Steel Beam Sizes / AISC / W-Shapes / W21 / W21x101

W21x101 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

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

Units

Section diagram

W21x101 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 101.00 lb/ft 150.00 kg/m
Depth, d 21.40 in 544.00 mm
Flange width, bf 12.30 in 312.00 mm
tw 0.500 in 12.700 mm
tf 0.800 in 20.300 mm
Area 29.80 in² 19,200.00 mm²
Ix 2,420.00 in⁴ 1,010,000,000 mm⁴
Iy 248.00 in⁴ 103,000,000 mm⁴
Sx 227.00 in³ 3,720,000 mm³
Sy 40.30 in³ 660,000.00 mm³
Zx 253.00 in³ 4,150,000 mm³
Zy 61.70 in³ 1,010,000 mm³
rx 9.02 in 229.00 mm
ry 2.89 in 73.40 mm
J 5.21 in⁴ 2,170,000 mm⁴
Cw 26,200.00 in⁶ 7,040,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W21x101.

Browse W21 series →

Lighter in W21

W21x93

Weight
93.0 lb/ft (-7.9%)
Depth
21.60 in (+0.9%)
Ix
2,070.0 in⁴ (-14%)

Heavier in W21

W21x111

Weight
111.0 lb/ft (+9.9%)
Depth
21.50 in (+0.5%)
Ix
2,670.0 in⁴ (+10%)

Closest Iₓ in W21

W21x122

Weight
122.0 lb/ft (+21%)
Depth
21.70 in (+1.4%)
Ix
2,960.0 in⁴ (+22%)

Similar weight in W24

W24x103

Weight
103.0 lb/ft (+2.0%)
Depth
24.50 in (+14%)
Ix
3,000.0 in⁴ (+24%)
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Source: AISC Shapes Database v16.0 · Methodology