Steel Beam Sizes / AISC / WT Tees / WT4x9
WT4x9 Steel Beam Dimensions and Properties
AISC Structural tees · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
WT4x9 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 | 9.00 lb/ft | 13.30 kg/m |
| Depth, d | 4.07 in | 103.00 mm |
| Flange width, bf | 5.25 in | 133.00 mm |
| tw | 0.230 in | 5.840 mm |
| tf | 0.330 in | 8.380 mm |
| Area | 2.63 in² | 1,700.00 mm² |
| Ix | 3.41 in⁴ | 1,420,000 mm⁴ |
| Iy | 3.98 in⁴ | 1,660,000 mm⁴ |
| Sx | 1.05 in³ | 17,200.00 mm³ |
| Sy | 1.52 in³ | 24,900.00 mm³ |
| Zx | 1.86 in³ | 30,500.00 mm³ |
| Zy | 2.33 in³ | 38,200.00 mm³ |
| rx | 1.14 in | 29.00 mm |
| ry | 1.23 in | 31.20 mm |
| J | 0.09 in⁴ | 35,600.00 mm⁴ |
| Cw | 0.06 in⁶ | 15,100,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT4x9.
Lighter in WT4
WT4x7.5
- Weight
- 7.5 lb/ft (-17%)
- Depth
- 4.06 in (-0.2%)
- Ix
- 3.3 in⁴ (-3.8%)
Heavier in WT4
WT4x10.5
- Weight
- 10.5 lb/ft (+17%)
- Depth
- 4.14 in (+1.7%)
- Ix
- 3.9 in⁴ (+14%)
Closest Iₓ in WT4
WT4x12
- Weight
- 12.0 lb/ft (+33%)
- Depth
- 3.97 in (-2.5%)
- Ix
- 3.5 in⁴ (+3.5%)
Similar weight in WT5
WT5x8.5
- Weight
- 8.5 lb/ft (-5.6%)
- Depth
- 5.06 in (+24%)
- Ix
- 6.1 in⁴ (+78%)
Source: AISC Shapes Database v16.0 · Methodology