Steel Beam Sizes / AISC / WT Tees / WT4x20
WT4x20 Dimensions, Weight and Section Properties
AISC Structural tees · v16.0
WT4x20: 4.13 in depth, 8.07 in flange width, 20 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
WT4x20 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 | 20.00 lb/ft | 29.50 kg/m |
| Depth, d | 4.13 in | 105.00 mm |
| Flange width, bf | 8.07 in | 205.00 mm |
| tw | 0.360 in | 9.140 mm |
| tf | 0.560 in | 14.200 mm |
| Area | 5.87 in² | 3,790.00 mm² |
| Ix | 5.73 in⁴ | 2,390,000 mm⁴ |
| Iy | 24.50 in⁴ | 10,200,000 mm⁴ |
| Sx | 1.69 in³ | 27,700.00 mm³ |
| Sy | 6.08 in³ | 99,600.00 mm³ |
| Zx | 3.25 in³ | 53,300.00 mm³ |
| Zy | 9.24 in³ | 151,000.00 mm³ |
| rx | 0.99 in | 25.10 mm |
| ry | 2.04 in | 51.80 mm |
| J | 0.56 in⁴ | 232,000.00 mm⁴ |
| Cw | 0.72 in⁶ | 192,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus WT4x20.
Lighter in WT4
WT4x17.5
- Weight
- 17.5 lb/ft (-13%)
- Depth
- 4.06 in (-1.7%)
- Ix
- 4.8 in⁴ (-16%)
Heavier in WT4
WT4x24
- Weight
- 24.0 lb/ft (+20%)
- Depth
- 4.25 in (+2.9%)
- Ix
- 6.9 in⁴ (+20%)
Another Iₓ option in WT4
WT4x15.5
- Weight
- 15.5 lb/ft (-23%)
- Depth
- 4.00 in (-3.1%)
- Ix
- 4.3 in⁴ (-25%)
Similar weight in WT5
WT5x19.5
- Weight
- 19.5 lb/ft (-2.5%)
- Depth
- 4.96 in (+20%)
- Ix
- 8.8 in⁴ (+54%)
Source: AISC Shapes Database v16.0 · Methodology