Steel Beam Sizes / UK / Universal Columns / UC 305×305×118

UC 305×305×118 Steel Beam Dimensions and Properties

UK Universal columns · v2023.11

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

Units

Section diagram

UC 305×305×118 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 79.29 lb/ft 118.00 kg/m
Depth, d 12.38 in 314.50 mm
Flange width, bf 12.10 in 307.40 mm
tw 0.472 in 12.000 mm
tf 0.736 in 18.700 mm
Area 23.25 in² 15,000.00 mm²
Ix 665.50 in⁴ 277,000,000 mm⁴
Iy 217.67 in⁴ 90,600,000 mm⁴
Sx 107.40 in³ 1,760,000 mm³
Sy 35.94 in³ 589,000.00 mm³
Zx 119.61 in³ 1,960,000 mm³
Zy 54.62 in³ 895,000.00 mm³
rx 5.35 in 136.00 mm
ry 3.06 in 77.70 mm
J 3.87 in⁴ 1,610,000 mm⁴
Cw 7,373.32 in⁶ 1,980,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UC 305×305×118.

Lighter in Universal columns

UC 254×254×107

Weight
107.0 kg/m (-9.3%)
Depth
266.7 mm (-15%)
Ix
175,000,000 mm⁴ (-37%)

Heavier in Universal columns

UC 356×368×129

Weight
129.0 kg/m (+9.3%)
Depth
355.6 mm (+13%)
Ix
402,000,000 mm⁴ (+45%)

Closest Iₓ in Universal columns

UC 254×254×167

Weight
167.0 kg/m (+42%)
Depth
289.1 mm (-8.1%)
Ix
300,000,000 mm⁴ (+8.3%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology