Steel Beam Sizes / Europe / RHS / RHS 120×80×3.6

RHS 120×80×3.6 Steel Beam Dimensions and Properties

EN Rectangular hollow sections · v2026.1

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

Units

Section diagram

RHS 120×80×3.6 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 7.26 lb/ft 10.80 kg/m
Height 4.72 in 120.00 mm
Width 3.15 in 80.00 mm
t 0.142 in 3.600 mm
Area 2.12 in² 1,370.00 mm²
Ix 6.63 in⁴ 2,760,000 mm⁴
Iy 3.53 in⁴ 1,470,000 mm⁴
Sx 2.81 in³ 46,000.00 mm³
Sy 2.24 in³ 36,700.00 mm³
Zx 3.39 in³ 55,600.00 mm³
Zy 2.56 in³ 42,000.00 mm³
rx 1.76 in 44.80 mm
ry 1.29 in 32.70 mm
J 7.23 in⁴ 3,010,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 120×80×3.6.

Lighter in Rectangular hollow sections

RHS 120×60×4

Weight
10.7 kg/m (-0.9%)
Depth
120.0 mm (0.0%)
Ix
2,490,000 mm⁴ (-9.8%)

Heavier in Rectangular hollow sections

RHS 90×50×5.6

Weight
11.1 kg/m (+2.8%)
Depth
90.0 mm (-25%)
Ix
1,380,000 mm⁴ (-50%)

Closest Iₓ in Rectangular hollow sections

RHS 100×60×8.8

Weight
19.0 kg/m (+76%)
Depth
100.0 mm (-17%)
Ix
2,790,000 mm⁴ (+1.1%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology