Steel Beam Sizes / UK / Universal Beams / UB 356×171×45

UB 356×171×45 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 356×171×45 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 30.24 lb/ft 45.00 kg/m
Depth, d 13.83 in 351.40 mm
Flange width, bf 6.74 in 171.10 mm
tw 0.276 in 7.000 mm
tf 0.382 in 9.700 mm
Area 8.88 in² 5,730.00 mm²
Ix 290.70 in⁴ 121,000,000 mm⁴
Iy 19.48 in⁴ 8,110,000 mm⁴
Sx 41.92 in³ 687,000.00 mm³
Sy 5.80 in³ 95,000.00 mm³
Zx 47.29 in³ 775,000.00 mm³
Zy 8.97 in³ 147,000.00 mm³
rx 5.71 in 145.00 mm
ry 1.48 in 37.60 mm
J 0.38 in⁴ 158,000.00 mm⁴
Cw 878.84 in⁶ 236,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 356×171×45.

Lighter in Universal beams

UB 254×146×43

Weight
43.0 kg/m (-4.4%)
Depth
259.6 mm (-26%)
Ix
65,400,000 mm⁴ (-46%)

Heavier in Universal beams

UB 406×140×46

Weight
46.0 kg/m (+2.2%)
Depth
403.2 mm (+15%)
Ix
157,000,000 mm⁴ (+30%)

Closest Iₓ in Universal beams

UB 406×140×39

Weight
39.0 kg/m (-13%)
Depth
398.0 mm (+13%)
Ix
125,000,000 mm⁴ (+3.3%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology