Steel Beam Sizes / UK / RHS / RHS 80×40×5

RHS 80×40×5 Steel Beam Dimensions and Properties

UK Rectangular hollow sections · v2023.11

Analyze in Beam Calculator Back to RHS

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

Units

Section diagram

RHS 80×40×5 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 5.66 lb/ft 8.42 kg/m
Height 3.15 in 80.00 mm
Width 1.57 in 40.00 mm
t 0.197 in 5.000 mm
Area 1.66 in² 1,070.00 mm²
Ix 1.93 in⁴ 803,000.00 mm⁴
Iy 0.62 in⁴ 257,000.00 mm⁴
Sx 1.23 in³ 20,100.00 mm³
Sy 0.79 in³ 12,900.00 mm³
Zx 1.59 in³ 26,100.00 mm³
Zy 0.96 in³ 15,700.00 mm³
rx 1.08 in 27.40 mm
ry 0.61 in 15.50 mm
J 1.56 in⁴ 651,000.00 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RHS 80×40×5.

Lighter in Rectangular hollow sections

RHS 60×40×6.3

Weight
8.3 kg/m (-1.3%)
Depth
60.0 mm (-25%)
Ix
434,000 mm⁴ (-46%)

Heavier in Rectangular hollow sections

RHS 100×60×3.6

Weight
8.5 kg/m (+1.3%)
Depth
100.0 mm (+25%)
Ix
1,450,000 mm⁴ (+81%)

Closest Iₓ in Rectangular hollow sections

RHS 90×50×3

Weight
6.2 kg/m (-26%)
Depth
90.0 mm (+13%)
Ix
844,000 mm⁴ (+5.1%)
Analyze in Beam Calculator Compare in RHS finder

Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology