Steel Beam Sizes / AISC / W-Shapes / W21 / W21x50

W21x50 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

Analyze in Beam Calculator Back to W-Shapes All W21

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

Units

Section diagram

W21x50 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 20.80 in 528.00 mm
Flange width, bf 6.53 in 166.00 mm
tw 0.380 in 9.650 mm
tf 0.535 in 13.600 mm
Area 14.70 in² 9,480.00 mm²
Ix 984.00 in⁴ 410,000,000 mm⁴
Iy 24.90 in⁴ 10,400,000 mm⁴
Sx 94.50 in³ 1,550,000 mm³
Sy 7.64 in³ 125,000.00 mm³
Zx 110.00 in³ 1,800,000 mm³
Zy 12.20 in³ 200,000.00 mm³
rx 8.18 in 208.00 mm
ry 1.30 in 33.00 mm
J 1.14 in⁴ 475,000.00 mm⁴
Cw 2,570.00 in⁶ 690,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W21x50.

Browse W21 series →

Lighter in W21

W21x48

Weight
48.0 lb/ft (-4.0%)
Depth
20.60 in (-1.0%)
Ix
959.0 in⁴ (-2.5%)

Heavier in W21

W21x55

Weight
55.0 lb/ft (+10%)
Depth
20.80 in (0.0%)
Ix
1,140.0 in⁴ (+16%)

Closest Iₓ in W21

W21x44

Weight
44.0 lb/ft (-12%)
Depth
20.70 in (-0.5%)
Ix
843.0 in⁴ (-14%)

Similar weight in W18

W18x50

Weight
50.0 lb/ft (0.0%)
Depth
18.00 in (-13%)
Ix
800.0 in⁴ (-19%)
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Source: AISC Shapes Database v16.0 · Methodology