Steel Beam Sizes / AISC / W-Shapes / W12 / W12x120

W12x120 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

Analyze in Beam Calculator Back to W-Shapes All W12

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

Units

Section diagram

W12x120 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 120.00 lb/ft 179.00 kg/m
Depth, d 13.10 in 333.00 mm
Flange width, bf 12.30 in 312.00 mm
tw 0.710 in 18.000 mm
tf 1.110 in 28.200 mm
Area 35.20 in² 22,700.00 mm²
Ix 1,070.00 in⁴ 445,000,000 mm⁴
Iy 345.00 in⁴ 144,000,000 mm⁴
Sx 163.00 in³ 2,670,000 mm³
Sy 56.00 in³ 918,000.00 mm³
Zx 186.00 in³ 3,050,000 mm³
Zy 85.40 in³ 1,400,000 mm³
rx 5.51 in 140.00 mm
ry 3.13 in 79.50 mm
J 12.90 in⁴ 5,370,000 mm⁴
Cw 12,400.00 in⁶ 3,330,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W12x120.

Browse W12 series →

Lighter in W12

W12x106

Weight
106.0 lb/ft (-12%)
Depth
12.90 in (-1.5%)
Ix
933.0 in⁴ (-13%)

Heavier in W12

W12x136

Weight
136.0 lb/ft (+13%)
Depth
13.40 in (+2.3%)
Ix
1,240.0 in⁴ (+16%)

Closest Iₓ in W12

W12x96

Weight
96.0 lb/ft (-20%)
Depth
12.70 in (-3.1%)
Ix
833.0 in⁴ (-22%)

Similar weight in W14

W14x120

Weight
120.0 lb/ft (0.0%)
Depth
14.50 in (+11%)
Ix
1,380.0 in⁴ (+29%)
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Source: AISC Shapes Database v16.0 · Methodology