Steel Beam Sizes / Europe / RHS / RHS 350×150×12.5

RHS 350×150×12.5 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 350×150×12.5 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 61.75 lb/ft 91.90 kg/m
Height 13.78 in 350.00 mm
Width 5.91 in 150.00 mm
t 0.492 in 12.500 mm
Area 18.14 in² 11,700.00 mm²
Ix 415.63 in⁴ 173,000,000 mm⁴
Iy 106.91 in⁴ 44,500,000 mm⁴
Sx 60.29 in³ 988,000.00 mm³
Sy 36.19 in³ 593,000.00 mm³
Zx 76.89 in³ 1,260,000 mm³
Zy 41.86 in³ 686,000.00 mm³
rx 4.80 in 122.00 mm
ry 2.43 in 61.70 mm
J 278.69 in⁴ 116,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 350×150×12.5.

Lighter in Rectangular hollow sections

RHS 250×150×16

Weight
90.3 kg/m (-1.7%)
Depth
250.0 mm (-29%)
Ix
88,800,000 mm⁴ (-49%)

Heavier in Rectangular hollow sections

RHS 400×300×8.8

Weight
93.6 kg/m (+1.8%)
Depth
400.0 mm (+14%)
Ix
281,000,000 mm⁴ (+62%)

Closest Iₓ in Rectangular hollow sections

RHS 300×200×16

Weight
115.0 kg/m (+25%)
Depth
300.0 mm (-14%)
Ix
174,000,000 mm⁴ (+0.6%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology