Steel Beam Sizes / AISC / W-Shapes / W40 / W40x331
W40x331 Dimensions, Weight and Section Properties
AISC Wide flange · v16.0
W40x331: 40.8 in depth, 12.2 in flange width, 331 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
Need this steel supplied or fabricated?
Request project pricing for delivery in the United States or Canada.
Get a steel quote →Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
W40x331 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 | 331.00 lb/ft | 494.00 kg/m |
| Depth, d | 40.80 in | 1,040.00 mm |
| Flange width, bf | 12.20 in | 310.00 mm |
| tw | 1.220 in | 31.000 mm |
| tf | 2.130 in | 54.100 mm |
| Area | 97.70 in² | 63,000.00 mm² |
| Ix | 24,700.00 in⁴ | 10,300,000,000 mm⁴ |
| Iy | 644.00 in⁴ | 268,000,000 mm⁴ |
| Sx | 1,210.00 in³ | 19,800,000 mm³ |
| Sy | 106.00 in³ | 1,740,000 mm³ |
| Zx | 1,430.00 in³ | 23,400,000 mm³ |
| Zy | 172.00 in³ | 2,820,000 mm³ |
| rx | 15.90 in | 404.00 mm |
| ry | 2.57 in | 65.30 mm |
| J | 105.00 in⁴ | 43,700,000 mm⁴ |
| Cw | 241,000.00 in⁶ | 64,700,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus W40x331.
Lighter in W40
W40x327
- Weight
- 327.0 lb/ft (-1.2%)
- Depth
- 40.80 in (0.0%)
- Ix
- 24,500.0 in⁴ (-0.8%)
Heavier in W40
W40x362
- Weight
- 362.0 lb/ft (+9.4%)
- Depth
- 40.60 in (-0.5%)
- Ix
- 28,900.0 in⁴ (+17%)
Another Iₓ option in W40
W40x324
- Weight
- 324.0 lb/ft (-2.1%)
- Depth
- 40.20 in (-1.5%)
- Ix
- 25,600.0 in⁴ (+3.6%)
Similar weight in W36
W36x330
- Weight
- 330.0 lb/ft (-0.3%)
- Depth
- 37.70 in (-7.6%)
- Ix
- 23,300.0 in⁴ (-5.7%)
Source: AISC Shapes Database v16.0 · Methodology