Steel Beam Sizes / UK / Universal Beams / UB 1000×400×321

UB 1000×400×321 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 1000×400×321 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 215.70 lb/ft 321.00 kg/m
Depth, d 38.98 in 990.00 mm
Flange width, bf 15.75 in 400.00 mm
tw 0.650 in 16.500 mm
tf 1.220 in 31.000 mm
Area 63.40 in² 40,900.00 mm²
Ix 16,721.47 in⁴ 6,960,000,000 mm⁴
Iy 795.23 in⁴ 331,000,000 mm⁴
Sx 860.43 in³ 14,100,000 mm³
Sy 101.30 in³ 1,660,000 mm³
Zx 964.18 in³ 15,800,000 mm³
Zy 156.22 in³ 2,560,000 mm³
rx 16.26 in 413.00 mm
ry 3.54 in 90.00 mm
J 24.75 in⁴ 10,300,000 mm⁴
Cw 283,016.20 in⁶ 76,000,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 1000×400×321.

Lighter in Universal beams

UB 1016×305×314

Weight
314.0 kg/m (-2.2%)
Depth
1,000.0 mm (+1.0%)
Ix
6,440,000,000 mm⁴ (-7.5%)

Heavier in Universal beams

UB 1100×400×343

Weight
343.0 kg/m (+6.9%)
Depth
1,090.0 mm (+10%)
Ix
8,780,000,000 mm⁴ (+26%)

Closest Iₓ in Universal beams

UB 914×305×381

Weight
381.0 kg/m (+19%)
Depth
951.0 mm (-3.9%)
Ix
6,970,000,000 mm⁴ (+0.1%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology