Steel Beam Sizes / AISC / WT Tees / WT18x426.5
WT18x426.5 Steel Beam Dimensions and Properties
AISC Structural tees · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
WT18x426.5 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 | 426.50 lb/ft | 635.00 kg/m |
| Depth, d | 21.60 in | 549.00 mm |
| Flange width, bf | 18.20 in | 462.00 mm |
| tw | 2.520 in | 64.000 mm |
| tf | 4.530 in | 115.000 mm |
| Area | 126.00 in² | 81,300.00 mm² |
| Ix | 4,480.00 in⁴ | 1,860,000,000 mm⁴ |
| Iy | 2,300.00 in⁴ | 957,000,000 mm⁴ |
| Sx | 286.00 in³ | 4,690,000 mm³ |
| Sy | 253.00 in³ | 4,150,000 mm³ |
| Zx | 533.00 in³ | 8,740,000 mm³ |
| Zy | 403.00 in³ | 6,610,000 mm³ |
| rx | 5.96 in | 151.00 mm |
| ry | 4.27 in | 108.00 mm |
| J | 615.00 in⁴ | 256,000,000 mm⁴ |
| Cw | 7,100.00 in⁶ | 1,910,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT18x426.5.
Lighter in WT18
WT18x401
- Weight
- 401.0 lb/ft (-6.0%)
- Depth
- 21.30 in (-1.4%)
- Ix
- 4,110.0 in⁴ (-8.3%)
Heavier in WT18
WT18x462.5
- Weight
- 462.5 lb/ft (+8.4%)
- Depth
- 21.60 in (0.0%)
- Ix
- 5,130.0 in⁴ (+15%)
Closest Iₓ in WT18
WT18x361.5
- Weight
- 361.5 lb/ft (-15%)
- Depth
- 20.90 in (-3.2%)
- Ix
- 3,610.0 in⁴ (-19%)
Similar weight in WT20
WT20x327.5
- Weight
- 327.5 lb/ft (-23%)
- Depth
- 21.80 in (+0.9%)
- Ix
- 3,730.0 in⁴ (-17%)
Source: AISC Shapes Database v16.0 · Methodology