Steel Beam Sizes / AISC / WT Tees / WT20x124.5

WT20x124.5 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

WT20x124.5 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 124.50 lb/ft 186.00 kg/m
Depth, d 19.70 in 500.00 mm
Flange width, bf 15.80 in 401.00 mm
tw 0.750 in 19.100 mm
tf 1.420 in 36.100 mm
Area 36.70 in² 23,700.00 mm²
Ix 1,210.00 in⁴ 504,000,000 mm⁴
Iy 463.00 in⁴ 193,000,000 mm⁴
Sx 79.40 in³ 1,300,000 mm³
Sy 58.80 in³ 964,000.00 mm³
Zx 140.00 in³ 2,290,000 mm³
Zy 90.80 in³ 1,490,000 mm³
rx 5.75 in 146.00 mm
ry 3.55 in 90.20 mm
J 19.00 in⁴ 7,910,000 mm⁴
Cw 158.00 in⁶ 42,400,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT20x124.5.

Lighter in WT20

WT20x117.5

Weight
117.5 lb/ft (-5.6%)
Depth
19.80 in (+0.5%)
Ix
1,260.0 in⁴ (+4.1%)

Heavier in WT20

WT20x132

Weight
132.0 lb/ft (+6.0%)
Depth
20.00 in (+1.5%)
Ix
1,450.0 in⁴ (+20%)

Closest Iₓ in WT20

WT20x105.5

Weight
105.5 lb/ft (-15%)
Depth
19.70 in (0.0%)
Ix
1,120.0 in⁴ (-7.4%)

Similar weight in WT18

WT18x123.5

Weight
123.5 lb/ft (-0.8%)
Depth
18.30 in (-7.1%)
Ix
1,040.0 in⁴ (-14%)
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Source: AISC Shapes Database v16.0 · Methodology