Steel Beam Sizes / AISC / W-Shapes / W40 / W40x331

W40x331 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

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

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W40x331.

Browse W40 series →

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%)

Closest Iₓ 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%)
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Source: AISC Shapes Database v16.0 · Methodology