Steel Beam Sizes / UK / Universal Beams / UB 686×254×140

UB 686×254×140 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 686×254×140 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 94.08 lb/ft 140.00 kg/m
Depth, d 26.91 in 683.50 mm
Flange width, bf 9.99 in 253.70 mm
tw 0.488 in 12.400 mm
tf 0.748 in 19.000 mm
Area 27.59 in² 17,800.00 mm²
Ix 3,267.41 in⁴ 1,360,000,000 mm⁴
Iy 124.45 in⁴ 51,800,000 mm⁴
Sx 243.48 in³ 3,990,000 mm³
Sy 24.96 in³ 409,000.00 mm³
Zx 278.27 in³ 4,560,000 mm³
Zy 38.93 in³ 638,000.00 mm³
rx 10.87 in 276.00 mm
ry 2.12 in 53.90 mm
J 4.06 in⁴ 1,690,000 mm⁴
Cw 21,263.45 in⁶ 5,710,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 686×254×140.

Lighter in Universal beams

UB 533×210×138

Weight
138.0 kg/m (-1.4%)
Depth
549.0 mm (-20%)
Ix
862,000,000 mm⁴ (-37%)

Heavier in Universal beams

UB 762×267×147

Weight
147.0 kg/m (+5.0%)
Depth
754.0 mm (+10%)
Ix
1,680,000,000 mm⁴ (+24%)

Closest Iₓ in Universal beams

UB 610×305×149

Weight
149.0 kg/m (+6.4%)
Depth
612.4 mm (-10%)
Ix
1,260,000,000 mm⁴ (-7.4%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology