Steel Beam Sizes / AISC / WT Tees / WT4x20

WT4x20 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

WT4x20 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 20.00 lb/ft 29.50 kg/m
Depth, d 4.13 in 105.00 mm
Flange width, bf 8.07 in 205.00 mm
tw 0.360 in 9.140 mm
tf 0.560 in 14.200 mm
Area 5.87 in² 3,790.00 mm²
Ix 5.73 in⁴ 2,390,000 mm⁴
Iy 24.50 in⁴ 10,200,000 mm⁴
Sx 1.69 in³ 27,700.00 mm³
Sy 6.08 in³ 99,600.00 mm³
Zx 3.25 in³ 53,300.00 mm³
Zy 9.24 in³ 151,000.00 mm³
rx 0.99 in 25.10 mm
ry 2.04 in 51.80 mm
J 0.56 in⁴ 232,000.00 mm⁴
Cw 0.72 in⁶ 192,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT4x20.

Lighter in WT4

WT4x17.5

Weight
17.5 lb/ft (-13%)
Depth
4.06 in (-1.7%)
Ix
4.8 in⁴ (-16%)

Heavier in WT4

WT4x24

Weight
24.0 lb/ft (+20%)
Depth
4.25 in (+2.9%)
Ix
6.9 in⁴ (+20%)

Closest Iₓ in WT4

WT4x15.5

Weight
15.5 lb/ft (-23%)
Depth
4.00 in (-3.1%)
Ix
4.3 in⁴ (-25%)

Similar weight in WT5

WT5x19.5

Weight
19.5 lb/ft (-2.5%)
Depth
4.96 in (+20%)
Ix
8.8 in⁴ (+54%)
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Source: AISC Shapes Database v16.0 · Methodology