Steel Beam Sizes / Europe / RHS / RHS 500×300×12.5

RHS 500×300×12.5 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 500×300×12.5 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 101.47 lb/ft 151.00 kg/m
Height 19.69 in 500.00 mm
Width 11.81 in 300.00 mm
t 0.492 in 12.500 mm
Area 29.76 in² 19,200.00 mm²
Ix 1,580.85 in⁴ 658,000,000 mm⁴
Iy 715.95 in⁴ 298,000,000 mm⁴
Sx 160.49 in³ 2,630,000 mm³
Sy 120.83 in³ 1,980,000 mm³
Zx 195.28 in³ 3,200,000 mm³
Zy 136.69 in³ 2,240,000 mm³
rx 7.28 in 185.00 mm
ry 4.92 in 125.00 mm
J 1,547.22 in⁴ 644,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 500×300×12.5.

Lighter in Rectangular hollow sections

RHS 400×300×14.2

Weight
148.0 kg/m (-2.0%)
Depth
400.0 mm (-20%)
Ix
430,000,000 mm⁴ (-35%)

Heavier in Rectangular hollow sections

RHS 400×300×16

Weight
166.0 kg/m (+9.9%)
Depth
400.0 mm (-20%)
Ix
475,000,000 mm⁴ (-28%)

Closest Iₓ in Rectangular hollow sections

RHS 500×200×16

Weight
166.0 kg/m (+9.9%)
Depth
500.0 mm (0.0%)
Ix
630,000,000 mm⁴ (-4.3%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology