Steel Beam Sizes / CISC / HSS Square / HA178×178×7.9

HA178×178×7.9 Steel Beam Dimensions and Properties

CISC Square HSS · v12.1

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

Units

Section diagram

HA178×178×7.9 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 27.60 lb/ft 41.10 kg/m
Height 7.00 in 177.80 mm
Width 7.00 in 177.80 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.281 in 7.150 mm
Area 7.36 in² 4,750.00 mm²
Ix 54.54 in⁴ 22,700,000 mm⁴
Iy 54.54 in⁴ 22,700,000 mm⁴
Sx 15.62 in³ 256,000.00 mm³
Sy 15.62 in³ 256,000.00 mm³
Zx 18.37 in³ 301,000.00 mm³
Zy 18.37 in³ 301,000.00 mm³
rx 2.72 in 69.20 mm
ry 2.72 in 69.20 mm
J 87.21 in⁴ 36,300,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HA178×178×7.9.

Lighter in Square HSS

HA152×152×9.5

Weight
40.9 kg/m (-0.4%)
Depth
152.4 mm (-14%)
Ix
16,000,000 mm⁴ (-30%)

Heavier in Square HSS

HA127×127×13

Weight
42.3 kg/m (+2.9%)
Depth
127.0 mm (-29%)
Ix
10,600,000 mm⁴ (-53%)

Closest Iₓ in Square HSS

HA203×203×4.8

Weight
29.3 kg/m (-29%)
Depth
203.2 mm (+14%)
Ix
22,100,000 mm⁴ (-2.6%)
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Source: CISC Structural Section Tables SST12.1 · v12.1 · ASTM A500 · Methodology