Steel Beam Sizes / UK / RHS / RHS 400×300×8.8
RHS 400×300×8.8 Steel Beam Dimensions and Properties
UK Rectangular hollow sections · v2023.11
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
RHS 400×300×8.8 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 | 62.90 lb/ft | 93.60 kg/m |
| Height | 15.75 in | 400.00 mm |
| Width | 11.81 in | 300.00 mm |
| t | 0.346 in | 8.800 mm |
| Area | 18.45 in² | 11,900.00 mm² |
| Ix | 675.11 in⁴ | 281,000,000 mm⁴ |
| Iy | 432.45 in⁴ | 180,000,000 mm⁴ |
| Sx | 85.43 in³ | 1,400,000 mm³ |
| Sy | 73.23 in³ | 1,200,000 mm³ |
| Zx | 101.30 in³ | 1,660,000 mm³ |
| Zy | 82.99 in³ | 1,360,000 mm³ |
| rx | 6.02 in | 153.00 mm |
| ry | 4.84 in | 123.00 mm |
| J | 814.45 in⁴ | 339,000,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 400×300×8.8.
Lighter in Rectangular hollow sections
RHS 300×200×12.5
- Weight
- 91.9 kg/m (-1.8%)
- Depth
- 300.0 mm (-25%)
- Ix
- 143,000,000 mm⁴ (-49%)
Heavier in Rectangular hollow sections
RHS 500×300×8
- Weight
- 97.9 kg/m (+4.6%)
- Depth
- 500.0 mm (+25%)
- Ix
- 437,000,000 mm⁴ (+56%)
Closest Iₓ in Rectangular hollow sections
RHS 350×250×14.2
- Weight
- 126.0 kg/m (+35%)
- Depth
- 350.0 mm (-12%)
- Ix
- 272,000,000 mm⁴ (-3.2%)
Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology