Steel Beam Sizes / CISC / HSS Round / HA127×7.9

HA127×7.9 Steel Beam Dimensions and Properties

CISC Round HSS · v12.1

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

Units

Section diagram

HA127×7.9 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 15.70 lb/ft 23.30 kg/m
OD 5.000 in 127.000 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.281 in 7.150 mm
Area 4.17 in² 2,690.00 mm²
Ix 11.65 in⁴ 4,850,000 mm⁴
Iy 11.65 in⁴ 4,850,000 mm⁴
Sx 4.66 in³ 76,400.00 mm³
Sy 4.66 in³ 76,400.00 mm³
Zx 6.29 in³ 103,000.00 mm³
Zy 6.29 in³ 103,000.00 mm³
rx 1.67 in 42.40 mm
ry 1.67 in 42.40 mm
J 23.30 in⁴ 9,700,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HA127×7.9.

Lighter in Round HSS

HA152×6.4

Weight
22.9 kg/m (-1.9%)
Depth
— mm
Ix
7,100,000 mm⁴ (+46%)

Heavier in Round HSS

HA168×6.4

Weight
25.4 kg/m (+8.3%)
Depth
— mm
Ix
9,660,000 mm⁴ (+99%)

Closest Iₓ in Round HSS

HS127×7.9

Weight
23.3 kg/m (0.0%)
Depth
— mm
Ix
5,290,000 mm⁴ (+9.1%)
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Source: CISC Structural Section Tables SST12.1 · v12.1 · ASTM A500 · Availability: Check availability with the supplier. · Methodology