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

UB 920×420×420 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 920×420×420 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 282.23 lb/ft 420.00 kg/m
Depth, d 37.13 in 943.00 mm
Flange width, bf 16.61 in 422.00 mm
tw 0.886 in 22.500 mm
tf 1.571 in 39.900 mm
Area 82.77 in² 53,400.00 mm²
Ix 19,532.40 in⁴ 8,130,000,000 mm⁴
Iy 1,203.66 in⁴ 501,000,000 mm⁴
Sx 1,049.61 in³ 17,200,000 mm³
Sy 144.63 in³ 2,370,000 mm³
Zx 1,189.96 in³ 19,500,000 mm³
Zy 223.96 in³ 3,670,000 mm³
rx 15.35 in 390.00 mm
ry 3.81 in 96.80 mm
J 51.65 in⁴ 21,500,000 mm⁴
Cw 380,209.92 in⁶ 102,100,000,000,000 mm⁶

Alternatives

Useful nearby sections

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

Lighter in Universal beams

UB 1016×305×415

Weight
415.0 kg/m (-1.2%)
Depth
1,020.0 mm (+8.2%)
Ix
8,530,000,000 mm⁴ (+4.9%)

Heavier in Universal beams

UB 914×305×425

Weight
425.0 kg/m (+1.2%)
Depth
961.0 mm (+1.9%)
Ix
7,880,000,000 mm⁴ (-3.1%)

Closest Iₓ in Universal beams

UB 1000×400×371

Weight
371.0 kg/m (-12%)
Depth
1,000.0 mm (+6.0%)
Ix
8,140,000,000 mm⁴ (+0.1%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology