Steel Beam Sizes / UK / Universal Beams / UB 920×420×787

UB 920×420×787 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 920×420×787 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 528.84 lb/ft 787.00 kg/m
Depth, d 39.80 in 1,011.00 mm
Flange width, bf 17.20 in 437.00 mm
tw 1.610 in 40.900 mm
tf 2.909 in 73.900 mm
Area 155.31 in² 100,200.00 mm²
Ix 39,545.31 in⁴ 16,460,000,000 mm⁴
Iy 2,474.58 in⁴ 1,030,000,000 mm⁴
Sx 1,989.37 in³ 32,600,000 mm³
Sy 288.64 in³ 4,730,000 mm³
Zx 2,318.90 in³ 38,000,000 mm³
Zy 452.80 in³ 7,420,000 mm³
rx 15.94 in 405.00 mm
ry 4.02 in 102.00 mm
J 321.94 in⁴ 134,000,000 mm⁴
Cw 844,579.92 in⁶ 226,800,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 920×420×787.

Lighter in Universal beams

UB 1000×400×748

Weight
748.0 kg/m (-5.0%)
Depth
1,068.0 mm (+5.6%)
Ix
17,320,000,000 mm⁴ (+5.2%)

Heavier in Universal beams

UB 1000×400×883

Weight
883.0 kg/m (+12%)
Depth
1,092.0 mm (+8.0%)
Ix
20,960,000,000 mm⁴ (+27%)

Closest Iₓ in Universal beams

UB 1100×400×607

Weight
607.0 kg/m (-23%)
Depth
1,138.0 mm (+13%)
Ix
16,240,000,000 mm⁴ (-1.3%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology