Steel Beam Sizes / UK / SHS / SHS 400×400×12.5

SHS 400×400×12.5 Steel Beam Dimensions and Properties

UK Square hollow sections · v2023.11

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

Units

Section diagram

SHS 400×400×12.5 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 101.47 lb/ft 151.00 kg/m
Height 15.75 in 400.00 mm
Width 15.75 in 400.00 mm
t 0.492 in 12.500 mm
Area 29.76 in² 19,200.00 mm²
Ix 1,148.40 in⁴ 478,000,000 mm⁴
Iy 1,148.40 in⁴ 478,000,000 mm⁴
Sx 145.85 in³ 2,390,000 mm³
Sy 145.85 in³ 2,390,000 mm³
Zx 169.65 in³ 2,780,000 mm³
Zy 169.65 in³ 2,780,000 mm³
rx 6.22 in 158.00 mm
ry 6.22 in 158.00 mm
J 1,775.45 in⁴ 739,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus SHS 400×400×12.5.

Lighter in Square hollow sections

SHS 350×350×14.2

Weight
148.0 kg/m (-2.0%)
Depth
350.0 mm (-12%)
Ix
352,000,000 mm⁴ (-26%)

Heavier in Square hollow sections

SHS 350×350×16

Weight
166.0 kg/m (+9.9%)
Depth
350.0 mm (-12%)
Ix
389,000,000 mm⁴ (-19%)

Closest Iₓ in Square hollow sections

SHS 400×400×11

Weight
133.0 kg/m (-12%)
Depth
400.0 mm (0.0%)
Ix
427,000,000 mm⁴ (-11%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Hot-finished hollow sections · Methodology