Steel Beam Sizes / Europe / RHS / RHS 400×200×12.5
RHS 400×200×12.5 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 400×200×12.5 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 | 75.26 lb/ft | 112.00 kg/m |
| Height | 15.75 in | 400.00 mm |
| Width | 7.87 in | 200.00 mm |
| t | 0.492 in | 12.500 mm |
| Area | 22.01 in² | 14,200.00 mm² |
| Ix | 699.13 in⁴ | 291,000,000 mm⁴ |
| Iy | 234.00 in⁴ | 97,400,000 mm⁴ |
| Sx | 88.48 in³ | 1,450,000 mm³ |
| Sy | 59.44 in³ | 974,000.00 mm³ |
| Zx | 110.45 in³ | 1,810,000 mm³ |
| Zy | 67.74 in³ | 1,110,000 mm³ |
| rx | 5.63 in | 143.00 mm |
| ry | 3.26 in | 82.80 mm |
| J | 562.19 in⁴ | 234,000,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 400×200×12.5.
Lighter in Rectangular hollow sections
RHS 500×300×8.8
- Weight
- 107.0 kg/m (-4.5%)
- Depth
- 500.0 mm (+25%)
- Ix
- 478,000,000 mm⁴ (+64%)
Heavier in Rectangular hollow sections
RHS 300×200×16
- Weight
- 115.0 kg/m (+2.7%)
- Depth
- 300.0 mm (-25%)
- Ix
- 174,000,000 mm⁴ (-40%)
Closest Iₓ in Rectangular hollow sections
RHS 450×150×11
- Weight
- 98.8 kg/m (-12%)
- Depth
- 450.0 mm (+13%)
- Ix
- 296,000,000 mm⁴ (+1.7%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology