m (+14%)
- Depth
- — mm
- Ix
- 540,000,000 mm⁴ (-9.7%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology