Steel Beam Sizes / Europe / SHS / SHS 120×120×12.5

SHS 120×120×12.5 Steel Beam Dimensions and Properties

EN Square hollow sections · v2026.1

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

Units

Section diagram

SHS 120×120×12.5 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 27.48 lb/ft 40.90 kg/m
Height 4.72 in 120.00 mm
Width 4.72 in 120.00 mm
t 0.492 in 12.500 mm
Area 8.08 in² 5,210.00 mm²
Ix 23.59 in⁴ 9,820,000 mm⁴
Iy 23.59 in⁴ 9,820,000 mm⁴
Sx 10.01 in³ 164,000.00 mm³
Sy 10.01 in³ 164,000.00 mm³
Zx 12.63 in³ 207,000.00 mm³
Zy 12.63 in³ 207,000.00 mm³
rx 1.71 in 43.40 mm
ry 1.71 in 43.40 mm
J 38.92 in⁴ 16,200,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus SHS 120×120×12.5.

Lighter in Square hollow sections

SHS 140×140×10

Weight
40.0 kg/m (-2.2%)
Depth
140.0 mm (+17%)
Ix
14,200,000 mm⁴ (+45%)

Heavier in Square hollow sections

SHS 160×160×8.8

Weight
41.1 kg/m (+0.5%)
Depth
160.0 mm (+33%)
Ix
19,800,000 mm⁴ (+102%)

Closest Iₓ in Square hollow sections

SHS 140×140×6.3

Weight
26.1 kg/m (-36%)
Depth
140.0 mm (+17%)
Ix
9,840,000 mm⁴ (+0.2%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology