Steel Beam Sizes / AISC / WT Tees / WT12x31
WT12x31 Dimensions, Weight and Section Properties
AISC Structural tees · v16.0
WT12x31: 11.9 in depth, 7.04 in flange width, 31 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
WT12x31 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 | 31.00 lb/ft | 46.00 kg/m |
| Depth, d | 11.90 in | 302.00 mm |
| Flange width, bf | 7.04 in | 179.00 mm |
| tw | 0.430 in | 10.900 mm |
| tf | 0.590 in | 15.000 mm |
| Area | 9.11 in² | 5,880.00 mm² |
| Ix | 131.00 in⁴ | 54,500,000 mm⁴ |
| Iy | 17.20 in⁴ | 7,160,000 mm⁴ |
| Sx | 15.60 in³ | 256,000.00 mm³ |
| Sy | 4.90 in³ | 80,300.00 mm³ |
| Zx | 28.40 in³ | 465,000.00 mm³ |
| Zy | 7.85 in³ | 129,000.00 mm³ |
| rx | 3.79 in | 96.30 mm |
| ry | 1.38 in | 35.10 mm |
| J | 0.85 in⁴ | 354,000.00 mm⁴ |
| Cw | 3.92 in⁶ | 1,050,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus WT12x31.
Lighter in WT12
WT12x27.5
- Weight
- 27.5 lb/ft (-11%)
- Depth
- 11.80 in (-0.8%)
- Ix
- 117.0 in⁴ (-11%)
Heavier in WT12
WT12x34
- Weight
- 34.0 lb/ft (+9.7%)
- Depth
- 11.90 in (0.0%)
- Ix
- 137.0 in⁴ (+4.6%)
Another Iₓ option in WT12
WT12x38
- Weight
- 38.0 lb/ft (+23%)
- Depth
- 12.00 in (+0.8%)
- Ix
- 151.0 in⁴ (+15%)
Similar weight in WT10
WT10.5x31
- Weight
- 31.0 lb/ft (0.0%)
- Depth
- 10.50 in (-12%)
- Ix
- 93.8 in⁴ (-28%)
Source: AISC Shapes Database v16.0 · Methodology