Steel Beam Sizes / CISC / W-Shapes / W310×129
W310×129 Dimensions, Weight and Section Properties
CISC Wide flange · v12.1
W310×129: 318 mm depth, 308 mm flange width, 129 kg/m weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
W310×129 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 | 87.00 lb/ft | 129.00 kg/m |
| Depth, d | 12.52 in | 318.00 mm |
| Flange width, bf | 12.13 in | 308.00 mm |
| tw | 0.516 in | 13.100 mm |
| tf | 0.811 in | 20.600 mm |
| Area | 25.58 in² | 16,500.00 mm² |
| Ix | 739.97 in⁴ | 308,000,000 mm⁴ |
| Iy | 240.25 in⁴ | 100,000,000 mm⁴ |
| Sx | 118.39 in³ | 1,940,000 mm³ |
| Sy | 39.79 in³ | 652,000.00 mm³ |
| Zx | 131.81 in³ | 2,160,000 mm³ |
| Zy | 60.47 in³ | 991,000.00 mm³ |
| rx | 5.39 in | 137.00 mm |
| ry | 3.07 in | 78.00 mm |
| J | 5.12 in⁴ | 2,130,000 mm⁴ |
| Cw | 8,267.05 in⁶ | 2,220,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus W310×129.
Lighter in W310
W310×118
- Weight
- 118.0 kg/m (-9.2%)
- Depth
- 314.0 mm (-1.3%)
- Ix
- 275,000,000 mm⁴ (-11%)
Heavier in W310
W310×143
- Weight
- 143.0 kg/m (+10%)
- Depth
- 323.0 mm (+1.6%)
- Ix
- 348,000,000 mm⁴ (+13%)
Another Iₓ option in W310
W310×107
- Weight
- 107.0 kg/m (-17%)
- Depth
- 311.0 mm (-2.2%)
- Ix
- 248,000,000 mm⁴ (-19%)
Similar weight in W250
W250×131
- Weight
- 131.0 kg/m (+1.1%)
- Depth
- 275.0 mm (-14%)
- Ix
- 221,000,000 mm⁴ (-28%)
Source: CISC Structural Section Tables SST12.1 · v12.1 · Availability: Imported; readily available in Canada. · Methodology