Steel Beam Sizes / AISC / WT Tees / WT20x251.5

WT20x251.5 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

WT20x251.5 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 251.50 lb/ft 374.00 kg/m
Depth, d 21.00 in 533.00 mm
Flange width, bf 16.40 in 417.00 mm
tw 1.540 in 39.100 mm
tf 2.760 in 70.100 mm
Area 74.00 in² 47,700.00 mm²
Ix 2,730.00 in⁴ 1,140,000,000 mm⁴
Iy 1,020.00 in⁴ 425,000,000 mm⁴
Sx 174.00 in³ 2,850,000 mm³
Sy 124.00 in³ 2,030,000 mm³
Zx 314.00 in³ 5,150,000 mm³
Zy 197.00 in³ 3,230,000 mm³
rx 6.07 in 154.00 mm
ry 3.72 in 94.50 mm
J 138.00 in⁴ 57,400,000 mm⁴
Cw 1,400.00 in⁶ 376,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT20x251.5.

Lighter in WT20

WT20x215.5

Weight
215.5 lb/ft (-14%)
Depth
20.60 in (-1.9%)
Ix
2,290.0 in⁴ (-16%)

Heavier in WT20

WT20x296.5

Weight
296.5 lb/ft (+18%)
Depth
21.50 in (+2.4%)
Ix
3,310.0 in⁴ (+21%)

Closest Iₓ in WT20

WT20x196

Weight
196.0 lb/ft (-22%)
Depth
20.80 in (-1.0%)
Ix
2,270.0 in⁴ (-17%)

Similar weight in WT18

WT18x243.5

Weight
243.5 lb/ft (-3.2%)
Depth
19.70 in (-6.2%)
Ix
2,220.0 in⁴ (-19%)
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Source: AISC Shapes Database v16.0 · Methodology