Steel Beam Sizes / UK / Universal Beams / UB 203×102×23

UB 203×102×23 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 203×102×23 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 15.52 lb/ft 23.10 kg/m
Depth, d 8.00 in 203.20 mm
Flange width, bf 4.01 in 101.80 mm
tw 0.213 in 5.400 mm
tf 0.366 in 9.300 mm
Area 4.56 in² 2,940.00 mm²
Ix 50.45 in⁴ 21,000,000 mm⁴
Iy 3.94 in⁴ 1,640,000 mm⁴
Sx 12.63 in³ 207,000.00 mm³
Sy 1.95 in³ 32,000.00 mm³
Zx 14.28 in³ 234,000.00 mm³
Zy 3.04 in³ 49,800.00 mm³
rx 3.33 in 84.60 mm
ry 0.93 in 23.60 mm
J 0.17 in⁴ 70,200.00 mm⁴
Cw 57.35 in⁶ 15,400,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 203×102×23.

Lighter in Universal beams

UB 254×102×22

Weight
22.0 kg/m (-4.8%)
Depth
254.0 mm (+25%)
Ix
28,400,000 mm⁴ (+35%)

Heavier in Universal beams

UB 305×102×25

Weight
24.8 kg/m (+7.4%)
Depth
305.1 mm (+50%)
Ix
44,600,000 mm⁴ (+112%)

Closest Iₓ in Universal beams

UB 203×133×25

Weight
25.1 kg/m (+8.7%)
Depth
203.2 mm (0.0%)
Ix
23,400,000 mm⁴ (+11%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology