Steel Beam Sizes / AISC / W-Shapes / W18 / W18x158

W18x158 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

W18x158 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 158.00 lb/ft 235.00 kg/m
Depth, d 19.70 in 500.00 mm
Flange width, bf 11.30 in 287.00 mm
tw 0.810 in 20.600 mm
tf 1.440 in 36.600 mm
Area 46.30 in² 29,900.00 mm²
Ix 3,060.00 in⁴ 1,270,000,000 mm⁴
Iy 347.00 in⁴ 144,000,000 mm⁴
Sx 310.00 in³ 5,080,000 mm³
Sy 61.40 in³ 1,010,000 mm³
Zx 356.00 in³ 5,830,000 mm³
Zy 94.80 in³ 1,550,000 mm³
rx 8.12 in 206.00 mm
ry 2.74 in 69.60 mm
J 25.20 in⁴ 10,500,000 mm⁴
Cw 29,000.00 in⁶ 7,790,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W18x158.

Browse W18 series →

Lighter in W18

W18x143

Weight
143.0 lb/ft (-9.5%)
Depth
19.50 in (-1.0%)
Ix
2,750.0 in⁴ (-10%)

Heavier in W18

W18x175

Weight
175.0 lb/ft (+11%)
Depth
20.00 in (+1.5%)
Ix
3,450.0 in⁴ (+13%)

Closest Iₓ in W18

W18x130

Weight
130.0 lb/ft (-18%)
Depth
19.30 in (-2.0%)
Ix
2,460.0 in⁴ (-20%)

Similar weight in W21

W21x166

Weight
166.0 lb/ft (+5.1%)
Depth
22.50 in (+14%)
Ix
4,280.0 in⁴ (+40%)
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Source: AISC Shapes Database v16.0 · Methodology