Steel Beam Sizes / AISC / W-Shapes / W21 / W21x68

W21x68 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

W21x68 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 68.00 lb/ft 101.00 kg/m
Depth, d 21.10 in 536.00 mm
Flange width, bf 8.27 in 210.00 mm
tw 0.430 in 10.900 mm
tf 0.685 in 17.400 mm
Area 20.00 in² 12,900.00 mm²
Ix 1,480.00 in⁴ 616,000,000 mm⁴
Iy 64.70 in⁴ 26,900,000 mm⁴
Sx 140.00 in³ 2,290,000 mm³
Sy 15.70 in³ 257,000.00 mm³
Zx 160.00 in³ 2,620,000 mm³
Zy 24.40 in³ 400,000.00 mm³
rx 8.60 in 218.00 mm
ry 1.80 in 45.70 mm
J 2.45 in⁴ 1,020,000 mm⁴
Cw 6,760.00 in⁶ 1,820,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W21x68.

Browse W21 series →

Lighter in W21

W21x62

Weight
62.0 lb/ft (-8.8%)
Depth
21.00 in (-0.5%)
Ix
1,330.0 in⁴ (-10%)

Heavier in W21

W21x73

Weight
73.0 lb/ft (+7.4%)
Depth
21.20 in (+0.5%)
Ix
1,600.0 in⁴ (+8.1%)

Closest Iₓ in W21

W21x57

Weight
57.0 lb/ft (-16%)
Depth
21.10 in (0.0%)
Ix
1,170.0 in⁴ (-21%)

Similar weight in W24

W24x68

Weight
68.0 lb/ft (0.0%)
Depth
23.70 in (+12%)
Ix
1,830.0 in⁴ (+24%)
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Source: AISC Shapes Database v16.0 · Methodology