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RHS 180×100×8 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 180×100×8 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 21.91 lb/ft 32.60 kg/m
Height 7.09 in 180.00 mm
Width 3.94 in 100.00 mm
t 0.315 in 8.000 mm
Area 6.45 in² 4,160.00 mm²
Ix 41.08 in⁴ 17,100,000 mm⁴
Iy 16.12 in⁴ 6,710,000 mm⁴
Sx 11.59 in³ 190,000.00 mm³
Sy 8.18 in³ 134,000.00 mm³
Zx 14.58 in³ 239,000.00 mm³
Zy 9.58 in³ 157,000.00 mm³
rx 2.53 in 64.20 mm
ry 1.58 in 40.20 mm
J 37.48 in⁴ 15,600,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 180×100×8.

Lighter in Rectangular hollow sections

RHS 150×100×8.8

Weight
31.5 kg/m (-3.4%)
Depth
150.0 mm (-17%)
Ix
11,700,000 mm⁴ (-32%)

Heavier in Rectangular hollow sections

RHS 200×150×6.3

Weight
33.0 kg/m (+1.2%)
Depth
200.0 mm (+11%)
Ix
24,200,000 mm⁴ (+42%)

Closest Iₓ in Rectangular hollow sections

RHS 180×60×12.5

Weight
40.9 kg/m (+25%)
Depth
180.0 mm (0.0%)
Ix
16,800,000 mm⁴ (-1.8%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Hot-finished hollow sections · Methodology