Steel Beam Sizes / AISC / W-Shapes / W16 / W16x31

W16x31 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

Analyze in Beam Calculator Back to W-Shapes All W16

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

Units

Section diagram

W16x31 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 31.00 lb/ft 46.10 kg/m
Depth, d 15.90 in 404.00 mm
Flange width, bf 5.53 in 140.00 mm
tw 0.275 in 6.990 mm
tf 0.440 in 11.200 mm
Area 9.13 in² 5,890.00 mm²
Ix 375.00 in⁴ 156,000,000 mm⁴
Iy 12.40 in⁴ 5,160,000 mm⁴
Sx 47.20 in³ 773,000.00 mm³
Sy 4.49 in³ 73,600.00 mm³
Zx 54.00 in³ 885,000.00 mm³
Zy 7.03 in³ 115,000.00 mm³
rx 6.41 in 163.00 mm
ry 1.17 in 29.70 mm
J 0.46 in⁴ 192,000.00 mm⁴
Cw 739.00 in⁶ 198,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W16x31.

Browse W16 series →

Lighter in W16

W16x26

Weight
26.0 lb/ft (-16%)
Depth
15.70 in (-1.3%)
Ix
301.0 in⁴ (-20%)

Heavier in W16

W16x36

Weight
36.0 lb/ft (+16%)
Depth
15.90 in (0.0%)
Ix
448.0 in⁴ (+19%)

Closest Iₓ in W16

W16x40

Weight
40.0 lb/ft (+29%)
Depth
16.00 in (+0.6%)
Ix
518.0 in⁴ (+38%)

Similar weight in W14

W14x30

Weight
30.0 lb/ft (-3.2%)
Depth
13.80 in (-13%)
Ix
291.0 in⁴ (-22%)
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Source: AISC Shapes Database v16.0 · Methodology