Steel Beam Sizes / CISC / W-Shapes / W310×21
W310×21 Dimensions, Weight and Section Properties
CISC Wide flange · v12.1
W310×21: 303 mm depth, 101 mm flange width, 21 kg/m weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
W310×21 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 | 14.00 lb/ft | 21.00 kg/m |
| Depth, d | 11.93 in | 303.00 mm |
| Flange width, bf | 3.98 in | 101.00 mm |
| tw | 0.201 in | 5.100 mm |
| tf | 0.224 in | 5.700 mm |
| Area | 4.17 in² | 2,690.00 mm² |
| Ix | 88.89 in⁴ | 37,000,000 mm⁴ |
| Iy | 2.36 in⁴ | 983,000.00 mm⁴ |
| Sx | 14.89 in³ | 244,000.00 mm³ |
| Sy | 1.19 in³ | 19,500.00 mm³ |
| Zx | 17.51 in³ | 287,000.00 mm³ |
| Zy | 1.90 in³ | 31,200.00 mm³ |
| rx | 4.61 in | 117.00 mm |
| ry | 0.75 in | 19.10 mm |
| J | 0.07 in⁴ | 29,400.00 mm⁴ |
| Cw | 80.81 in⁶ | 21,700,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus W310×21.
Heavier in W310
W310×24
- Weight
- 24.0 kg/m (+14%)
- Depth
- 305.0 mm (+0.7%)
- Ix
- 42,700,000 mm⁴ (+15%)
Another Iₓ option in W310
W310×28
- Weight
- 28.0 kg/m (+36%)
- Depth
- 309.0 mm (+2.0%)
- Ix
- 54,300,000 mm⁴ (+47%)
Similar weight in W250
W250×22
- Weight
- 22.0 kg/m (+7.1%)
- Depth
- 254.0 mm (-16%)
- Ix
- 28,900,000 mm⁴ (-22%)
Source: CISC Structural Section Tables SST12.1 · v12.1 · Availability: Imported; readily available in Canada. · Methodology