Steel Beam Sizes / Australia / Universal Beams / 250 UB 31
250 UB 31 Dimensions, Weight and Section Properties
ASNZS Universal beams · v2019.11
250 UB 31: 251.5 mm depth, 146.1 mm flange width, 31 kg/m weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
250 UB 31 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 | 20.83 lb/ft | 31.00 kg/m |
| Depth, d | 9.90 in | 251.50 mm |
| Flange width, bf | 5.75 in | 146.10 mm |
| tw | 0.240 in | 6.100 mm |
| tf | 0.340 in | 8.640 mm |
| Area | 6.20 in² | 4,000.00 mm² |
| Ix | 106.67 in⁴ | 44,400,000 mm⁴ |
| Iy | 10.79 in⁴ | 4,490,000 mm⁴ |
| Sx | 21.55 in³ | 353,081.51 mm³ |
| Sy | 3.75 in³ | 61,464.75 mm³ |
| Zx | 24.17 in³ | 396,000.00 mm³ |
| Zy | 5.77 in³ | 94,500.00 mm³ |
| rx | 4.15 in | 105.36 mm |
| ry | 1.32 in | 33.50 mm |
| J | 0.21 in⁴ | 87,300.00 mm⁴ |
| Cw | 246.52 in⁶ | 66,199,998,464 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus 250 UB 31.
Lighter in Universal beams
200 UB 30
- Weight
- 30.0 kg/m (-3.2%)
- Depth
- 206.8 mm (-18%)
- Ix
- 28,900,000 mm⁴ (-35%)
Heavier in Universal beams
250 UB 37
- Weight
- 37.0 kg/m (+19%)
- Depth
- 256.0 mm (+1.8%)
- Ix
- 55,600,000 mm⁴ (+25%)
Another Iₓ option in Universal beams
250 UB 26
- Weight
- 26.0 kg/m (-16%)
- Depth
- 248.0 mm (-1.4%)
- Ix
- 35,400,000 mm⁴ (-20%)
Source: Australian-Sections.xlsx (Sheets 1-19) · v2019.11 · Methodology