Steel Beam Sizes / Europe / HD Sections / HD 400×990

HD 400×990 Steel Beam Dimensions and Properties

EN HD wide flange columns · v2026.1

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

HD 400×990 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 665.25 lb/ft 990.00 kg/m
Depth, d 21.65 in 550.00 mm
Flange width, bf 17.64 in 448.00 mm
tw 2.831 in 71.900 mm
tf 4.528 in 115.000 mm
Area 195.61 in² 126,200.00 mm²
Ix 12,469.02 in⁴ 5,190,000,000 mm⁴
Iy 4,156.34 in⁴ 1,730,000,000 mm⁴
Sx 1,153.35 in³ 18,900,000 mm³
Sy 472.32 in³ 7,740,000 mm³
Zx 1,482.88 in³ 24,300,000 mm³
Zy 732.28 in³ 12,000,000 mm³
rx 7.99 in 203.00 mm
ry 4.61 in 117.00 mm
J 1,126.78 in⁴ 469,000,000 mm⁴
Cw 303,497.63 in⁶ 81,500,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HD 400×990.

Lighter in HD wide flange columns

HD 400×900

Weight
900.0 kg/m (-9.1%)
Depth
531.0 mm (-3.5%)
Ix
4,500,000,000 mm⁴ (-13%)

Heavier in HD wide flange columns

HD 400×1086

Weight
1,086.0 kg/m (+9.7%)
Depth
569.0 mm (+3.5%)
Ix
5,960,000,000 mm⁴ (+15%)

Closest Iₓ in HD wide flange columns

HD 400×818

Weight
818.0 kg/m (-17%)
Depth
514.0 mm (-6.5%)
Ix
3,920,000,000 mm⁴ (-24%)
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Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Eurocode 3 - UK National Annex · Methodology