Steel Beam Sizes / AISC / WT Tees / WT8x20
WT8x20 Steel Beam Dimensions and Properties
AISC Structural tees · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
WT8x20 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 | 30.00 kg/m |
| Depth, d | 8.01 in | 203.00 mm |
| Flange width, bf | 7.00 in | 178.00 mm |
| tw | 0.305 in | 7.750 mm |
| tf | 0.505 in | 12.800 mm |
| Area | 5.89 in² | 3,800.00 mm² |
| Ix | 33.10 in⁴ | 13,800,000 mm⁴ |
| Iy | 14.40 in⁴ | 5,990,000 mm⁴ |
| Sx | 5.35 in³ | 87,700.00 mm³ |
| Sy | 4.12 in³ | 67,500.00 mm³ |
| Zx | 9.43 in³ | 155,000.00 mm³ |
| Zy | 6.36 in³ | 104,000.00 mm³ |
| rx | 2.37 in | 60.20 mm |
| ry | 1.56 in | 39.60 mm |
| J | 0.40 in⁴ | 165,000.00 mm⁴ |
| Cw | 0.67 in⁶ | 181,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT8x20.
Lighter in WT8
WT8x18
- Weight
- 18.0 lb/ft (-10%)
- Depth
- 7.93 in (-1.0%)
- Ix
- 30.6 in⁴ (-7.6%)
Heavier in WT8
WT8x22.5
- Weight
- 22.5 lb/ft (+13%)
- Depth
- 8.07 in (+0.7%)
- Ix
- 37.8 in⁴ (+14%)
Closest Iₓ in WT8
WT8x15.5
- Weight
- 15.5 lb/ft (-23%)
- Depth
- 7.94 in (-0.9%)
- Ix
- 27.5 in⁴ (-17%)
Similar weight in WT9
WT9x20
- Weight
- 20.0 lb/ft (0.0%)
- Depth
- 8.95 in (+12%)
- Ix
- 44.8 in⁴ (+35%)
Source: AISC Shapes Database v16.0 · Methodology