Steel Beam Sizes / AISC / W-Shapes / W18 / W18x50

W18x50 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

Analyze in Beam Calculator Back to W-Shapes All W18

Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

W18x50 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 50.00 lb/ft 74.00 kg/m
Depth, d 18.00 in 457.00 mm
Flange width, bf 7.50 in 191.00 mm
tw 0.355 in 9.020 mm
tf 0.570 in 14.500 mm
Area 14.70 in² 9,480.00 mm²
Ix 800.00 in⁴ 333,000,000 mm⁴
Iy 40.10 in⁴ 16,700,000 mm⁴
Sx 88.90 in³ 1,460,000 mm³
Sy 10.70 in³ 175,000.00 mm³
Zx 101.00 in³ 1,660,000 mm³
Zy 16.60 in³ 272,000.00 mm³
rx 7.38 in 187.00 mm
ry 1.65 in 41.90 mm
J 1.24 in⁴ 516,000.00 mm⁴
Cw 3,040.00 in⁶ 816,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W18x50.

Browse W18 series →

Lighter in W18

W18x46

Weight
46.0 lb/ft (-8.0%)
Depth
18.10 in (+0.6%)
Ix
712.0 in⁴ (-11%)

Heavier in W18

W18x55

Weight
55.0 lb/ft (+10%)
Depth
18.10 in (+0.6%)
Ix
890.0 in⁴ (+11%)

Closest Iₓ in W18

W18x60

Weight
60.0 lb/ft (+20%)
Depth
18.20 in (+1.1%)
Ix
984.0 in⁴ (+23%)

Similar weight in W21

W21x50

Weight
50.0 lb/ft (0.0%)
Depth
20.80 in (+16%)
Ix
984.0 in⁴ (+23%)
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Source: AISC Shapes Database v16.0 · Methodology