Steel Beam Sizes / Europe / RHS / RHS 80×40×3.6

RHS 80×40×3.6 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 80×40×3.6 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 4.21 lb/ft 6.27 kg/m
Height 3.15 in 80.00 mm
Width 1.57 in 40.00 mm
t 0.142 in 3.600 mm
Area 1.24 in² 798.00 mm²
Ix 1.51 in⁴ 628,000.00 mm⁴
Iy 0.49 in⁴ 206,000.00 mm⁴
Sx 0.96 in³ 15,700.00 mm³
Sy 0.63 in³ 10,300.00 mm³
Zx 1.22 in³ 20,000.00 mm³
Zy 0.74 in³ 12,100.00 mm³
rx 1.11 in 28.10 mm
ry 0.63 in 16.10 mm
J 1.22 in⁴ 508,000.00 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 80×40×3.6.

Lighter in Rectangular hollow sections

RHS 90×50×3

Weight
6.2 kg/m (-0.5%)
Depth
90.0 mm (+13%)
Ix
844,000 mm⁴ (+34%)

Heavier in Rectangular hollow sections

RHS 50×30×6.3

Weight
6.3 kg/m (+1.0%)
Depth
50.0 mm (-37%)
Ix
206,000 mm⁴ (-67%)

Closest Iₓ in Rectangular hollow sections

RHS 80×40×4

Weight
6.9 kg/m (+10%)
Depth
80.0 mm (0.0%)
Ix
682,000 mm⁴ (+8.6%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology