Steel Beam Sizes / UK / RHS / RHS 300×100×5

RHS 300×100×5 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 300×100×5 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 20.43 lb/ft 30.40 kg/m
Height 11.81 in 300.00 mm
Width 3.94 in 100.00 mm
t 0.197 in 5.000 mm
Area 6.00 in² 3,870.00 mm²
Ix 99.70 in⁴ 41,500,000 mm⁴
Iy 17.56 in⁴ 7,310,000 mm⁴
Sx 16.84 in³ 276,000.00 mm³
Sy 8.91 in³ 146,000.00 mm³
Zx 21.60 in³ 354,000.00 mm³
Zy 9.82 in³ 161,000.00 mm³
rx 4.06 in 103.00 mm
ry 1.71 in 43.40 mm
J 49.01 in⁴ 20,400,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 300×100×5.

Lighter in Rectangular hollow sections

RHS 160×80×8.8

Weight
30.1 kg/m (-1.0%)
Depth
160.0 mm (-47%)
Ix
11,700,000 mm⁴ (-72%)

Heavier in Rectangular hollow sections

RHS 200×100×7.1

Weight
31.4 kg/m (+3.3%)
Depth
200.0 mm (-33%)
Ix
20,200,000 mm⁴ (-51%)

Closest Iₓ in Rectangular hollow sections

RHS 220×120×11

Weight
53.9 kg/m (+77%)
Depth
220.0 mm (-27%)
Ix
41,400,000 mm⁴ (-0.2%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology