Steel Beam Sizes / UK / Universal Beams / UB 305×165×40

UB 305×165×40 Steel Beam Dimensions and Properties

UK Universal beams · v2023.11

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

Units

Section diagram

UB 305×165×40 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 27.08 lb/ft 40.30 kg/m
Depth, d 11.94 in 303.40 mm
Flange width, bf 6.50 in 165.00 mm
tw 0.236 in 6.000 mm
tf 0.402 in 10.200 mm
Area 7.95 in² 5,130.00 mm²
Ix 204.21 in⁴ 85,000,000 mm⁴
Iy 18.36 in⁴ 7,640,000 mm⁴
Sx 34.17 in³ 560,000.00 mm³
Sy 5.68 in³ 93,000.00 mm³
Zx 38.02 in³ 623,000.00 mm³
Zy 8.67 in³ 142,000.00 mm³
rx 5.08 in 129.00 mm
ry 1.52 in 38.60 mm
J 0.35 in⁴ 147,000.00 mm⁴
Cw 610.72 in⁶ 164,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 305×165×40.

Lighter in Universal beams

UB 356×127×39

Weight
39.1 kg/m (-3.0%)
Depth
353.4 mm (+16%)
Ix
102,000,000 mm⁴ (+20%)

Heavier in Universal beams

UB 305×127×42

Weight
41.9 kg/m (+4.0%)
Depth
307.2 mm (+1.3%)
Ix
82,000,000 mm⁴ (-3.5%)

Closest Iₓ in Universal beams

UB 356×127×33

Weight
33.1 kg/m (-18%)
Depth
349.0 mm (+15%)
Ix
82,500,000 mm⁴ (-2.9%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology