Steel Beam Sizes / AISC / WT Tees / WT18x80

WT18x80 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

WT18x80 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 80.00 lb/ft 119.00 kg/m
Depth, d 18.00 in 457.00 mm
Flange width, bf 12.00 in 305.00 mm
tw 0.650 in 16.500 mm
tf 1.020 in 25.900 mm
Area 23.50 in² 15,200.00 mm²
Ix 740.00 in⁴ 308,000,000 mm⁴
Iy 147.00 in⁴ 61,200,000 mm⁴
Sx 55.80 in³ 914,000.00 mm³
Sy 24.60 in³ 403,000.00 mm³
Zx 100.00 in³ 1,640,000 mm³
Zy 38.60 in³ 633,000.00 mm³
rx 5.61 in 142.00 mm
ry 2.50 in 63.50 mm
J 6.17 in⁴ 2,570,000 mm⁴
Cw 53.60 in⁶ 14,400,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus WT18x80.

Lighter in WT18

WT18x75

Weight
75.0 lb/ft (-6.3%)
Depth
17.90 in (-0.6%)
Ix
698.0 in⁴ (-5.7%)

Heavier in WT18

WT18x85

Weight
85.0 lb/ft (+6.3%)
Depth
18.10 in (+0.6%)
Ix
786.0 in⁴ (+6.2%)

Closest Iₓ in WT18

WT18x67.5

Weight
67.5 lb/ft (-16%)
Depth
17.80 in (-1.1%)
Ix
637.0 in⁴ (-14%)

Similar weight in WT20

WT20x83.5

Weight
83.5 lb/ft (+4.4%)
Depth
19.30 in (+7.2%)
Ix
899.0 in⁴ (+21%)
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Source: AISC Shapes Database v16.0 · Methodology