Steel Beam Sizes / AISC / WT Tees / WT3x12.5

WT3x12.5 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

WT3x12.5 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 12.50 lb/ft 18.60 kg/m
Depth, d 3.19 in 81.00 mm
Flange width, bf 6.08 in 154.00 mm
tw 0.320 in 8.130 mm
tf 0.455 in 11.600 mm
Area 3.67 in² 2,370.00 mm²
Ix 2.29 in⁴ 953,000.00 mm⁴
Iy 8.53 in⁴ 3,550,000 mm⁴
Sx 0.89 in³ 14,500.00 mm³
Sy 2.81 in³ 46,000.00 mm³
Zx 1.68 in³ 27,500.00 mm³
Zy 4.28 in³ 70,100.00 mm³
rx 0.79 in 20.00 mm
ry 1.52 in 38.60 mm
J 0.23 in⁴ 95,300.00 mm⁴
Cw 0.17 in⁶ 45,900,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT3x12.5.

Lighter in WT3

WT3x10

Weight
10.0 lb/ft (-20%)
Depth
3.10 in (-2.8%)
Ix
1.8 in⁴ (-23%)

Closest Iₓ in WT3

WT3x8

Weight
8.0 lb/ft (-36%)
Depth
3.14 in (-1.6%)
Ix
1.7 in⁴ (-26%)

Similar weight in WT4

WT4x12

Weight
12.0 lb/ft (-4.0%)
Depth
3.97 in (+24%)
Ix
3.5 in⁴ (+54%)
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Source: AISC Shapes Database v16.0 · Methodology