Steel Beam Sizes / UK / Angles / L 120×120×12

L 120×120×12 Steel Beam Dimensions and Properties

UK Angles · v2023.11

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

Units

Section diagram

L 120×120×12 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 14.51 lb/ft 21.60 kg/m
Width 4.72 in 120.00 mm
Height 4.72 in 120.00 mm
t 0.472 in 12.000 mm
Area 4.26 in² 2,750.00 mm²
Ix 8.84 in⁴ 3,680,000 mm⁴
Iy 8.84 in⁴ 3,680,000 mm⁴
Sx 2.61 in³ 42,700.00 mm³
Sy 2.61 in³ 42,700.00 mm³
rx 1.44 in 36.50 mm
ry 1.44 in 36.50 mm
J 0.34 in⁴ 142,000.00 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus L 120×120×12.

Lighter in Angles

L 140×140×10

Weight
21.4 kg/m (-0.9%)
Depth
140.0 mm (+17%)
Ix
5,040,000 mm⁴ (+37%)

Heavier in Angles

L 130×130×11

Weight
21.7 kg/m (+0.5%)
Depth
130.0 mm (+8.3%)
Ix
4,370,000 mm⁴ (+19%)

Closest Iₓ in Angles

L 130×130×9

Weight
17.9 kg/m (-17%)
Depth
130.0 mm (+8.3%)
Ix
3,640,000 mm⁴ (-1.1%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Eurocode 3 - UK National Annex · Methodology