Steel Beam Sizes / UK / RHS / RHS 300×200×12.5

RHS 300×200×12.5 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 300×200×12.5 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 11.81 in 300.00 mm
Width 7.87 in 200.00 mm
t 0.492 in 12.500 mm
Area 18.14 in² 11,700.00 mm²
Ix 343.56 in⁴ 143,000,000 mm⁴
Iy 181.15 in⁴ 75,400,000 mm⁴
Sx 58.09 in³ 952,000.00 mm³
Sy 46.01 in³ 754,000.00 mm³
Zx 70.79 in³ 1,160,000 mm³
Zy 53.52 in³ 877,000.00 mm³
rx 4.33 in 110.00 mm
ry 3.16 in 80.20 mm
J 377.19 in⁴ 157,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 300×200×12.5.

Lighter in Rectangular hollow sections

RHS 250×150×16

Weight
90.3 kg/m (-1.7%)
Depth
250.0 mm (-17%)
Ix
88,800,000 mm⁴ (-38%)

Heavier in Rectangular hollow sections

RHS 400×300×8.8

Weight
93.6 kg/m (+1.8%)
Depth
400.0 mm (+33%)
Ix
281,000,000 mm⁴ (+97%)

Closest Iₓ in Rectangular hollow sections

RHS 350×150×10

Weight
74.5 kg/m (-19%)
Depth
350.0 mm (+17%)
Ix
143,000,000 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