Steel Beam Sizes / AISC / W-Shapes / W21 / W21x57

W21x57 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

W21x57 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 57.00 lb/ft 85.00 kg/m
Depth, d 21.10 in 536.00 mm
Flange width, bf 6.56 in 167.00 mm
tw 0.405 in 10.300 mm
tf 0.650 in 16.500 mm
Area 16.70 in² 10,800.00 mm²
Ix 1,170.00 in⁴ 487,000,000 mm⁴
Iy 30.60 in⁴ 12,700,000 mm⁴
Sx 111.00 in³ 1,820,000 mm³
Sy 9.35 in³ 153,000.00 mm³
Zx 129.00 in³ 2,110,000 mm³
Zy 14.80 in³ 243,000.00 mm³
rx 8.36 in 212.00 mm
ry 1.35 in 34.30 mm
J 1.77 in⁴ 737,000.00 mm⁴
Cw 3,190.00 in⁶ 857,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W21x57.

Browse W21 series →

Lighter in W21

W21x55

Weight
55.0 lb/ft (-3.5%)
Depth
20.80 in (-1.4%)
Ix
1,140.0 in⁴ (-2.6%)

Heavier in W21

W21x62

Weight
62.0 lb/ft (+8.8%)
Depth
21.00 in (-0.5%)
Ix
1,330.0 in⁴ (+14%)

Closest Iₓ in W21

W21x50

Weight
50.0 lb/ft (-12%)
Depth
20.80 in (-1.4%)
Ix
984.0 in⁴ (-16%)

Similar weight in W24

W24x55

Weight
55.0 lb/ft (-3.5%)
Depth
23.60 in (+12%)
Ix
1,350.0 in⁴ (+15%)
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Source: AISC Shapes Database v16.0 · Methodology