Steel Beam Sizes / AISC / WT Tees / WT20x181

WT20x181 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

WT20x181 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 181.00 lb/ft 270.00 kg/m
Depth, d 20.30 in 516.00 mm
Flange width, bf 16.00 in 406.00 mm
tw 1.120 in 28.400 mm
tf 2.010 in 51.100 mm
Area 53.20 in² 34,300.00 mm²
Ix 1,870.00 in⁴ 778,000,000 mm⁴
Iy 691.00 in⁴ 288,000,000 mm⁴
Sx 122.00 in³ 2,000,000 mm³
Sy 86.30 in³ 1,410,000 mm³
Zx 217.00 in³ 3,560,000 mm³
Zy 135.00 in³ 2,210,000 mm³
rx 5.92 in 150.00 mm
ry 3.60 in 91.40 mm
J 54.20 in⁴ 22,600,000 mm⁴
Cw 511.00 in⁶ 137,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT20x181.

Lighter in WT20

WT20x165.5

Weight
165.5 lb/ft (-8.6%)
Depth
20.40 in (+0.5%)
Ix
1,880.0 in⁴ (+0.5%)

Heavier in WT20

WT20x186

Weight
186.0 lb/ft (+2.8%)
Depth
20.30 in (0.0%)
Ix
1,930.0 in⁴ (+3.2%)

Closest Iₓ in WT20

WT20x163.5

Weight
163.5 lb/ft (-9.7%)
Depth
20.40 in (+0.5%)
Ix
1,840.0 in⁴ (-1.6%)

Similar weight in WT18

WT18x180.5

Weight
180.5 lb/ft (-0.3%)
Depth
19.00 in (-6.4%)
Ix
1,570.0 in⁴ (-16%)
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Source: AISC Shapes Database v16.0 · Methodology