Steel Beam Sizes / AISC / WT Tees / WT12x31

WT12x31 Steel Beam Dimensions and Properties

AISC Structural tees · v16.0

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

Units

Section diagram

WT12x31 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 46.00 kg/m
Depth, d 11.90 in 302.00 mm
Flange width, bf 7.04 in 179.00 mm
tw 0.430 in 10.900 mm
tf 0.590 in 15.000 mm
Area 9.11 in² 5,880.00 mm²
Ix 131.00 in⁴ 54,500,000 mm⁴
Iy 17.20 in⁴ 7,160,000 mm⁴
Sx 15.60 in³ 256,000.00 mm³
Sy 4.90 in³ 80,300.00 mm³
Zx 28.40 in³ 465,000.00 mm³
Zy 7.85 in³ 129,000.00 mm³
rx 3.79 in 96.30 mm
ry 1.38 in 35.10 mm
J 0.85 in⁴ 354,000.00 mm⁴
Cw 3.92 in⁶ 1,050,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT12x31.

Lighter in WT12

WT12x27.5

Weight
27.5 lb/ft (-11%)
Depth
11.80 in (-0.8%)
Ix
117.0 in⁴ (-11%)

Heavier in WT12

WT12x34

Weight
34.0 lb/ft (+9.7%)
Depth
11.90 in (0.0%)
Ix
137.0 in⁴ (+4.6%)

Closest Iₓ in WT12

WT12x38

Weight
38.0 lb/ft (+23%)
Depth
12.00 in (+0.8%)
Ix
151.0 in⁴ (+15%)

Similar weight in WT10

WT10.5x31

Weight
31.0 lb/ft (0.0%)
Depth
10.50 in (-12%)
Ix
93.8 in⁴ (-28%)
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Source: AISC Shapes Database v16.0 · Methodology