Steel Beam Sizes / UK / Universal Beams / UB 203×133×25

UB 203×133×25 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 203×133×25 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 16.87 lb/ft 25.10 kg/m
Depth, d 8.00 in 203.20 mm
Flange width, bf 5.24 in 133.20 mm
tw 0.224 in 5.700 mm
tf 0.307 in 7.800 mm
Area 4.96 in² 3,200.00 mm²
Ix 56.22 in⁴ 23,400,000 mm⁴
Iy 7.40 in⁴ 3,080,000 mm⁴
Sx 14.04 in³ 230,000.00 mm³
Sy 2.81 in³ 46,000.00 mm³
Zx 15.74 in³ 258,000.00 mm³
Zy 4.33 in³ 70,900.00 mm³
rx 3.37 in 85.60 mm
ry 1.22 in 31.00 mm
J 0.14 in⁴ 59,600.00 mm⁴
Cw 109.11 in⁶ 29,300,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 203×133×25.

Lighter in Universal beams

UB 305×102×25

Weight
24.8 kg/m (-1.2%)
Depth
305.1 mm (+50%)
Ix
44,600,000 mm⁴ (+91%)

Heavier in Universal beams

UB 254×102×25

Weight
25.2 kg/m (+0.4%)
Depth
257.2 mm (+27%)
Ix
34,200,000 mm⁴ (+46%)

Closest Iₓ in Universal beams

UB 203×102×23

Weight
23.1 kg/m (-8.0%)
Depth
203.2 mm (0.0%)
Ix
21,000,000 mm⁴ (-10%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology