Steel Beam Sizes / CISC / W-Shapes / W840×251

W840×251 Steel Beam Dimensions and Properties

CISC Wide flange · v12.1

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

Units

Section diagram

W840×251 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 169.00 lb/ft 251.00 kg/m
Depth, d 33.82 in 859.00 mm
Flange width, bf 11.50 in 292.00 mm
tw 0.669 in 17.000 mm
tf 1.220 in 31.000 mm
Area 49.45 in² 31,900.00 mm²
Ix 9,273.69 in⁴ 3,860,000,000 mm⁴
Iy 309.92 in⁴ 129,000,000 mm⁴
Sx 549.21 in³ 9,000,000 mm³
Sy 53.94 in³ 884,000.00 mm³
Zx 628.54 in³ 10,300,000 mm³
Zy 84.21 in³ 1,380,000 mm³
rx 13.70 in 348.00 mm
ry 2.50 in 63.60 mm
J 17.66 in⁴ 7,350,000 mm⁴
Cw 82,298.13 in⁶ 22,100,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W840×251.

Lighter in W840

W840×226

Weight
226.0 kg/m (-10%)
Depth
851.0 mm (-0.9%)
Ix
3,400,000,000 mm⁴ (-12%)

Heavier in W840

W840×299

Weight
299.0 kg/m (+19%)
Depth
855.0 mm (-0.5%)
Ix
4,800,000,000 mm⁴ (+24%)

Closest Iₓ in W840

W840×210

Weight
210.0 kg/m (-17%)
Depth
846.0 mm (-1.5%)
Ix
3,110,000,000 mm⁴ (-19%)

Similar weight in W920

W920×253

Weight
253.0 kg/m (+0.6%)
Depth
919.0 mm (+7.0%)
Ix
4,370,000,000 mm⁴ (+13%)
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Source: CISC Structural Section Tables SST12.1 · v12.1 · Availability: Not produced in Canada. · Methodology