Steel Beam Sizes / UK / RHS / RHS 350×250×12.5

RHS 350×250×12.5 Steel Beam Dimensions and Properties

UK Rectangular hollow sections · v2023.11

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

Units

Section diagram

RHS 350×250×12.5 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 75.26 lb/ft 112.00 kg/m
Height 13.78 in 350.00 mm
Width 9.84 in 250.00 mm
t 0.492 in 12.500 mm
Area 22.01 in² 14,200.00 mm²
Ix 586.21 in⁴ 244,000,000 mm⁴
Iy 345.96 in⁴ 144,000,000 mm⁴
Sx 85.43 in³ 1,400,000 mm³
Sy 70.79 in³ 1,160,000 mm³
Zx 102.52 in³ 1,680,000 mm³
Zy 81.16 in³ 1,330,000 mm³
rx 5.16 in 131.00 mm
ry 3.98 in 101.00 mm
J 684.72 in⁴ 285,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 350×250×12.5.

Lighter in Rectangular hollow sections

RHS 500×300×8.8

Weight
107.0 kg/m (-4.5%)
Depth
500.0 mm (+43%)
Ix
478,000,000 mm⁴ (+96%)

Heavier in Rectangular hollow sections

RHS 300×200×16

Weight
115.0 kg/m (+2.7%)
Depth
300.0 mm (-14%)
Ix
174,000,000 mm⁴ (-29%)

Closest Iₓ in Rectangular hollow sections

RHS 400×150×12.5

Weight
102.0 kg/m (-8.9%)
Depth
400.0 mm (+14%)
Ix
244,000,000 mm⁴ (0.0%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology